2,3,4-Trichloronitrobenzene 2,3,4-TCNB · CAS 17700-09-3
Chelora Chemicals is a supplier of 2,3,4-Trichloronitrobenzene, a trichlorinated nitrobenzene isomer used as an intermediate in dye, pigment and agrochemical synthesis where the adjacent 2,3,4-chlorination pattern combined with the nitro group's reduction and substitution chemistry is specifically required. Every consignment leaves with a batch-specific COA and the current SDS.
Also known as: 2,3,4-TCNB, 1,2,3-Trichloro-4-nitrobenzene
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Price, lead time and a sample COA for 2,3,4-Trichloronitrobenzene, usually within one working day. We ship worldwide.
Request a Quote Email the DeskDocumentation
- Batch-specific COA (assay, isomer purity, melting point)
- Safety Data Sheet (SDS)
- UN 1578 dangerous-goods transport documents
- Third-party inspection on request
- Certificate of origin
What is 2,3,4-Trichloronitrobenzene?
2,3,4-Trichloronitrobenzene is a benzene ring carrying three adjacent chlorine atoms and a nitro group, formula C₆H₂Cl₃NO₂. It is supplied as an off-white to pale yellow crystalline solid, melting in the range of 53 – 56 °C.
Its value as an intermediate comes from combining two reactive features on one ring: the nitro group, which can be reduced to an amine or used to activate the ring for further substitution, and the dense, adjacent trichloro substitution pattern, which some dye, pigment and agrochemical syntheses are specifically built around.
Commercially it is produced by nitration of the corresponding trichlorobenzene isomer, or by stepwise chlorination of a nitrobenzene precursor, depending on which route gives better isomer selectivity and yield.
Handling follows standard precautions for a nitroaromatic solid — chemical-resistant gloves and eye protection, adequate ventilation and dust control, and storage away from incompatible materials such as strong bases and oxidisers.
Why 2,3,4-Trichloronitrobenzene specifically
- A specific adjacent trichloro-nitro pattern. The combination of three adjacent chlorines with a nitro group gives reactivity that the 2,4,5- and other trichloronitrobenzene isomers do not reproduce.
- Dye and pigment intermediate. Used in selected dye-intermediate syntheses requiring this specific substitution pattern.
- Agrochemical building block. A starting material for certain herbicide and pesticide intermediate routes.
- Nitro-group versatility. The nitro group can be reduced to the corresponding trichloroaniline or used to direct further substitution chemistry on the ring.
How 2,3,4-Trichloronitrobenzene is Manufactured
2,3,4-Trichloronitrobenzene is produced either by nitrating 1,2,3-trichlorobenzene under controlled conditions, or by chlorinating a nitrobenzene precursor in a stepwise sequence, with the choice of route driven by isomer selectivity.
- Ring functionalisation. Nitration of 1,2,3-trichlorobenzene, or sequential chlorination of nitrobenzene, under conditions controlled for isomer selectivity.
- Isomer separation. The target 2,3,4-isomer is separated from other trichloronitrobenzene isomers formed as co-products, typically by crystallisation.
- Purification. The isolated fraction is purified to the target assay and melting-point specification.
- Quality release and packing. Assay, melting point and isomer purity are confirmed against specification before the batch is packed and released.
Typical Commercial Specification
Figures below are representative of commercial-grade 2,3,4-trichloronitrobenzene. Tell us your downstream route and the grade you need, and we will advise on the specification to order against.
| Parameter | Typical Value |
|---|---|
| Appearance | Off-white to pale yellow crystalline solid |
| 2,3,4-Trichloronitrobenzene content | 97% min by GC assay |
| Melting point | 53 – 56 °C |
| Isomer purity | Other trichloronitrobenzene isomers, trace levels to grade |
| Moisture content | To grade, typically 0.2% max |
Physical & Chemical Properties
| Property | Value |
|---|---|
| Chemical formula | C₆H₂Cl₃NO₂ |
| Molecular weight | 226.44 g/mol |
| Appearance | Off-white to pale yellow solid |
| Melting point | 53 – 56 °C |
| Boiling point | About 296 °C (predicted) |
| Density | Confirm against your current SDS* |
| Flash point | Above 110 °C |
| Water solubility | Insoluble |
| Incompatibilities | Strong bases, strong oxidisers |
Behaviour in the process
2,3,4-Trichloronitrobenzene's reactivity pattern is what dye and agrochemical producers are buying:
- Nitro reduction. The nitro group can be reduced to give 2,3,4-trichloroaniline, a route into further dye- and agrochemical-intermediate chemistry.
- Nucleophilic aromatic substitution. The nitro group activates the ring for displacement of an adjacent chlorine under suitable conditions.
