3,4-Dichloroaniline
A doubly chlorinated aromatic amine, supplied as a diazo component for azo dye, pigment and agrochemical intermediate manufacture.
What is 3,4-Dichloroaniline?
3,4-Dichloroaniline is a beige to brown crystalline solid built on a benzene ring carrying a primary amine at C-1 and chlorine atoms at the adjacent C-3 and C-4 positions.
That combination is the reason the molecule is such a widely used diazo component. The amine diazotises cleanly under standard acidic conditions, and the two chlorines moderate the ring's electron density, giving a diazonium salt with the coupling behaviour needed to build the azo chromophores that anchor many dye and pigment structures.
At Chelora Dyes, 3,4-Dichloroaniline is crystallised and dried to a controlled particle profile and low moisture, so diazotisation and coupling reactions downstream run cleanly and give consistent, reproducible results batch to batch.
- Appearance
- Beige to brown solid
- Odour
- Faint, amine-like
- Solubility
- Benzene, alcohol
- Function
- Diazo component
- Grade
- Technical / dye
Ortho-dichlorinated aniline
- Molecular formulaC6H5Cl2N
- Molecular weight162.02 g/mol
- IUPAC name3,4-Dichloroaniline
- Functional groupsAromatic amine, two aryl chloride
- CAS number95-76-1
Technical product information
Standard specification for Chelora Dyes' technical grade 3,4-Dichloroaniline. Custom-grade and bulk specifications are available on request.
| Chemical name | 3,4-Dichloroaniline |
|---|---|
| Synonyms | 1-Amino-3,4-dichlorobenzene, 3,4-DCA, 34DCA |
| CAS number | 95-76-1 |
| Molecular formula | C6H5Cl2N |
| Molecular weight | 162.02 g/mol |
| Assay (purity) | ≥ 98.0% |
| Appearance | Beige to brown crystalline solid or flakes |
| Melting point | 69–72°C |
| Moisture content | ≤ 0.5% |
| Insoluble matter | ≤ 0.2% |
| Solubility | Slightly soluble in water; soluble in benzene and alcohol |
| Packaging | 25 kg / 50 kg bags, 500–1000 kg jumbo bags |
| Shelf life | 24 months in sealed original packaging |
Applications of 3,4-Dichloroaniline
Azo dye diazo component
Diazotised and coupled with active-methylene or phenolic partners to build azo dye chromophores.
Pigment synthesis
A common diazo building block for widely used yellow, orange and red organic pigments.
Dye & pigment chemistry
Feeds intermediates used across dye, pigment and specialty colourant manufacture.
Agrochemical intermediates
A precursor in the manufacture of certain herbicide active ingredients.
Analytical reagents
Used as a reference reagent in analytical and laboratory-scale synthesis work.
Custom synthesis
Supplied to order for custom manufacturing and contract synthesis projects.
Why choose Chelora Dyes
Consistent purity
Assay controlled at ≥98% with moisture and colour verified before dispatch.
Full documentation
COA, SDS, and regulatory data supplied with every shipment.
Flexible volumes
From 25 kg bags to jumbo-bag bulk quantities.
Technical support
Process, diazotisation, and compliance guidance from our chemistry team.
Storage and guidelines
- Store in tightly sealed original packaging, protected from light.
- Keep in a cool, dry, well-ventilated area away from direct sunlight and heat.
- Segregate strictly from strong oxidising agents, acids and acid chlorides.
- Protect from moisture pickup, as the material darkens on prolonged storage.
- Use compatible containers: lined HDPE bags or drums.
- Re-seal bags promptly after use to preserve assay specification.
Handling precautions
3,4-Dichloroaniline is classified as toxic by inhalation, in contact with skin and if swallowed, and can cause serious eye damage; contact should be strictly avoided.
Use closed handling equipment, dust and vapour extraction, and full PPE including chemically resistant gloves, goggles and, where indicated by the risk assessment, respiratory protection during weighing, charging and any bulk handling operation.
Keep away from strong oxidisers, acids, acid chlorides and acid anhydrides.
Refer to the full Safety Data Sheet for exposure limits, spill containment, disposal, and first-aid measures before use.
Frequently asked questions
What is 3,4-Dichloroaniline used for?
3,4-Dichloroaniline is used as a diazo component in dye and pigment manufacture, where the amine is diazotised and coupled to build azo chromophores. It is also a key intermediate in the production of certain agrochemical actives.
Why is the amine on this aniline useful for diazotisation?
The two chlorine substituents moderate the electron density of the ring, giving a primary amine that diazotises predictably under standard acidic conditions to form a diazonium salt suited to azo coupling.
Is 3,4-Dichloroaniline soluble in water?
It is only slightly soluble in water. It is more soluble in organic solvents such as benzene and alcohol, so diazotisation and coupling reactions are generally run in an acidic aqueous system with the amine dispersed or partially dissolved.
What purity do you supply?
Standard technical grade is supplied at a minimum assay of 98%, with moisture and melting range held within tight limits. Higher assay grades can be manufactured to order.
What packaging sizes are available?
25 kg and 50 kg multiwall paper or HDPE-lined bags, with bulk supply available in 500 kg and 1000 kg jumbo bags.
How should it be stored, and for how long?
In sealed original packaging in a cool, dark, dry store away from strong oxidising agents, acids and acid chlorides. Shelf life is 24 months from manufacture when storage conditions are maintained.
Is it hazardous to handle?
It is classified as toxic and corrosive to eyes, with aquatic toxicity, and must be handled strictly according to its Safety Data Sheet, with closed handling, dedicated PPE and adequate ventilation.
Do you provide a Certificate of Analysis?
Yes. Each batch ships with a Certificate of Analysis and Safety Data Sheet covering assay, moisture, appearance and melting point.
