2,2'-Azobis(2-methylpropionitrile)

  • 2,2'-Azobis(2-cyanopropane)
  • 2,2'-Azobis[2-methylpropanenitrile]
  • 2,2'-Azobis[isobutyronitrile]
  • 2,2'-Dimethyl-2,2'-azodipropionitrile
  • Azodiisobutyronitrile
  • Azobisisobutyronitrile
Formula
NC(CH3)2CN=NC(CH3)2CN
Structure
Description
White solid.

Registry Numbers and Inventories.
CAS
78-67-1
EC (EINECS/ELINCS)
201-132-3
EC Index Number
608-019-00-1
EC Class
Explosive; Highly flammable; Harmful; Dangerous for the Environment
R 2 11 20/22 52/53
S 39 41 47.1 61
RTECS
UG0800000
RTECS class
Other
UN (DOT)
2952
Beilstein/Gmelin
1708400
Beilstein Reference
4-04-00-03377
Swiss Giftliste 1
G-3625
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8H12N4
Formula mass
164.21
Melting point, °C
80
Boiling point, °C
236
Vapor pressure, mmHg
0.05 (25 C)
Density
1.08 g/cm3
Solubility in water
Slightly soluble
Partition coefficient, pKow
1.26
Heat of vaporization
47.3 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator/flammables.
Handling
Wash thoroughly after handling. Minimize dust generation and accumulation. Use spark-proof tools and explosion proof equipment. 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
Remove all sources of ignition. DO NOT CLEAN-UP OR DISPOSE OF, EXCEPT UNDER SUPERVISION OF A SPECIALIST.
Stability
Substance is shock sensitive and thermally unstable.
Incompatibilities
Acetone (possible explosive decomposition); Heptane (possible explosion with the addition of heat)
Decomposition
Hydrogen cyanide, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
97
Autoignition, °C
64
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Exposure to heat may promote violent decomposition. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Flammable solid. May be ignited by heat, sparks, and flame. Self-accelerating decomposition may occur if the temperature is not maintained. Material is sensitive to temperature rises. Above a given control temperature they decompose violently and catch fire. May decompose explosively when heated or involved in a fire. Vapors or dust may form explosive mixture with air. May burn violently. Decomposition may be self-accelerated and produce large amounts of gas. Extinguishing media: Use water spray to cool fire-exposed containers. For small fires, use dry chemical, carbon dioxide, water spray or regular foam. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
Self-decomposition or self-ignition may be triggered by heat, chemical reaction, friction or impact. Self-accelerating decomposition may occur if the specific control temperature is not maintained.
Hazards
These materials are particularly sensitive to temperature rises. Above a given Control Temperature they decompose violently and catch fire. May be ignited by heat, sparks or flames. May burn violently. Decomposition may be self-accelerating and produce large amounts of gases. Vapors or dust may form explosive mixtures with air.
Combustion products
May produce irritating, toxic and/or corrosive gases.
Health
3
 
Flammability
3
 
 
Reactivity
3
 

Health.
Poison_Class
1
Exposure effects
   Ingestion
May be fatal if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause liver and kidney damage. May cause degenerative brain changes.
   Inhalation
May cause respiratory tract irritation. Repeated exposure may cause liver damage.
   Skin
May cause skin irritation.
   Eyes
May cause 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 not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   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
2952
Response guide
Hazard class
4.1
HS Code
2927 00 00