- Thermal stability. Stable under normal storage conditions, but nitroaromatics should be kept from strong heat sources and incompatible reagents.
2,3,4-Trichloronitrobenzene and Related Chloronitrobenzenes
Choosing between trichloronitrobenzene isomers and related chloronitrobenzenes comes down to which substitution pattern the target synthesis needs.
| Material | Substitution | When it is the right choice |
|---|---|---|
| 2,3,4-Trichloronitrobenzene | 2,3,4-triCl, 1-NO₂ | Routes needing the adjacent trichloro-nitro pattern specifically |
| 2,3-Dichloronitrobenzene | 2,3-diCl, 1-NO₂ | Routes needing a dichloro rather than trichloro pattern |
| 1,2,3-Trichlorobenzene | 1,2,3-triCl, no NO₂ | Routes that do not need the nitro-group reactivity |
| para-Fluoronitrobenzene | 4-F, 1-NO₂ | Routes needing fluorine's superior SNAr leaving-group ability instead of chlorine |
Stated plainly: a synthesis built around the adjacent 2,3,4-trichloro-nitro pattern needs this specific isomer — the other trichloronitrobenzene isomers have different reactivity and are not drop-in substitutes.
Industries We Supply 2,3,4-Trichloronitrobenzene To
The same trichloronitrobenzene isomer feeds a dye-intermediate manufacturer and an agrochemical plant. What changes is the downstream functionalisation chemistry and the documentation each requires.
Where 2,3,4-Trichloronitrobenzene is Used
In downstream functionalisation
2,3,4-Trichloronitrobenzene is carried through nitro reduction or further substitution chemistry to build the target dye or agrochemical intermediate. The adjacent trichloro pattern combined with the nitro group gives distinct reactivity compared with other chloronitrobenzene isomers, which is often exactly why a route is designed around this material specifically.
Need a specific purity or isomer grade?
Tell us the purity and isomer-purity grade you need, your downstream chemistry, the packing format you can receive and the annual quantity. We will come back with a price, a lead time and a sample COA.
Quality Control & Testing
Every lot is released against a batch-specific Certificate of Analysis, with isomer purity reported alongside the main assay because carryover of other trichloronitrobenzene isomers affects downstream reaction selectivity.
- 2,3,4-Trichloronitrobenzene content — by GC assay, the primary grade measure.
- Melting point — a fast purity and identity check.
- Isomer purity — other trichloronitrobenzene isomer carryover, reported because it affects downstream chemistry.
- Moisture content — measured because moisture can affect downstream reaction yield.
Common Process Problems & Likely Causes
| Symptom | Likely cause | What to check |
|---|---|---|
| Off-target reaction product | Other trichloronitrobenzene isomer carryover | Isomer purity figure on the COA |
| Poor reduction yield | Moisture or trace impurities | Moisture content and assay on the COA |
| Off-shade dye product | Isomer or colour-grade impurities | Colour specification and isomer breakdown on the COA |
Packaging, Storage & Shipping
- Standard packing. Fibre drums or HDPE bags, typically 25 – 200 kg net, with larger bulk formats on contract supply.
- Moisture protection. Keep sealed and protected from moisture ingress during storage.
- Temperature control. Store in a cool, dry, well-ventilated area away from direct sun, heat and incompatible materials.
- Material compatibility. Avoid contact with strong bases and strong oxidisers.
- Transport classification. Commonly shipped under UN 1578 (Nitrochlorobenzenes), Class 6.1, Packing Group III — confirm against your own current SDS before shipping.
Hazards & Safe Handling
2,3,4-Trichloronitrobenzene is harmful if swallowed, inhaled or in contact with skin, and causes skin and eye irritation. Standard precautions for a nitroaromatic solid and good laboratory and plant practice apply throughout handling.
- Skin and eye contact. Chemical-resistant gloves and goggles are standard practice for chlorinated nitroaromatics; rinse thoroughly with water on contact.
- Inhalation. Use adequate ventilation and dust control when handling the crystalline solid.
- PPE. Chemical-resistant gloves, safety goggles and, where dust is generated, a suitable respirator.
- Storage conditions. Recommended storage at 2 – 8 °C for extended shelf life; confirm against your own SDS.
Regulatory & Compliance Notes
2,3,4-Trichloronitrobenzene is a registered specialty chloronitroaromatic. Because obligations differ by territory and use, the notes below are orientation rather than legal advice.
- GHS classification. Classified as harmful if swallowed, in contact with skin or if inhaled, and causing skin and eye irritation; the SDS carries the full hazard statements for your grade.
