2,6-Dichloro-4-nitroaniline
A high-purity substituted nitroaniline supplied as a crop-protection fungicide active and as a diazo component for azo pigment manufacture.
What is 2,6-Dichloro-4-nitroaniline?
2,6-Dichloro-4-nitroaniline — 26DCPNA, known in crop protection as dicloran — is a yellow crystalline powder with chlorines flanking the amino group and a nitro group across the ring.
It is unusual in this range in serving two quite different markets as it stands. In agriculture it is a fungicide active used against botrytis and related storage and field diseases. In colour chemistry it is a diazo component whose heavy substitution gives pigments strong shade and good fastness.
At Chelora Chemicals, 26DCPNA is crystallised and refined with assay, melting range, and moisture held to specification, at a quality suitable for both formulation and pigment use.
- Appearance
- Yellow crystalline powder
- Odour
- Faint, characteristic
- Solubility
- Practically insoluble in water; soluble in acetone and polar organics
- Function
- Fungicide active / pigment intermediate
- Grade
- Technical
Formula diagram
Aniline flanked by chlorines with a para nitro group
- Molecular formulaC6H4Cl2N2O2
- Molecular weight207.01 g/mol
- IUPAC name2,6-Dichloro-4-nitroaniline
- Functional groupsPrimary aromatic amine, nitro, aryl chloride
- CAS number99-30-9
Technical product information
Standard specification for Chelora Chemicals' technical grade 2,6-Dichloro-4-nitroaniline. Custom-grade and bulk specifications are available on request.
| Chemical name | 2,6-Dichloro-4-nitroaniline |
|---|---|
| Synonyms | 26DCPNA, Dicloran, DCNA, 2,6-Dichloro-p-nitroaniline |
| CAS number | 99-30-9 |
| Molecular formula | C6H4Cl2N2O2 |
| Molecular weight | 207.01 g/mol |
| Assay (purity) | ≥ 98.0% |
| Appearance | Yellow crystalline powder |
| Melting point | 191–195°C |
| Isomer content | ≤ 0.5% |
| Moisture | ≤ 0.5% |
| Residue on ignition | ≤ 0.2% |
| Packaging | 25 kg bags, 500 kg jumbo bags |
| Shelf life | 24 months from date of manufacture |
Applications of 2,6-Dichloro-4-nitroaniline
Fungicide active
Formulated as a contact fungicide for botrytis and related field and post-harvest diseases, where registered.
Crop-protection formulation
Supplied as technical material for wettable powder, suspension concentrate, and dust formulations.
Azo pigments
Diazotised as a heavily substituted colour component giving strong, fast shades.
Dye intermediates
Applied in azo dye chemistry requiring a dichlorinated nitroaniline base.
Pharmaceutical intermediates
Used where a multiply substituted aniline core is needed in fine chemical synthesis.
Analytical standards
Supplied as a reference material for residue and impurity testing.
Why choose Chelora Chemicals
Every batch of 2,6-Dichloro-4-nitroaniline 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 ≥98% 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 500 kg jumbo bags and full container loads.
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.
- 02Keep away from heat, ignition sources, and direct sunlight.
- 03Segregate from strong oxidising agents, acids, and reducing agents.
- 04Keep bags palletised and dry; avoid dust generation and mechanical damage.
- 05Store away from food, feed, seed, and drinking water, in a locked or access-controlled area.
- 06Prevent release to drains, surface water, and soil.
Handling precautions
26DCPNA is harmful if swallowed or inhaled and is suspected of causing cancer. It is for industrial use by trained personnel only.
Substituted nitroanilines can be 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, milling, and formulation, and use local exhaust ventilation at all transfer points.
The product is very toxic to aquatic organisms with long-lasting effects. Contain all spills and dispose of waste through licensed routes.
Where the material is used as a pesticide active, registration status varies considerably between countries and some markets have withdrawn approval. Confirm the regulatory position in your market before purchase or use.
Refer to the full Safety Data Sheet for exposure limits, spill response, and first-aid measures before use.
Frequently asked questions
What is 2,6-Dichloro-4-nitroaniline used for?
Two distinct markets. In crop protection it is the fungicide active known as dicloran, used against botrytis and related diseases. In colour chemistry it is a diazo component for azo pigments and dyes.
Is it sold as a finished product or an intermediate?
Both, depending on the buyer. Formulators use it as a technical active and process it into wettable powders and suspension concentrates; pigment manufacturers use it as an intermediate to be diazotised and coupled.
Why does the heavy substitution matter for pigments?
Chlorines flanking the amine and a nitro group across the ring make the resulting azo pigment less soluble and more resistant to light and solvents. That translates into stronger shade retention and better fastness in the finished colour.
How does it differ from other nitroanilines in this range?
It carries three substituents rather than one or two. Compared with a simple nitroaniline, the two ortho chlorines both hinder the amine sterically and lower its basicity, so diazotisation conditions differ.
Is dicloran still registered as a pesticide?
Registration status varies by country and has changed over time, with approval withdrawn in some markets. Confirm the current position in your jurisdiction before purchasing for crop-protection use.
Is it soluble in water?
Practically insoluble. It dissolves in acetone, DMF, and other polar organic solvents, and in dilute mineral acid for diazotisation.
What purity do you supply?
Standard technical grade is supplied at a minimum assay of 98% with isomer content at or below 0.5% and moisture at or below 0.5%. Tighter specifications can be produced for formulation or pigment use.
What packaging sizes are available?
25 kg bags and 500 kg jumbo bags, with full container loads for bulk users. Samples are available for formulation and shade trials.
Is 26DCPNA hazardous?
Yes. It is harmful by ingestion and inhalation, suspected of causing cancer, and very toxic to aquatic life with long-lasting effects. Dust control, PPE, and containment are required per the Safety Data Sheet.
Why is it stored away from food and feed?
Because it is a pesticide active as well as a chemical intermediate. Segregation from food, feed, seed, and drinking water is a standard requirement for agrochemical actives and is often a legal one.
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.