Tetraethylenepentamine (TEPA) CAS 112-57-2
Chelora Chemicals is a supplier of high-purity Tetraethylenepentamine, shipping worldwide to lubricant additive blenders, epoxy formulators, carbon capture sorbent producers and specialty chemical manufacturers. Every consignment leaves with a batch-specific COA and the current SDS.
Also known as: TEPA · 1,11-Diamino-3,6,9-triazaundecane · Tetra(ethylenepentamine) · Pentaethylenetetramine mixture · TEPA technical
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- Batch-specific COA
- Safety Data Sheet (SDS)
- Technical Data Sheet
- Dangerous-goods papers
- Certificate of origin
What is Tetraethylenepentamine (TEPA)?
Tetraethylenepentamine is the fourth rung of the ethyleneamine ladder — five nitrogens joined by four ethylene bridges, with seven active amine hydrogens on the linear isomer. It is the highest of the family routinely traded as a defined product, and like TETA it is sold as a distribution rather than as a single compound.
It is a viscous, amber liquid boiling above 330 °C with a flash point near 163 °C. The high boiling point and viscosity are the defining physical features: it does not evaporate, it pumps slowly when cold, and it stays wherever it is put. From a safety standpoint that makes it one of the easier amines to handle, with no flammable headspace and negligible vapour exposure at ambient.
Five nitrogens on one molecule is a great deal of basicity and a great deal of functionality. It is fully miscible with water, strongly hygroscopic, absorbs carbon dioxide avidly — a property that has become an application rather than a nuisance — and darkens readily on air contact.
Commercially, TEPA's largest outlet is lubricant dispersants, where the high nitrogen count gives exceptional soot-handling capacity in modern diesel engine oils. It is also used as an epoxy curing agent for flexible systems, in corrosion inhibitors and asphalt additives, and increasingly as the amine loaded onto solid sorbents for carbon dioxide capture.
Why tetraethylenepentamine specifically
- Five nitrogens per molecule. The highest practical nitrogen density in the family, which is exactly what a dispersant needs to adsorb soot and oxidation products.
- Negligible volatility. Boiling above 330 °C, it stays in an engine sump, a sorbent bed or a cured film rather than evaporating out.
- A more flexible cured network. In epoxy, the long chain between crosslinks gives flexibility and impact resistance where DETA and TETA give hardness.
- Avid carbon dioxide uptake. What is a storage nuisance in a drum is the functional basis of amine-impregnated solid sorbents for carbon capture.
How TEPA is Manufactured
TEPA is the highest routinely isolated cut from the ethyleneamine train. Like TETA it is a distribution of linear, branched and cyclic isomers rather than a single compound.
- Ethyleneamine synthesis. Either ethylene dichloride is reacted with ammonia under pressure, or monoethanolamine is aminated with ammonia and hydrogen over a supported metal catalyst. Chain extension continues up the ladder.
- Isomer multiplication. At five nitrogens the number of possible structures is considerably larger than at four — linear, singly and doubly branched, and several piperazine-containing cyclics. Commercial TEPA contains a spread of these.
- Separation. The higher ethyleneamines are separated under deep vacuum, since atmospheric distillation would decompose them. Beyond TEPA the cut is usually taken as a heavies stream rather than as defined products.
- Finishing. The TEPA cut is taken to specification and filled with nitrogen blanketing. Colour control is harder here than lower on the ladder because of the thermal history.
Typical Commercial Specification
Figures below are representative of technical commercial grade. Higher-linear grades with tightened distribution are available — send us the specification you work to and we will quote against it.