- REACH and chemical inventories. Registered under EU REACH and listed on major chemical inventories.
- Dangerous goods transport. Commonly shipped under UN 1578 (Nitrochlorobenzenes), Class 6.1, Packing Group III. Confirm with your logistics/EHS team against your current SDS before shipping.
- HS code. Commonly declared under the nitro-compound derivatives heading; confirm the exact tariff line with your customs broker for your jurisdiction.
We Supply 2,3,4-Trichloronitrobenzene Worldwide
Chelora Chemicals is a supplier and export partner, not a single-plant trader. We ship 2,3,4-Trichloronitrobenzene from India and from partner sources to customers across Asia, Europe, the Middle East, Africa, and North and South America, handling the export documentation 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 ports arranged as routing allows.
- Documentation. Commercial invoice, packing list, certificate of origin, COA and SDS issued as a complete set.
- Flexible volumes. From trial quantities up to repeat bulk shipments on a supply contract.
Buying 2,3,4-Trichloronitrobenzene from Chelora
We are an independent sourcing and supply partner. For this product that means settling three things at enquiry: the purity and isomer-purity grade your application needs, the packing format, and the quantity you are buying.
- Documentation on every lot. Batch-specific COA with assay and isomer breakdown, plus the current SDS.
- Analysis before commitment. Representative analysis shared ahead of a commercial order so your lab can qualify the material.
- Quantities. Trial quantities through to larger bulk shipments on contract supply.
- Inspection. Independent third-party inspection available at loading when the contract requires it.
- Related chloronitrobenzenes. Other chloronitrobenzene and trichlorobenzene isomers alongside this product from one supplier.
How ordering works
- Send the enquiry. Purity, isomer-purity grade, quantity, destination port and the Incoterm you buy on.
- We quote. Price, lead time, packing format and a sample COA, normally within one working day.
- Qualify the supply. For first orders or dye-grade applications, we share the analysis so your technical team can sign off before you commit.
- Confirm the order. Proforma invoice issued; payment terms agreed against the volume and the relationship.
- Ship and document. Packed, labelled and loaded with the full export document set, and tracked through to arrival.
2,3,4-Trichloronitrobenzene — Common Questions
The questions our technical desk is asked most often about 2,3,4-Trichloronitrobenzene. If yours isn't here, call or email and you will reach someone who knows the chemistry.
What is the CAS number of 2,3,4-Trichloronitrobenzene?
The CAS number for 2,3,4-Trichloronitrobenzene is 17700-09-3. Its molecular formula is C₆H₂Cl₃NO₂ with a molecular weight of 226.44 g/mol.
What is 2,3,4-Trichloronitrobenzene used for?
It is used as a building block in dye-intermediate and agrochemical synthesis where the adjacent trichloro-nitro substitution pattern is specifically required, and as a research and screening compound.
Do you supply 2,3,4-Trichloronitrobenzene worldwide?
Yes. Chelora Chemicals supplies and exports 2,3,4-Trichloronitrobenzene worldwide — across Asia Pacific, Europe, the Middle East, Africa and the Americas, as well as throughout India. Every consignment carries the COA and SDS.
How is 2,3,4-Trichloronitrobenzene manufactured?
By nitrating 1,2,3-trichlorobenzene, or by chlorinating a nitrobenzene precursor in a controlled stepwise sequence, then separating and purifying the target isomer.
Is 2,3,4-Trichloronitrobenzene hazardous?
It is harmful if swallowed, in contact with skin or if inhaled, and causes skin and eye irritation. Refer to the current SDS for your grade for the complete hazard classification.
What is the UN number and transport classification?
2,3,4-Trichloronitrobenzene is commonly shipped under UN 1578 (Nitrochlorobenzenes), Class 6.1, Packing Group III. Confirm this against your own current SDS before relying on it for shipping documentation.
What are the melting point and boiling point?
Typical figures are a melting point of 53 – 56 °C and a predicted boiling point around 296 °C. Density should be confirmed against your own supplier's COA, since published figures for this specific isomer are estimates rather than confirmed experimental values.
How should 2,3,4-Trichloronitrobenzene be stored?
In sealed containers, cool and dry, ideally at 2 – 8 °C, and away from strong bases and strong oxidisers.
What purity grades do you offer?
Standard commercial grade is 97% minimum by GC assay, with isomer purity (versus other trichloronitrobenzene isomers) and moisture content reported on the COA.
What packing sizes and order quantities are available?
Fibre drums or HDPE bags, typically 25–200 kg net, with larger bulk formats available on contract supply. Orders run from trial quantities up to repeat bulk loads.
Ready to source 2,3,4-Trichloronitrobenzene?
Send us your purity requirement 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.