Ortho Chloro Aniline o-Chloroaniline · OCA · CAS 95-51-2
Chelora Chemicals is a supplier of Ortho Chloro Aniline, the ortho-substituted chloroaniline isomer used widely across dye, pigment, pharmaceutical, agrochemical and rubber-chemical synthesis. Every consignment leaves with a batch-specific COA and the current SDS.
Also known as: OCA, o-chloroaniline, 2-chloroaniline, 2-chlorobenzenamine, 2-chloroaminobenzene
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Price, lead time and a sample COA for Ortho Chloro Aniline, usually within one working day. We ship worldwide.
Request a Quote Email the DeskDocumentation
- Batch-specific COA (assay, isomer purity, colour)
- Safety Data Sheet (SDS)
- Dangerous-goods transport documents, confirmed to your SDS
- Third-party inspection on request
- Certificate of origin
What is Ortho Chloro Aniline?
Ortho Chloro Aniline is an aromatic amine carrying a chlorine atom and an amino group in the 1,2 (ortho) relationship on the benzene ring, formula C₆H₆ClN. Unlike the dinitro- and chloronitro-benzene intermediates it is produced from, it is a liquid at room temperature — a pale yellow to amber liquid with a melting point around -2 °C and a boiling point around 209 °C.
It is produced industrially by reducing ortho-chloronitrobenzene, and is in turn the building block for a wide range of dyes, pigments, pharmaceutical actives, agrochemicals and rubber chemicals that are built around the o-chloroaniline substitution pattern.
As with the other chloroaniline/chloronitrobenzene isomers, the ortho substitution pattern is not interchangeable with the meta- or para-isomer — a synthesis route built around o-chloroaniline needs this isomer specifically, not a related one.
Handling follows standard precautions for a toxic aromatic amine liquid — chemical-resistant gloves, eye and skin protection, adequate ventilation, and storage away from strong oxidisers and acids.
Why Ortho Chloro Aniline specifically
- Direct dye and pigment intermediate. Widely used in azo-dye and pigment synthesis requiring the ortho-chloroaniline substitution pattern.
- Pharmaceutical building block. Used in the synthesis of active pharmaceutical ingredients and intermediates requiring this specific aromatic amine.
- Agrochemical intermediate. Feedstock for herbicide, fungicide and other crop-protection active ingredient synthesis.
- Rubber chemical intermediate. Used in selected rubber-additive synthesis routes.
- Not interchangeable with the meta- or para-isomer. The substitution pattern determines the reactivity and the downstream chemistry a given synthesis route is built around.
How Ortho Chloro Aniline is Manufactured
Ortho Chloro Aniline is manufactured from ortho-chloronitrobenzene, itself a direct nitration product of chlorobenzene (chlorine being an ortho/para-directing substituent).
- Chlorobenzene nitration. Chlorobenzene is nitrated, giving predominantly a mixture of ortho- and para-chloronitrobenzene.
- Isomer separation. The ortho- and para-isomers are separated, typically by fractional crystallisation or distillation, to isolate ortho-chloronitrobenzene.
- Catalytic reduction. Ortho-chloronitrobenzene is reduced (commonly via catalytic hydrogenation) to give ortho-chloroaniline.
- Purification and release. The product is purified, and assay, colour and moisture are confirmed against specification before the batch is packed and released.
Typical Commercial Specification
Figures below are representative of commercial-grade Ortho Chloro Aniline. Tell us your downstream route and the grade you need, and we will advise on the specification to order against.
| Parameter | Typical Value |
|---|---|
| Appearance | Pale yellow to amber liquid |
| o-Chloroaniline content | 99% min by GC assay |
| Colour | To grade, reported on COA (APHA/Gardner as applicable) |
| Isomer purity | meta- and para-chloroaniline, trace levels to grade |
| Moisture content | To grade, typically 0.3% max |
Physical & Chemical Properties
| Property | Value |
|---|---|
| Chemical formula | C₆H₆ClN |
| Molecular weight | 127.57 g/mol |
| Appearance | Pale yellow to amber liquid, characteristic amine odour |
| Melting point | About -2 °C (liquid at room temperature) |
| Boiling point | About 209 °C |
| Density | About 1.213 g/cm³ (20 °C) |
| Flash point | About 108 °C (closed cup) |
| Water solubility | Poor; slightly soluble |
| Incompatibilities | Strong oxidisers and strong acids |
Behaviour in the process
Ortho Chloro Aniline's reactivity pattern is what dye, pharma and agrochemical producers are buying:
- Amine reactivity. The primary aromatic amine group drives diazotisation, acylation and condensation chemistry used in dye and pharmaceutical synthesis.