| Parameter | Typical Value |
|---|---|
| Appearance | Viscous amber liquid |
| Composition | A distribution of linear, branched and cyclic C8 pentamines |
| Total amine value | 1340 – 1400 mg KOH/g |
| Total nitrogen content | 33.0% min |
| Primary amine nitrogen | Reported — relevant to dispersant and epoxy performance |
| Amine hydrogen equivalent weight (AHEW) | approx. 27.0 g/eq (linear, theoretical) |
| Water (Karl Fischer) | 0.5% max |
| Colour (Gardner) | 6 max |
| Specific gravity at 20 °C | 0.995 – 1.002 |
| Viscosity at 25 °C | approx. 100 – 130 mPa·s |
| Iron (Fe) | 3 ppm max |
| Non-volatile residue | 0.2% max |
Physical & Chemical Properties
| Property | Value |
|---|---|
| Molecular formula | C8H23N5 (linear isomer) |
| Molecular weight | 189.30 g/mol |
| Appearance | Viscous amber liquid |
| Odour | Mild ammoniacal — far less pungent than the lower ethyleneamines |
| Melting point | approx. −30 °C |
| Boiling point | above 330 °C with decomposition |
| Vapour pressure | Negligible at ambient temperature |
| Relative density | approx. 1.00 g/cm³ at 20 °C |
| Viscosity | approx. 100 – 130 mPa·s at 25 °C |
| Flash point | approx. 163 °C (closed cup) |
| Solubility in water | Miscible in all proportions; strongly hygroscopic |
| Functionality | Seven active amine hydrogens (linear isomer) |
| Total nitrogen | Approximately 33% by weight — the highest of the traded ethyleneamines |
| Composition | A distribution of isomers, not a single compound |
| Incompatibilities | Strong oxidisers, strong acids, acid chlorides, nitrites, isocyanates, copper and its alloys |
| Decomposition products | Oxides of nitrogen, carbon monoxide, carbon dioxide, ammonia |
Reactivity in practice
Seven active hydrogens across five nitrogens, most of them secondary. That nitrogen density is the whole proposition:
- Succinimide formation. Reaction with alkenyl succinic anhydride gives dispersants with five nitrogens in the polar head — the highest soot-handling capacity in the standard range.
- Epoxide ring opening. Seven active hydrogens crosslink epoxy resin, with long segments between junctions giving a flexible, impact-resistant network.
- Carbon dioxide capture. The amines react reversibly with carbon dioxide, which is the functional basis of amine-impregnated solid sorbents for direct air capture and flue gas treatment.
- Imidazoline and amide formation. Condensation with fatty acids gives multi-nitrogen imidazolines and amides for corrosion inhibitors and asphalt additives.
TEPA vs EDA, DETA and TETA
The ethyleneamines form a ladder: each step adds one more ethylene bridge and one more nitrogen. Going up it, the boiling point and viscosity rise steeply, the number of active amine hydrogens increases, and — importantly — the product stops being a single compound and becomes a distribution of linear, branched and cyclic isomers. They all come off the same plant and move together on availability.
| Ethyleneamine | CAS | Functionality & principal use |
|---|---|---|
| Ethylenediamine (EDA) | 107-15-3 | 2 N, 4 active H — EDTA chelants, dithiocarbamate fungicides, bleach activators, epoxy chemistry |
| Diethylenetriamine (DETA) | 111-40-0 | 3 N, 5 active H — epoxy hardeners, DTPA chelants, fuel and lube additives, wet-strength resins |
| Triethylenetetramine (TETA) | 112-24-3 | 4 N, 6 active H — epoxy hardeners, asphalt additives; supplied as an isomer distribution |
| Tetraethylenepentamine (TEPA) | 112-57-2 | 5 N, 7 active H — lubricant dispersants, epoxy hardeners, CO₂ sorbents; also a distribution |
Stated plainly: EDA and DETA are genuine single compounds; TETA and TEPA as sold are distributions of isomers with a nominal name, and the linear content is what a formulator actually pays for. Going up the ladder, each additional nitrogen adds crosslink functionality and basicity while raising viscosity and lowering volatility — so a lower member cures faster and smells more, and a higher one builds a denser network and stays where it is put. Substituting across the ladder is always a reformulation.
Industries We Supply TEPA To
The same product leaves our warehouse for very different factories. What changes between them is not the CAS number but the grade, the amine value and nitrogen content, and the documentation each sector expects.
Where TEPA is Used
TEPA is bought for nitrogen density and non-volatility. These are the end uses our customers buy it for, roughly in order of volume.
In lubricant dispersants
This is TEPA's largest market and the clearest expression of why nitrogen density matters. A succinimide dispersant is a polyisobutylene tail attached to a polyamine head: the tail keeps it dissolved in the oil, and the head adsorbs onto soot and oxidation products to keep them suspended rather than settling as sludge. More nitrogens means more adsorption capacity per molecule, which is why modern diesel oils — running high exhaust gas recirculation and correspondingly high soot loadings — favour the higher ethyleneamines. TEPA's negligible volatility also means the additive stays in the sump rather than evaporating from a hot engine.
