4,4'-AZOBIS(4-CYANOVALERIC ACID)

4,4'-AZOBIS(4-CYANOVALERIC ACID)
PRODUCT IDENTIFICATION
CAS NO.	2638-94-0
EINECS NO.	220-135-0
FORMULA	[=NC(CH₃)(CN)CH₂CH₂CO₂H]₂
MOL WT.	280.28
H.S. CODE
TOXICITY
SYNONYMS	4,4'-Azobis-4-cyanovaleric acid;
cis-4,4'-Azobis(4-cyanovaleric acid);
4,4'-azobis[4-cyano-Pentanoic acid; Azobis(cyanovaleric acid); 4,4'-azobis(4- cyano-Valeric acid; Kyselina 4,4'-azo-bis-(4-kyanvalerova); 4,4-Azobis-4-cyano Valeric acid;
SMILES
CLASSIFICATION
PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE	white powder
MELTING POINT	110 - 120 C (Decomposes)
BOILING POINT
SPECIFIC GRAVITY
SOLUBILITY IN WATER	Solublle
AUTOIGNITION
VAPOR DENSITY
FLASH POINT
APPLICATIONS
Polymerization is initiated generally by free radical. There are four types of free radical initiators which initiate polymerization. Peroxides including hydroperoxides (tertiary-butyl hydroperoxide, benzoylperoxide) Azocompound thermal initiators (azoisobutyronitrile) Redoxinitiators (mixture of iron(III) acetylacetonate): free radicals are formed by one-electron transferreactions. Useful in low temperature and emulsion polymerization Photoinitiators (benzoin, benzil dimethylketal) Some Azocompound initiators include: 2,2'-Azobis(2-methylpropionamidine) dihydrochloride (CAS #: 2997-92-4) 2,2'-Azobis(2-methylpropionitrile) (CAS #: 78-67-1) 2,2'-Azobis[2-methylbutanenitrile (CAS #: 13472-08-7) 4,4'-Azobis(4-cyanovaleric acid) (CAS #: 2638-94-0) 2,2'-Azobis(2,4-dimethylvaleronitrile) (CAS #: 4419-11-8) 1,1'-Azobis(cyanocyclohexane) (CAS #: 2094-98-6) 4,4'-Azobis(4-cyanovaleric Acid) (CAS #: 2638-94-0) 1,1'-Azobis(N,N-dimethylformamide) (CAS #: 10465-78-8) 2,2'-Azobis(4-methoxy-2,4-dimethylvaleronitrile) (CAS #: 15545-97-8) 2,2'-Azobis(2-methylbutyronitrile) (CAS #: 13472-08-7) 2,2'-Azobis(2,4,4-trimethylpentane) (CAS #: 39148-34-0) 4,4'-Azobis(4-cyanovaleric acid) is as an initiator of free radical reactions for the production of polymer (polyvinyl chloride, polyacrylonitrile, polyvinyl alcohol and synthetic fibers) and as a blowing agent for plastics and elastomers. It is soluble in water.
SALES SPECIFICATION
APPEARANCE	white crystal
PURITY	98.0% (Dry basis)
LOSS ON DRYING	30 - 50%
IRON	10ppm max
HEAVY METAL	10ppm max
TRANSPORTATION
PACKING	120kgs in drum
HAZARD CLASS	4.1 (Packing Group: II)
UN NO.	1325
OTHER INFORMATION
half live at 69 C: 10 hrs (water)
DESCRIPTION OF BLOWING AGENT
Blowing agents, also called Foaming agents, can be classified as Physical and Chemical Blowing Agents. Physical blowing agents are not under chemical changes during processing. Physical blowing agents are in forms of liquid or compressed gas which will transfer state into gases or low boiling liquid during processing causing resins into cellular structure. Chemical Blowing Agents are mainly solid form of hydrazine derivatives include Azodicarbonamide; p,p'-Oxybis(benzenesulfonyl hydrazide); 5-Phenyltetrazole; p-Toluene sulfonyl semicarbazide; Trihydrazine Triazine; They commonly release gases such as nitrogen, carbon dioxide, carbon monoxide or ammonia. But ammonia is not desirable as it effects on degrade of resins. There are nonazo blowing agents releasing carbon dioxide such as sodium borohydride.