Ortho Chloroaniline
A high-purity chloro-substituted aniline, supplied as Ortho Chloroaniline (OCA), used as a diazo component across the azo dye, pigment and agrochemical industries.
What is Ortho Chloroaniline?
Ortho Chloroaniline, abbreviated OCA, is a clear pale yellow to brown liquid built on a benzene ring carrying a chlorine atom ortho to the primary amino group, with a characteristic ammonia-like odour. It darkens on exposure to air.
Its primary industrial role is as a diazo component: the amino group is readily diazotised and coupled to build azo dyes and pigments, and OCA is also a recognised building block for certain herbicide and pharmaceutical intermediates, sitting alongside other anilines used elsewhere in dye and pigment manufacture.
At Chelora Dyes, ortho chloroaniline is distilled and stabilised to a controlled colour and moisture specification, so downstream diazotisation and coupling reactions run cleanly and give a consistent, reproducible feedstock batch to batch.
- Appearance
- Pale yellow to brown liquid
- Odour
- Ammonia-like
- Solubility
- Acids, most organic solvents
- Function
- Diazo component
- Grade
- Technical / dye grade
Benzene ring with ortho amino and chloro groups
- Molecular formulaC6H6ClN
- Molecular weight127.57 g/mol
- IUPAC name2-Chloroaniline
- Functional groupsPrimary amine, aryl chloride
- CAS number95-51-2
Technical product information
Standard specification for Chelora Dyes' technical grade Ortho Chloroaniline. Custom-grade and bulk specifications are available on request.
| Chemical name | Ortho Chloroaniline |
|---|---|
| Synonyms | OCA, o-Chloroaniline, 2-Aminochlorobenzene |
| CAS number | 95-51-2 |
| Molecular formula | C6H6ClN |
| Molecular weight | 127.57 g/mol |
| Assay (purity) | ≥ 99.0% |
| Appearance | Clear pale yellow to brown liquid |
| Boiling point | 208–210°C |
| Density (20°C) | 1.21 g/mL |
| Moisture content | ≤ 0.1% |
| Colour (APHA) | ≤ 40 |
| Solubility | Almost insoluble in water; soluble in acids and most common organic solvents |
| Packaging | 200 kg / 225 kg drums, 1000 L IBC totes, ISO tank / bulk tanker |
| Shelf life | 24 months in sealed original packaging |
Applications of Ortho Chloroaniline
Azo dye synthesis
Diazotised and coupled to produce Fast Yellow GC base and related azo dyes.
Pigment intermediates
Underpins azo pigment routes used across printing inks and textile colourants.
Herbicide intermediates
Building block for certain phenylurea-class herbicide active ingredients.
Pharmaceutical intermediates
Precursor used in the synthesis of select pharmaceutical actives.
Fast Base / Fast Salt production
Precursor to diazonium salts used as fast colour bases in the dye trade.
Analytical reagents
Used as a reference reagent in analytical and research-scale organic chemistry.
Why choose Chelora Dyes
Consistent purity
Assay controlled at ≥99% with moisture and colour verified before dispatch.
Full documentation
COA, SDS, and regulatory data supplied with every shipment.
Flexible volumes
From drums to IBC totes, ISO tanks and bulk tanker.
Technical support
Process, diazotisation, and compliance guidance from our chemistry team.
Storage and guidelines
- Store in tightly sealed original drums, totes or tanks in a dry environment.
- Keep in a cool, dry, well-ventilated area away from direct sunlight and heat sources.
- Keep containers closed when not in use to limit air exposure and darkening.
- Segregate from strong oxidising agents and combustible materials.
- Use compatible containers: steel or lined drums, totes and tanks.
- Re-seal containers promptly after use and follow site procedures for toxic-liquid handling.
Handling precautions
Ortho Chloroaniline is toxic if swallowed, inhaled or absorbed through the skin, so it should be handled only with appropriate PPE and, where practical, closed-system transfer.
Use chemically resistant gloves, eye and face protection, and adequate ventilation during transfer, charging, and any bulk handling operation.
Keep away from open flame and sources of ignition, and away from strong oxidisers. The substance is also classified as hazardous to aquatic life, so avoid release to drains or watercourses.
Refer to the full Safety Data Sheet for exposure limits, monitoring requirements, spill containment, disposal, and first-aid measures before use.
Frequently asked questions
What is Ortho Chloroaniline used for?
Ortho Chloroaniline is chiefly used as a diazo component in the manufacture of azo dyes and pigments, and as an intermediate in some agrochemical and pharmaceutical syntheses.
Is Ortho Chloroaniline soluble in water?
It is almost insoluble in water but is soluble in acids and most common organic solvents.
What purity do you supply?
Standard technical grade is supplied at a minimum assay of 99.0%, with moisture and colour held within tight limits.
How is Ortho Chloroaniline packaged and shipped?
As a liquid, it is supplied in 200 kg / 225 kg net drums, with bulk supply available in 1000 L IBC totes, ISO tank containers or rail/road tanker for large volumes.
How should it be stored, and for how long?
In tightly sealed original containers or tanks in a cool, dry, well-ventilated store away from direct sunlight, heat, and strong oxidising agents. Shelf life is 24 months from manufacture when storage conditions are maintained.
Is it hazardous to handle?
Ortho Chloroaniline is toxic if swallowed, inhaled or absorbed through the skin, and is classified as hazardous to aquatic life. It should be handled only with appropriate PPE and adequate ventilation. Review the Safety Data Sheet before any handling operation.
Do you provide a Certificate of Analysis?
Yes. Each batch ships with a Certificate of Analysis and Safety Data Sheet covering assay, moisture, colour and density.