In carbon dioxide capture
What makes TEPA awkward to store has become a genuine application. Impregnating a porous solid support — silica, alumina or a polymer — with TEPA gives a sorbent with a very high density of amine sites that react reversibly with carbon dioxide. Heating or reducing pressure releases it again. These amine-functionalised solid sorbents are an active area in both flue gas treatment and direct air capture, where the appeal over liquid amine scrubbing is lower regeneration energy and no solvent circulation. Sorbent producers care about nitrogen content, amine distribution and oxidative stability.
As a flexible epoxy hardener
Seven active hydrogens give high functionality, but the long chain segments between crosslink points produce a network that is flexible and impact-resistant rather than hard and brittle. That makes TEPA the choice where a coating has to tolerate substrate movement or impact — flexible coatings, crack-bridging systems, some adhesives — and the wrong choice where maximum hardness and chemical resistance are wanted. It is almost always used in blends and adducts rather than neat.
In corrosion inhibitors and asphalt additives
Multi-nitrogen imidazolines and amides made from TEPA have more anchoring points to a metal or mineral surface than their DETA equivalents, and their non-volatility means they persist in service. In asphalt they bind bitumen to wet aggregate and resist the moisture stripping that destroys road surfaces; in oilfield service they film on steel and stay there. Blenders care more about batch-to-batch consistency of nitrogen content than about any notion of purity.
Need TEPA for a specific grade or volume?
Tell us the grade, the amine value and nitrogen content you work to and the annual quantity. We will come back with a price, a lead time and a sample COA — delivered to any port worldwide.
Quality Control & Testing
Every lot is released against a batch-specific Certificate of Analysis. The methods behind the numbers are standard across the industry, and we are happy to share them or to work to your own in-house test protocol.
- Total amine value and nitrogen content — titration and elemental nitrogen. These two are the figures that actually predict performance for a distribution product, and they should be agreed before anything else.
- Primary amine nitrogen — titration. Primary amines behave differently from secondary ones in both succinimide formation and epoxy curing, so the split matters.
- Isomer distribution — gas chromatography where the method resolves it. At five nitrogens the distribution is complex, so nitrogen content is often the more practical control.
- Colour — Gardner against a standard. TEPA is the darkest of the traded ethyleneamines and darkens further on air contact.
- Water content — Karl Fischer titration. Strongly hygroscopic, with carbon dioxide uptake compounding the drift.
- Viscosity — a practical check correlating with heavies content and directly relevant to pumping and metering.
Common Process Problems & Likely Causes
When TEPA misbehaves in a plant, the cause is usually one of a short list of things. This table is the shortcut our technical desk works through before anyone opens a complaint file.
| Symptom | Likely cause | What to check |
|---|---|---|
| Dispersant soot capacity below target | Nitrogen content or primary amine fraction lower than the qualification lot | Total nitrogen and primary amine nitrogen versus the COA, lot to lot |
| Epoxy cure softer than with TETA | Expected — long segments between crosslinks give flexibility, not hardness | Hardener selection against the required properties, not a quality issue |
| Amine value below the certificate | Carbon dioxide and water pickup after the drum was opened | Water content and amine value now versus on the COA; reseal discipline |
| Sorbent capacity dropping over cycles | Oxidative or thermal degradation of the amine on the support | Regeneration temperature, oxygen exposure, amine loading — usually process, not feedstock |
| Pumping difficult in cold weather | High viscosity at low temperature — normal behaviour | Line sizing, heat tracing, or warm before transfer |
| Finished product darker than expected | TEPA is the darkest of the traded ethyleneamines and darkens further on air contact | Gardner colour on receipt versus COA, storage blanket and temperature |
| Performance varying between producers | Isomer distributions differ more at five nitrogens than lower on the ladder | Requalify on amine value and nitrogen content rather than on the product name |
| Corrosion on transfer fittings | Copper, brass, bronze or aluminium in contact with the amine | Materials of construction — stainless steel or lined equipment |
Packaging, Storage & Shipping
- Standard packing. 210 kg net in lined steel or HDPE drums, with 1000 L IBCs for larger users.
- Bulk packing. Road tankers and ISO tank containers for lubricant additive and sorbent producers.
- Viscosity. TEPA is viscous at room temperature and pumps slowly when cold. Allow for it in line sizing and pump selection, or warm before transfer.
- Carbon dioxide exclusion. TEPA absorbs carbon dioxide avidly — more so than the lower ethyleneamines, since it has more sites. Keep containers sealed and blanket bulk storage; an open drum loses amine value measurably.
