MOCA

Chemical Name: 4,4'-methylene-bis-(ortho-chloroaniline) (MOCA)
CAS No.: 101-14-4
SPECIFICATIONS

Appearance	Pale yellow granular pellet
Melting range	98 -- 102
Moisture %	< 0.30

PHYSICAL PROPERTIES

Bulk density (24) / g/cm3	1.44
Liquid density (107) / g/ml	1.26
Amine value / mmol/g	7.4-7.6
Free Aniline %	< 1.00
Color (Gardner)	< 4
Acetone insoluble matter %	<0.04
Water absorption tendency	None
Storage stability	Stable, decomposes above 200

SOLUBILITY
Very soluble in Acetone, DMF, DMSO, MEK and THF.
Soluble in Ethanol, Toluene and Benzene.
Insoluble in water.
APPLICATIONS
Curing agent for polyurethane elastomers and cast polyurethanes.
Curing agent for epoxy or epoxy urethane resin.
FORMULATIONS
MOCA-HR is usually used to cure prepolymers that are produced from TDI reacted with polyether or polyester polyol. The prepolymer normally contains NCO of 4.2 - 4.3 %. Pot life is usually 8 - 10 minutes.
MOCA-HR will show a significant reduction in properties if heated for long periods of time at temperatures in excess of 121.
TOXICITY
LD50 (Rats) 5000mg/kg.
OSHA PEL 0.02ppm (8-hour TWA), ACGIH TLV 0.01ppm.
MOCA has been classified as a carcinogen since 1973, based upon test results with laboratory animals. In 1992, ACGIH, after reviewing existing information, continued the classification of MBOCA as a "Suspect Human Carcinogen".
STORAGE
MOCA-HR should be stored in a dry location.
PACKAGING
Net 50-kg carton drum with polyethylene liner.