2,4-Dinitroaniline
A high-purity dinitro-substituted aniline, supplied as 2,4-dinitroaniline (24DNA) for use as a diazo component across pigment and dye manufacture.
What is 2,4-Dinitroaniline?
2,4-Dinitroaniline, abbreviated 24DNA, is a yellow to orange-yellow crystalline powder built on an aniline ring carrying an amino group at C-1 and two nitro groups at the C-2 and C-4 positions.
That arrangement is the reason the molecule is valuable. The amino group is diazotized to form a diazonium salt, and the two electron-withdrawing nitro groups stabilise that salt while pulling the resulting azo chromophore toward deeper, more bathochromic shades once it is coupled to a partner component — giving pigments and dyes their characteristic depth of shade and lightfastness.
At Chelora Dyes, 24DNA is crystallised and dried to a controlled particle profile and low moisture, so diazotization and coupling reactions downstream run cleanly and give a consistent, reproducible shade batch to batch.
- Appearance
- Yellow / orange-yellow
- Odour
- Faint, characteristic
- Solubility
- Acetone, ethanol, benzene
- Function
- Diazo component
- Grade
- Technical / pigment
Aniline ring with amino and two nitro substituents
- Molecular formulaC6H5N3O4
- Molecular weight183.12 g/mol
- IUPAC name2,4-Dinitroaniline
- Functional groupsPrimary amine, nitro (x2)
- CAS number97-02-9
Technical product information
Standard specification for Chelora Dyes' technical grade 2,4-Dinitroaniline. Custom-grade and bulk specifications are available on request.
| Chemical name | 2,4-Dinitroaniline |
|---|---|
| Synonyms | 24DNA, 2,4-Dinitrobenzenamine, 2,4-DNA |
| CAS number | 97-02-9 |
| Molecular formula | C6H5N3O4 |
| Molecular weight | 183.12 g/mol |
| Assay (purity) | ≥ 98.0% |
| Appearance | Yellow to orange-yellow crystalline powder |
| Melting point | 188–192°C |
| Moisture content | ≤ 0.5% |
| Insoluble matter | ≤ 0.2% |
| Solubility | Sparingly soluble in water; soluble in acetone, ethanol and hot benzene |
| Packaging | 25 kg / 50 kg bags, 500–1000 kg jumbo bags |
| Shelf life | 24 months in sealed original packaging |
Applications of 2,4-Dinitroaniline
Azo pigment synthesis
Diazotized and coupled to build yellow, orange and red azo pigments used across printing inks and plastics.
Disperse & solvent dyes
Used as a diazo component in disperse and solvent dye chemistry for polyester and synthetic fibre dyeing.
Pigment dispersions
Feeds into pigment intermediates used in masterbatch, coatings and printing ink formulation.
Fine chemical intermediates
Supplies a nitro-substituted aniline core for further condensation and heterocycle chemistry.
Rubber & corrosion-inhibitor intermediates
Applied in smaller volumes as a building block for specialty rubber and anti-corrosion chemical synthesis.
Analytical reagents
Used as a reference and diazo reagent in analytical and research-scale dye chemistry.
Why choose Chelora Dyes
Consistent purity
Assay controlled at ≥98% with moisture 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-bag bulk quantities.
Technical support
Process, diazotization, 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 sources.
- Protect from moisture pickup — the powder can cake if exposed to humid air.
- Segregate from strong oxidising agents, reducing agents and combustible materials.
- Use compatible containers: lined HDPE bags or drums.
- Re-seal bags promptly after use to preserve moisture and assay specification.
Handling precautions
2,4-Dinitroaniline is a fine crystalline powder that can cause irritation to skin and eyes, and is harmful if swallowed or inhaled.
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. Keep away from open flame and sources of ignition.
Refer to the full Safety Data Sheet for exposure limits, spill containment, disposal, and first-aid measures before use.
Frequently asked questions
What is 2,4-Dinitroaniline used for?
2,4-Dinitroaniline is diazotized and used as a diazo component in the synthesis of azo dyes and pigments, contributing to yellow, orange and red shades used in pigments, disperse dyes and printing inks.
Why does the dinitro substitution pattern matter?
The two nitro groups at the 2 and 4 positions strongly withdraw electron density from the ring, which stabilises the diazonium salt formed on diazotization and shifts the resulting azo chromophore toward deeper, more bathochromic shades with good fastness.
Is 2,4-Dinitroaniline soluble in water?
It is only sparingly soluble in water. It dissolves more readily in organic solvents such as acetone, ethanol and hot benzene, and diazotization is normally carried out under acidic aqueous conditions with fine suspension.
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 for sensitive pigment applications.
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 oxidisers, reducing agents and open flame. Shelf life is 24 months from manufacture when storage conditions are maintained.
Is it hazardous to handle?
It is classified as harmful if swallowed or inhaled and can cause skin and eye irritation, so it should be handled with 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, melting range and appearance.