- Inert blanketing. Nitrogen-blanketed at fill where colour matters. The ethyleneamines darken on air contact more readily than most amines, and they also absorb carbon dioxide to form carbamate.
- Materials of construction. Stainless steel or suitable lined vessels. Avoid copper, brass, bronze, aluminium and mercury.
- Shelf life. Typically 12 months in unopened original packing under those conditions. Beyond that, re-test rather than assume.
- Comfortable handling class. A flash point near 163 °C and negligible vapour pressure mean no flammable headspace and minimal inhalation exposure at ambient. It remains corrosive and a sensitiser.
- Transport classification. Typically UN 2735, Amines, liquid, corrosive, n.o.s., Class 8, Packing Group III. Confirm the entry against the current SDS for your destination and mode.
Hazards & Safe Handling
Tetraethylenepentamine is corrosive and a skin sensitiser. It must be handled by trained personnel under a proper risk assessment. The classifications below are indicative — the current SDS supplied with your consignment is the governing document.
- Sensitisation. The ethyleneamines are recognised skin sensitisers, and several are respiratory sensitisers as well. Once a worker is sensitised, exposures previously tolerated can provoke a reaction, so preventing first contact matters far more than managing repeat contact. This is the dominant occupational concern across this whole family.
- Exposure control. Handle in a closed system or under local exhaust ventilation. Where the material is warmed or sprayed, vapour and mist exposure rise sharply and need their own controls.
- PPE. Chemical-resistant gloves rated for amines, chemical goggles and face shield, and chemical-resistant clothing. Glove breakthrough time is worth checking rather than assuming.
- Mixed-system handling. In a two-part epoxy system the uncured mixture carries the hazards of both hardener and resin. Applicators handling mixed material need controls for both, which is often where site assessments fall short.
- Incompatibilities. Strong oxidising agents, strong acids, acid chlorides, nitrites and isocyanates — the amine-isocyanate reaction is violently exothermic. Also copper, brass, bronze and aluminium.
- Spill response. Contain, absorb with inert non-combustible material and collect in a labelled closed container. Ventilate. Do not wash to drain.
- Environment. Harmful to aquatic life. Do not allow to enter drains, surface water or groundwater. Dispose through a licensed chemical waste contractor.
- First aid. Remove contaminated clothing immediately, wash skin with plenty of water and soap, flush eyes for at least 15 minutes, and seek medical attention with the SDS to hand. Report any skin or breathing reaction, which may indicate developing sensitisation.
Regulatory & Compliance Notes
Tetraethylenepentamine is an established industrial chemical and is listed on the major national chemical inventories. Because obligations differ by territory, volume and use, the notes below are orientation rather than legal advice — confirm your own position with your regulatory adviser before importing.
- Inventory status. Listed on the principal chemical inventories in the major importing regions. Ask us for the inventory confirmation relevant to your destination country.
- Import registration. Several territories require the importer to hold a registration or notification before a consignment lands. Start that process early — it is the most common cause of delay at destination.
- Hazard communication. Supplied with an SDS compliant with the format applicable to your region, and labelled in line with the GHS classification for the product.
- Sensitiser labelling and training. As a skin sensitiser, TEPA triggers specific labelling and, in several jurisdictions, training obligations for workers handling epoxy systems. These apply downstream as well as at the formulator.
- Substance identity for a distribution. Because commercial TEPA is a distribution rather than a single compound, substance identification under registration schemes can be more involved than for a defined chemical. Make sure your registration or notification covers the material you actually import.
- Environmental classification. Classified as toxic to aquatic life in most systems. Effluent must be treated or consigned to licensed disposal, never discharged.
- Dangerous goods. Typically UN 2735, Amines, liquid, corrosive, n.o.s., Class 8, Packing Group III. Confirm against the current SDS; declarations prepared for IMDG (sea) or IATA (air) as appropriate.
We Supply TEPA Worldwide
Chelora Chemicals is a supplier and export partner, not a single-plant trader. We ship Tetraethylenepentamine (TEPA) from India to customers across Asia, Europe, the Middle East, Africa, and North and South America, handling the export documentation, dangerous-goods paperwork and freight so the material arrives ready to use.
- Incoterms. EXW, FOB, CIF, CFR and DAP quoted to suit your purchasing terms and freight arrangements.
- Ports. Regular shipments through Nhava Sheva (JNPT) and Mundra, with other Indian ports arranged where it suits the routing.
