5-Nitro-o-toluidine

  • 2-Methyl-5-nitroaniline
  • 2-Amino-4-nitrotoluene
  • Scarlet g base
Formula
C7H8N2O2
Structure
Description
Bright yellow powder.
Uses
Chemical intermediate for pigments-eg, ci pigment red 22 & dyes-eg, azoic diazo component.

Registry Numbers and Inventories.
CAS
99-55-8
EC (EINECS/ELINCS)
202-765-8
EC Index Number
612-210-00-5
R 23/24/25 33 51/53
S 28 36/37 45 61
RTECS
XU8225000
RTECS class
Tumorigen; Mutagen
UN (DOT)
2660
Beilstein/Gmelin
879021
Beilstein Reference
4-12-00-01807
RCRA
U181
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H8N2O2
Formula mass
152.17
Melting point, °C
108
Vapor pressure, mmHg
1E-5
Density
1.365 g/cm3 (15 C)
Solubility in water
Insoluble
Partition coefficient, pKow
1.96

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 only in a well ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Do not ingest or inhale. Wash clothing before reuse.
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
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation. Cover with dry earth, dry sand, or other non-combustible material followed with plastic sheet to minimize spreading and contact with water.
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Strong oxidizing agents, acids, acid anhydrides, chloroformates, acid chlorides.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. 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
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH: Potential Occupational Carcinogen.
Exposure effects
May cause methemoglobinemia, which is characterized by chocolate-brown colored blood, headache, weakness, dizziness, breath shortness, cyanosis, rapid heart rate, unconsciousness and possible death. May cause cancer according to animal studies. Laboratory experiments have resulted in mutagenic effects.
   Ingestion
May be harmful if swallowed. Causes gastrointestinal tract irritation.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation. Harmful if absorbed through the skin.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
2660
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
NTN