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  • 1,2-Diamino-4-nitrobenzene
  • p-Nitro-o-phenylenediamine
  • 3,4-Diaminonitrobenzene
  • 4-Nitro-1,2-diaminobenzene
  • o-Phenylenediamine, 4-nitro-2-amino-4-nitroaniline
FormulaC6H7N3O2 (C6H7N3O2)
Description Dark red needles.
Uses 1,2-Diamino-4-nitrobenzene is used in semi-permanent & permanent hair coloring products. It produces brown, red & blond shades on hair. It has typically been used in medium-brown & medium-red dye formulations. It has also been used in bleach-toner formulations for reddish-blond shades

Registry Numbers and Inventories.
EC Classharmful
EC Risk PhraseR 22
ENCS (MITI) 3-402X
RTECS class Tumorigen (C); Mutagen (M); Reproductive Effector (T)
UN (DOT)2811
Beilstein ref.4-13-00-00075
Listed on the Toxic Substancs Control Act (TSCA).
Listed on Canadian Domestic Substances List (DSL).
Listed on Australian Inventory of Chemical Substances (AICS).

Formula mass153.14
Melting point, °C197 - 202
Solubility in waterInsoluble
Partition coefficient, pKow0.88

Hazards and Protection.
Storage Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation.
Protection Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
Stability Stable under normal temperatures and pressures.
Incompatibilities Oxidizing agents.
Decomposition Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, nitrogen.

Fire fighting Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential This material is probably combustible.
Hazards Contact with metals may evolve flammable hydrogen gas.
Combustion products Fire may produce irritating, corrosive and/or toxic gases.

Exposure effectsAbnormally low blood pressure and labored respirations may occur. CNS depression and peripheral neuropathy have been reported after ingestion.
May cause irritation of the digestive tract. May be harmful if swallowed.
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
May cause skin irritation. The toxicological properties of this material have not been fully investigated.
First aid 
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

UN number2811
Response guide
Hazard class6.1
Packing GroupI; II; III

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