- Documentation. Commercial invoice, packing list, certificate of origin, COA, SDS and dangerous-goods declaration issued as a complete set.
- Flexible volumes. A single drum for laboratory qualification, through LCL consolidations, up to repeat full loads on a supply contract.
- Supply continuity. Because we are independent of any one producer, a plant turnaround or a shipping disruption at one source does not have to become your stock-out.
Buying TEPA from Chelora
We are an independent sourcing and supply partner. For TEPA that means specifying on nitrogen content and amine value rather than on assay, because at the top of the ethyleneamine ladder the product is a distribution and those are the only figures that travel meaningfully between producers.
- Documentation on every lot. Batch-specific COA including amine value, total nitrogen and primary amine nitrogen.
- Grade consistency. Material sourced against the figures you qualified on, not simply against the product name.
- Samples before commitment. Trial quantities for formulation or sorbent qualification ahead of a commercial order.
- Quantities. From a single 210 kg drum through to repeat tank loads on contract supply.
- Export experience. Class 8 dangerous-goods documentation, packing and labelling handled for sea and road freight.
- Related intermediates. EDA, DETA, TETA, piperazine, AEEA and the wider ethyleneamine range from one supplier.
How ordering works
- Send the enquiry. Product, grade or specification, quantity, destination port and the Incoterm you buy on. If you have a spec sheet, attach it — it saves a round trip.
- We quote. Price, lead time, packing and a sample COA, normally within one working day.
- Sample and qualify. For first orders or critical applications, we send a trial quantity so your lab can sign off before you commit.
- Confirm the order. Proforma invoice issued; payment terms agreed against the volume and the relationship.
- Production and QC. Material allocated and released against a batch-specific COA, with a pre-shipment sample where the application calls for it.
- Ship and document. Packed, labelled and loaded with the full export and dangerous-goods document set, and tracked through to arrival.
Tetraethylenepentamine (TEPA) — Common Questions
The questions our technical desk is asked most often about TEPA. If yours isn't here, call or email and you will reach someone who knows the chemistry.
What is the CAS number of Tetraethylenepentamine?
The CAS number for Tetraethylenepentamine is 112-57-2, and its EC number is 203-986-2. It is also listed as TEPA and 1,11-diamino-3,6,9-triazaundecane. The molecular formula of the linear isomer is C8H23N5 with a molecular weight of 189.30 g/mol.
Is commercial TEPA a single compound?
No. Like TETA, what is sold as TEPA is a distribution — linear, singly and doubly branched, and several piperazine-containing cyclic isomers. At five nitrogens the number of possible structures is larger than at four, so the spread is wider and differs more between producers. For that reason the useful specifications are total amine value, total nitrogen content and primary amine nitrogen rather than any notion of assay.
What is TEPA used for?
Its largest market is lubricant dispersants, where five nitrogens in the polar head give the highest soot-handling capacity in the standard range for modern diesel engine oils. It is also used as a flexible epoxy hardener, in corrosion inhibitors and asphalt adhesion promoters, in fuel additives and chelating agents, and increasingly as the amine impregnated onto solid sorbents for carbon dioxide capture.
Do you supply TEPA worldwide?
Yes. Chelora Chemicals supplies and exports tetraethylenepentamine worldwide — across Asia Pacific, Europe, the Middle East, Africa and the Americas, as well as throughout India. We quote on EXW, FOB, CIF, CFR and DAP terms, ship mainly through Nhava Sheva and Mundra, and handle the commercial invoice, packing list, certificate of origin, COA, SDS and dangerous-goods declaration as a complete document set.
Why is TEPA preferred for diesel engine dispersants?
Nitrogen density and non-volatility. A succinimide dispersant has a polyisobutylene tail that keeps it dissolved in the oil and a polyamine head that adsorbs soot and oxidation products to keep them suspended. More nitrogens in the head means more adsorption capacity per molecule, and modern diesel engines running high exhaust gas recirculation generate far more soot than older designs. TEPA also boils above 330 °C, so the additive stays in the sump rather than evaporating from a hot engine.
How is TEPA used in carbon capture?
By impregnating it onto a porous solid support — silica, alumina or a polymer — to give a sorbent with a very high density of amine sites. Those sites react reversibly with carbon dioxide, and heating or reducing pressure releases it again. Amine-functionalised solid sorbents are an active area in both flue gas treatment and direct air capture, where the appeal over liquid amine scrubbing is lower regeneration energy and no solvent circulation. The property that makes TEPA awkward to store is the property that makes this work.
