o-Nitrotoluene

  • 2-Methylnitrobenzene
  • Methylnitrobenzene
  • 1-Methyl-2-nitrobenzene
  • 2-Nitrotoluene
Formula
2-(NO2)C6H4CH3
Structure
Description
Yellow liquid with an almond-like odor.
Uses
For production of toluidine, tolidine, fuchsine, and various synthetic dyes.

Registry Numbers and Inventories.
CAS
88-72-2
EC (EINECS/ELINCS)
201-853-3
EC Index Number
609-006-00-3
EC Class
Toxic; Danger of cumulative effects; Dangerous for the Environment
R 23/24/25 33 51/53
S 28 37 45 61
RTECS
XT3150000
RTECS class
Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
1664
Merck
12,6748
Beilstein/Gmelin
1907580
Beilstein Reference
4-05-00-00845
Swiss Giftliste 1
G-2659
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H7NO2
Formula mass
137.14
Melting point, °C
-4 - -3
Boiling point, °C
221.7
Decomposition point, °C
270
Vapor pressure, mmHg
0.29 (25 C)
Vapor density (air=1)
4.72
Saturation Concentration
0.01% (20 C)
Odor Threshold Odor threshold 0.05 mg/L
Density
1.163 g/cm3 (20 C)
Solubility in water
0.7 g/L
Viscosity
2.141 cp (25 C)
Surface tension
41.76 g/s2 (20 C)
Refractive index
1.5450 (20 C)
Dipole moment
3.9 D
Dielectric constant
26.1 (25 C)
Partition coefficient, pKow
2.30
Heat of fusion
15.0 kJ/mol
Heat of vaporization
59.1 kJ/mol
Heat of combustion
-3597 kJ/mol

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
D1A
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale.
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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Provide ventilation.
Disposal code
9
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.

Fire.
Flash Point,°C
106
Autoignition, °C
420
Upper exp. limit, %
8.8
Lower exp. limit, %
1.47
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. Use water spray to keep fire-exposed containers cool. Containers may explode when heated. Extinguishing media: Use water spray to cool fire-exposed containers. Do NOT use straight streams of water. For small fires, use dry chemical, carbon dioxide, or water spray. For large fires, use water spray, fog or regular foam.
Fire potential
Moderately flammable. Combustible.
Hazards
Containers may explode when heated.
Combustion products
Toxic fumes may be generated.
Health
3
 
Flammability
1
 
 
Reactivity
1
 

Health.
Exposure limit(s)
TLV (as TWA): 2 ppm; 11 mg/m3 (skin) (ACGIH 1991-1992). OSHA PEL: TWA 5 ppm (30 mg/m3) skin NIOSH REL: TWA 2 ppm (11 mg/m3) skin NIOSH IDLH: 200 ppm
Carcinogin
CP65
Poison_Class
3
Exposure effects
CNS effects include headache, dizziness, altered mental status, confusion (lethargy progressing coma), seizures, syncope; occur secondary to CNS hypoxia, usually with levels > 20%.
   Ingestion
Aspiration hazard. May be harmful if swallowed. Causes digestive tract irritation.
   Inhalation
May be fatal if inhaled. Causes respiratory tract irritation. Aspiration may cause respiratory swelling and pneumonitis.
   Skin
Causes mild skin irritation.
   Eyes
Causes mild eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. 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. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1664
Response guide
Hazard class
6.1
Packing Group
II
 
USCG CHRIS Code
NIE
 
42 Nitrocompounds
HS Code
2904 20 00
 
IMO Chemical Code
17
IMO Pollution Category
B
IMO Hazard code
S/P