2,5-Dichloronitrobenzene
A dichlorinated nitrobenzene, supplied as 1,4-dichloro-2-nitrobenzene for use as a nitro intermediate across dye intermediate manufacture.
What is 2,5-Dichloronitrobenzene?
2,5-Dichloronitrobenzene, formally 1,4-dichloro-2-nitrobenzene, is a pale yellow crystalline solid built on a benzene ring carrying a nitro group and two chlorine substituents in a fixed relative arrangement.
That arrangement makes the molecule a reliable upstream feedstock. Catalytic or chemical reduction of the nitro group converts it cleanly to the corresponding dichloroaniline, which is the diazo component used further down the synthesis chain to build azo dyes and pigments. The two chlorine atoms carried through from this stage help fix the shade and fastness of the finished colourant.
At Chelora Dyes, 2,5-Dichloronitrobenzene is crystallised and dried to a controlled particle profile and low moisture, so reduction reactions downstream run cleanly and give consistent, reproducible results batch to batch.
- Appearance
- Pale yellow crystalline
- Odour
- Faint, characteristic
- Solubility
- Alcohol, benzene, ether
- Function
- Nitro reduction feedstock
- Grade
- Technical / dye
Dichlorinated nitrobenzene
- Molecular formulaC6H3Cl2NO2
- Molecular weight192.00 g/mol
- IUPAC name1,4-Dichloro-2-nitrobenzene
- Functional groupsNitro, two aryl chloride
- CAS number89-61-2
Technical product information
Standard specification for Chelora Dyes' technical grade 2,5-Dichloronitrobenzene. Custom-grade and bulk specifications are available on request.
| Chemical name | 2,5-Dichloronitrobenzene |
|---|---|
| Synonyms | 1,4-Dichloro-2-nitrobenzene, 25DCNB |
| CAS number | 89-61-2 |
| Molecular formula | C6H3Cl2NO2 |
| Molecular weight | 192.00 g/mol |
| Assay (purity) | ≥ 98.0% |
| Appearance | Pale yellow crystalline solid |
| Melting point | 54–57°C |
| Moisture content | ≤ 0.5% |
| Insoluble matter | ≤ 0.2% |
| Solubility | Practically insoluble in water; soluble in alcohol, benzene and ether |
| Packaging | 25 kg / 50 kg bags, 500–1000 kg jumbo bags |
| Shelf life | 24 months in sealed original packaging |
Applications of 2,5-Dichloronitrobenzene
Dichloroaniline synthesis
Reduced to 2,5-dichloroaniline, the corresponding diazo component used in azo dye and pigment manufacture.
Dye intermediate chemistry
Feeds nitro-reduction routes toward chlorinated aniline intermediates used across dye manufacture.
Pigment precursor chemistry
Serves as an upstream feedstock for chlorinated azo pigment intermediates.
Fine chemical intermediates
Supplies a dichlorinated nitrobenzene core for further substitution and reduction chemistry.
Agrochemical intermediates
Used in smaller volumes as a building block toward specialty agrochemical intermediates.
Analytical reagents
Used as a reference compound in analytical and laboratory-scale synthesis work.
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, reduction chemistry, and compliance guidance from our chemistry team.
Storage and guidelines
- Store in tightly sealed original packaging in a dry environment.
- Keep in a cool, dry, well-ventilated area away from direct sunlight and heat.
- Segregate from strong reducing agents and combustible materials.
- Protect from moisture pickup and avoid contact with incompatible metals.
- Use compatible containers: lined HDPE bags or drums.
- Re-seal bags promptly after use to preserve assay specification.
Handling precautions
2,5-Dichloronitrobenzene is an irritant to skin, eyes and the respiratory tract and is harmful to aquatic life; contact and environmental release should be avoided.
Use dust control measures, chemically resistant gloves, and eye protection during weighing, charging, and any bulk handling operation.
Provide local exhaust ventilation where dust generation is likely, and avoid breathing dust.
Refer to the full Safety Data Sheet for exposure limits, spill containment, disposal, and first-aid measures before use.
Frequently asked questions
What is 2,5-Dichloronitrobenzene used for?
2,5-Dichloronitrobenzene is used as a nitro intermediate in dye manufacture; it is typically reduced to the corresponding 2,5-dichloroaniline, which is then diazotized and coupled to build azo dyes and pigments.
How is 2,5-Dichloronitrobenzene related to 2,5-Dichloroaniline?
Reduction of the nitro group on 2,5-Dichloronitrobenzene gives 2,5-dichloroaniline directly; the nitro compound is the upstream intermediate from which the amine diazo component is produced.
Is 2,5-Dichloronitrobenzene soluble in water?
It is practically insoluble in water. It dissolves in common organic solvents such as alcohol, benzene and ether, which is why reduction reactions are typically carried out in an organic solvent or mixed system.
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, dry, ventilated store away from strong reducing agents and combustible materials. Shelf life is 24 months from manufacture when storage conditions are maintained.
Is it hazardous to handle?
It is an irritant with aquatic toxicity considerations and should be handled with standard PPE, dust control 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, appearance and melting point.