What should I specify instead of assay?
Total amine value, total nitrogen content and primary amine nitrogen. Assay in the conventional sense means little for a distribution product, whereas those three figures predict performance and travel meaningfully between producers. The primary amine split matters specifically because primary amines behave differently from secondary ones in both succinimide formation and epoxy curing.
How does TEPA compare with TETA and DETA as an epoxy hardener?
It gives a more flexible, impact-resistant network and a longer pot life, at the cost of hardness, glass-transition temperature and chemical resistance. Going down the ladder from TEPA to TETA to DETA, the cure gets faster and the network harder and more brittle. TEPA is the right choice for flexible coatings and crack-bridging systems and the wrong one where maximum hardness is wanted. It is almost always used in blends and adducts rather than neat.
How is TEPA manufactured?
As the highest routinely isolated cut from the ethyleneamine train, made by reacting either ethylene dichloride with ammonia under pressure or monoethanolamine with ammonia and hydrogen over a catalyst. Chain extension continues up the ladder, and at five nitrogens the chain can extend linearly, branch at one or two nitrogens, or close into piperazine rings. Separation is under deep vacuum, since atmospheric distillation would decompose the material.
Why does an open drum lose amine value?
Carbon dioxide, and TEPA absorbs it more avidly than the lower ethyleneamines because it has more amine sites per molecule. The reaction forms carbamate and consumes amine functionality, so an open drum drifts below its certified amine value while also picking up moisture. Keep containers sealed and blanket bulk storage — with this product the drift is measurable rather than theoretical.
Is TEPA difficult to pump?
It is viscous — around 100 to 130 mPa·s at 25 °C — and it thickens considerably in cold weather. That is not a quality problem but it does need designing for: line sizing, pump selection and, in cold climates, heat tracing or warming before transfer. The upside of the same property is that it has negligible vapour pressure and no flammable headspace, which makes it one of the safer amines to be around.
Is TEPA a sensitiser?
Yes, TEPA is classified as a skin sensitiser, as are the other ethyleneamines. Once a worker is sensitised, exposures previously tolerated can provoke a reaction, so preventing first contact matters more than managing repeat contact. In two-part epoxy systems the uncured mixture carries the hazards of both hardener and resin.
How should TEPA be stored, and what is its shelf life?
Store in a cool, dry, well-ventilated area away from acids, oxidisers, nitrites and isocyanates, with containers tightly sealed and bulk storage nitrogen-blanketed. Sealing matters particularly here because of the avid carbon dioxide uptake. Use stainless steel or suitably lined equipment and avoid copper, brass, bronze and aluminium. Unopened original packing typically carries a 12-month shelf life.
What are the hazards of handling TEPA?
It causes severe skin burns and serious eye damage, is a skin sensitiser, is harmful if swallowed and in contact with skin, and is toxic to aquatic life. Fire risk is low and vapour exposure negligible at ambient — the flash point is near 163 °C — so skin contact and sensitisation are the real concerns. Always work from the current SDS.
How is TEPA classified for transport?
It is typically shipped under UN 2735, Amines, liquid, corrosive, n.o.s., Class 8, Packing Group III. Because this is a generic entry rather than a named one, confirm the classification and packing group against the current SDS and the shipper's declaration for your destination and mode. We supply the full dangerous-goods documentation.
What packing sizes and order quantities are available?
Standard packing is 210 kg net in lined steel or HDPE drums, with 1000 L IBCs for larger users and road tankers or ISO tanks for lubricant additive and sorbent producers. Orders run from a single drum for trial work up to repeat tank loads on contract supply.
Can TEPA be substituted with another polyamine?
Within limits. TETA substitutes in dispersants and epoxy at a lower nitrogen count, which means less soot capacity and a harder cure. Heavier polyamine blends go the other way and are used where even more nitrogen is wanted, though they are less well defined. The real caution is between producers rather than between products: because TEPA is a distribution and the spreads differ, changing supplier warrants requalification on amine value and nitrogen content even though the name and CAS number are identical.
Ready to source Tetraethylenepentamine (TEPA)?
Send us your specification, grade and annual volume. You will get a price, a realistic lead time and a sample COA from someone who understands what the material has to do in your process — delivered anywhere in the world.