- Chlorine substituent retained. The chlorine atom remains available for further substitution chemistry downstream.
- Air and light sensitivity. Like most aromatic amines, can darken on prolonged exposure to air and light; store accordingly.
- Liquid at ambient temperature. Handles as a liquid rather than a solid, simplifying metering and charging in continuous processes.
Ortho Chloro Aniline and Related Chloroaniline Intermediates
Choosing between the chloroaniline isomers, and between the aniline and its nitro precursor, comes down to which substitution pattern and which stage of the synthesis your process needs.
| Material | Form / substitution | When it is the right choice |
|---|---|---|
| Ortho Chloro Aniline | Reduced amine, ortho (1,2) | When your process needs the reduced amine directly, in the ortho pattern |
| Meta Nitro Chloro Benzene | Nitro precursor, meta (1,3) | When your process reduces the nitro compound itself, and needs the meta pattern |
| para-Chloroaniline | Reduced amine, para (1,4) | Routes needing the para-substituted amine, e.g. selected rubber-chemical and dye syntheses |
| meta-Chloroaniline | Reduced amine, meta (1,3) | Routes needing m-chloroaniline specifically, made by reducing Meta Nitro Chloro Benzene |
Stated plainly: if your process reduces the nitro precursor itself, you need the chloronitrobenzene; if your process starts from the amine, you need the chloroaniline — and in both cases, the substitution pattern (ortho, meta or para) has to match your target molecule.
Industries We Supply Ortho Chloro Aniline To
Where Ortho Chloro Aniline is Used
In downstream functionalisation
Ortho Chloro Aniline's amine group is the usual point of attack — diazotisation for azo-dye coupling, acylation for amide-based intermediates, or further substitution chemistry exploiting the adjacent chlorine. Because it is already a liquid amine rather than a nitro-aromatic solid, it slots directly into continuous dosing and reaction steps without a separate reduction stage on your line.
Need a specific purity or colour grade?
Tell us the purity and colour 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 and colour reported alongside the main assay because meta- and para-chloroaniline carryover and colour drift affect downstream dye shade and reaction performance.
- o-Chloroaniline content — by GC assay, the primary grade measure.
- Colour — checked on every batch, since discoloration signals oxidation or ageing.
- Isomer purity — meta- and para-chloroaniline carryover, reported because it affects downstream chemistry and dye shade.
- Moisture content — measured because moisture can affect downstream reaction yield.
Common Process Problems & Likely Causes
| Symptom | Likely cause | What to check |
|---|---|---|
| Off-shade dye product | Isomer carryover or colour drift in feedstock | Colour and isomer-purity figures on the COA |
| Dark/discoloured incoming material | Oxidation from extended storage or air/light exposure | Storage conditions and time since manufacture |
| Poor diazotisation yield | Moisture or trace impurities | Moisture content and assay on the COA |
Packaging, Storage & Shipping
- Standard packing. MS drums or HDPE/lined drums, typically 170 – 250 kg net, with ISO tank/flexitank options on contract supply.
- Headspace & sealing. Keep containers tightly sealed and minimise headspace exposure to air and light.
- Temperature control. Store in a cool, dry, well-ventilated area away from direct sun, heat and ignition sources.
- Material compatibility. Avoid contact with strong oxidisers and strong acids; do not transport with food and feedstuffs.
- Transport classification. UN 2019, "Chloroanilines, liquid", Class 6.1 (toxic), Packing Group II.
Hazards & Safe Handling
Ortho Chloro Aniline is harmful if swallowed, in contact with skin or if inhaled, causes serious eye irritation, is suspected of causing genetic defects, is suspected of damaging fertility or the unborn child, and may cause damage to organs through prolonged or repeated exposure; it is also toxic to aquatic life, with long-lasting effects. Standard precautions for a toxic aromatic amine and good laboratory and plant practice apply throughout handling.
- Skin and eye contact. Chemical-resistant gloves and goggles are essential — the material is absorbed through skin and irritates eyes; rinse thoroughly with water on contact.
- Inhalation. Use adequate ventilation; the liquid has measurable vapour pressure at room temperature.
- PPE. Chemical-resistant gloves, safety goggles or a face shield, and a suitable respirator where ventilation is limited.
- Environment. Toxic to aquatic organisms with long-lasting effects; avoid uncontrolled release to water and follow local effluent rules.
