2,4-Dichloroaniline
A high-purity chlorinated aromatic amine supplied as flakes for azo dye and pigment manufacture, agrochemical intermediates, and fine chemical synthesis.
What is 2,4-Dichloroaniline?
2,4-Dichloroaniline — 24DCA — is a white to light brown crystalline solid carrying chlorine atoms ortho and para to the amino group. It is produced by reducing 2,4-dichloronitrobenzene.
With both chlorines positioned on the activating pattern of the ring, the amine is less basic than aniline but still couples reliably after diazotisation. The ortho chlorine adds enough steric influence to shift shade and improve fastness in the resulting colours.
At Chelora Chemicals, 24DCA is crystallised and refined with isomer content, melting range, and moisture held to specification, giving dye, pigment, and agrochemical manufacturers reproducible diazotisation and condensation behaviour.
- Appearance
- White to light brown crystalline flakes
- Odour
- Characteristic amine odour
- Solubility
- Slightly soluble in water; soluble in alcohol, ether, dilute acid
- Function
- Chemical intermediate
- Grade
- Technical / dye
Formula diagram
Aniline ring chlorinated at the ortho and para positions
- Molecular formulaC6H5Cl2N
- Molecular weight162.02 g/mol
- IUPAC name2,4-Dichloroaniline
- Functional groupsPrimary aromatic amine, aryl chloride
- CAS number554-00-7
Technical product information
Standard specification for Chelora Chemicals' technical grade 2,4-Dichloroaniline. Custom-grade and bulk specifications are available on request.
| Chemical name | 2,4-Dichloroaniline |
|---|---|
| Synonyms | 24DCA, 2,4-DCA, 1-Amino-2,4-dichlorobenzene |
| CAS number | 554-00-7 |
| Molecular formula | C6H5Cl2N |
| Molecular weight | 162.02 g/mol |
| Assay (purity) | ≥ 99.0% |
| Appearance | White to light brown crystalline flakes |
| Melting point | 61–63°C |
| Boiling point | 245°C |
| Flash point | > 130°C (closed cup) |
| Isomer content | ≤ 0.5% |
| Moisture | ≤ 0.3% |
| Packaging | 25 kg bags, 500 kg jumbo bags, molten tanker |
| Shelf life | 24 months from date of manufacture |
Applications of 2,4-Dichloroaniline
Azo dyes
Diazotised as a colour base for azo dyes with good light and wash fastness.
Organic pigments
Used as a diazo component in yellow, orange, and red pigment manufacture.
Agrochemical intermediates
Converted into amide and urea derivatives used in crop-protection synthesis.
Pharmaceutical intermediates
Provides a dichlorinated aniline core for amide and heterocyclic building blocks.
Specialty chemicals
Applied in biocide, optical brightener, and specialty amine synthesis.
Analytical standards
Supplied as a reference material for chloroaniline testing in environmental analysis.
Why choose Chelora Chemicals
Every batch of 2,4-Dichloroaniline is manufactured, tested, and documented to a standard that formulators and process chemists can build on with confidence — from first sample to full production volume.
Consistent purity
Assay controlled at ≥99% with isomer content and melting range verified before dispatch.
Full documentation
COA, SDS, and regulatory data supplied with every shipment.
Flexible volumes
From 25 kg bags to jumbo bags and molten tanker supply.
Technical support
Process, handling, and compliance guidance from our chemistry team.
Storage and guidelines
- 01Store in tightly closed original packaging in a cool, dry, well-ventilated store.
- 02Protect from air and light — the product darkens on oxidation.
- 03Keep away from heat, ignition sources, and direct sunlight.
- 04Segregate from strong oxidising agents, acids, and acid chlorides.
- 05Keep bags palletised and dry, and re-seal opened packaging promptly.
- 06Prevent any release to drains, surface water, or soil — the product is very toxic to aquatic life.
Handling precautions
24DCA is toxic by inhalation, ingestion, and skin absorption. It is for industrial use by trained personnel only.
Chlorinated anilines are absorbed through intact skin and may affect the blood by forming methaemoglobin. Chemical-resistant gloves, coveralls, eye protection, and respiratory protection are required.
Control dust during bag emptying and charging, and use local exhaust ventilation at all transfer and melting points.
The product is very toxic to aquatic organisms with long-lasting effects. Contain all spills and dispose of waste through licensed chemical waste routes.
Refer to the full Safety Data Sheet for exposure limits, spill response, and first-aid measures before use.
Frequently asked questions
What is 2,4-Dichloroaniline used for?
It is an intermediate for azo dyes and pigments, agrochemical actives, and pharmaceutical building blocks. It is also used as an analytical reference material for chloroaniline testing.
How does 24DCA compare with the 2,5-, 2,6-, and 3,4- isomers?
All four share the formula C6H5Cl2N and a molecular weight of 162.02, and differ only in chlorine placement. That placement decides melting point, basicity, coupling behaviour, and which downstream products are accessible, so the isomers are not interchangeable.
How is it manufactured?
By reducing 2,4-dichloronitrobenzene, usually by catalytic hydrogenation. Isomer purity of the nitro feed carries through directly into the finished amine.
Is it soluble in water?
Only slightly in neutral water. It dissolves readily in alcohols, ether, and dilute mineral acid, and acid dissolution is the usual first step before diazotisation.
Why does the flake darken in storage?
Chlorinated anilines oxidise slowly in air and light, generating coloured surface impurities. Assay is generally unaffected, but sealed, cool, dark storage preserves appearance for colour-sensitive work.
Can it be supplied molten?
Yes, for bulk users. With a melting point around 62°C, molten supply in heated tankers avoids dust exposure and handling losses, but requires dedicated heated lines at the receiving site.
What purity do you supply?
Standard technical grade is supplied at a minimum assay of 99% with isomer content at or below 0.5% and moisture at or below 0.3%. Tighter specifications can be produced to order.
What packaging sizes are available?
25 kg bags, 500 kg jumbo bags, and molten product in heated tankers. Samples are available for shade and coupling trials.
How long can it be stored?
24 months from date of manufacture in sealed original packaging under the recommended conditions. Some surface discolouration may develop without affecting assay.
Is 24DCA hazardous?
Yes. It is acutely toxic by several routes, absorbed through skin, and very toxic to aquatic life with long-lasting effects. Trained personnel, dust control, and full PPE are required per the Safety Data Sheet.
Do you provide a Certificate of Analysis?
Yes. Every batch is dispatched with a Certificate of Analysis and Safety Data Sheet covering assay, isomer content, melting range, moisture, and appearance.