Regulatory & Compliance Notes
Ortho Chloro Aniline is a registered chloroaniline intermediate. Because obligations differ by territory and use, the notes below are orientation rather than legal advice.
- GHS classification. Reported as harmful if swallowed, in contact with skin or if inhaled; causes serious eye irritation; suspected of causing genetic defects and of damaging fertility or the unborn child; may cause organ damage through repeated exposure; toxic to aquatic life with long-lasting effects (Signal word: Danger) — the SDS carries the full hazard statements for your grade.
- REACH and chemical inventories. Registered under EU REACH and listed on major chemical inventories; confirm the EC number for your specific regulatory filing, as sources show minor variation for this entry.
- Dangerous goods transport. UN 2019, Class 6.1, Packing Group II, under the "chloroanilines, liquid" group entry — confirm with your logistics/EHS team against your current SDS before shipping.
- HS code. Internationally classified under HS heading 2921.42 (chloroaniline and their derivatives; salts thereof); confirm the exact national tariff subheading with your customs broker.
We Supply Ortho Chloro Aniline Across All Seven Continents
Chelora Chemicals is a supplier and export partner, not a single-plant trader. We ship Ortho Chloro Aniline from India and from partner sources to customers across every inhabited continent, 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 Ortho Chloro Aniline from Chelora
We are an independent sourcing and supply partner. For this product that means settling three things at enquiry: the purity and colour grade your application needs, the packing format, and the quantity you are buying.
- Documentation on every lot. Batch-specific COA with assay, colour 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 intermediates. Meta Nitro Chloro Benzene and other chloronitrobenzene/chloroaniline isomers alongside this product from one supplier.
How ordering works
- Send the enquiry. Purity, colour 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 pharma/dye-grade applications, we share the analysis so your technical team can sign off before you commit.
- Confirm transport classification. We work with you and your logistics team to confirm the UN number and transport class for your lane.
- 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.
Ortho Chloro Aniline — Common Questions
The questions our technical desk is asked most often about Ortho Chloro Aniline. If yours isn't here, call or email and you will reach someone who knows the chemistry.
What is the CAS number of Ortho Chloro Aniline?
The CAS number is 95-51-2. Its molecular formula is C₆H₆ClN with a molecular weight of 127.57 g/mol.
What is Ortho Chloro Aniline used for?
It is used as a building block across azo-dye and pigment synthesis, pharmaceutical intermediates, agrochemical actives and selected rubber-chemical syntheses requiring the ortho-chloroaniline substitution pattern.
Do you supply Ortho Chloro Aniline worldwide?
Yes. Chelora Chemicals supplies and exports Ortho Chloro Aniline worldwide — across Asia, Europe, Africa, North America, South America and Australia & Oceania, as well as throughout India. Every consignment carries the COA and SDS.
Is Ortho Chloro Aniline a solid or a liquid?
It is a liquid at room temperature, with a melting point around -2 °C, unlike the solid chloronitrobenzene it is produced from.
How is Ortho Chloro Aniline manufactured?
By nitrating chlorobenzene to give ortho-chloronitrobenzene (after separating it from the co-produced para-isomer), then reducing it, typically by catalytic hydrogenation, to give ortho-chloroaniline.
Is Ortho Chloro Aniline hazardous?
Yes. It is harmful if swallowed, in contact with skin or if inhaled; causes serious eye irritation; is suspected of causing genetic defects and of damaging fertility or the unborn child; may cause organ damage on repeated exposure; and is toxic to aquatic life with long-lasting effects. Refer to the current SDS for your grade for the complete classification.
What is the UN number and transport classification?
UN 2019, under the "chloroanilines, liquid" group entry, Class 6.1 (toxic), Packing Group II.
What are the boiling point, melting point and density?
Typical figures are a boiling point around 209 °C, a melting point around -2 °C, a density around 1.213 g/cm³ and a flash point around 108 °C (closed cup). Confirm against your own supplier's COA for batch-specific figures.
How should Ortho Chloro Aniline be stored?
In tightly sealed containers, cool, dry and away from direct sun, heat, ignition sources, strong oxidisers and strong acids. Minimise headspace exposure to air and light, and do not transport or store with food and feedstuffs.
What purity grades do you offer?
Standard commercial grade is 99% minimum by GC assay, with colour, isomer purity (versus the meta- and para-isomers) and moisture content reported on the COA.
Ready to source Ortho Chloro Aniline?
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.