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Basic Information
CAS No.: 91-93-0
Name: 3,3'-DIMETHOXY-4,4'-BIPHENYLENE DIISOCYANATE
Molecular Structure:
Molecular Structure of 91-93-0 (3,3'-DIMETHOXY-4,4'-BIPHENYLENE DIISOCYANATE)
Formula: C16H12 N2 O4
Molecular Weight: 296.30
Synonyms: Biphenyl,4,4'-diisocyanato-3,3'-dimethoxy- (5CI); Isocyanic acid,3,3'-dimethoxy-4,4'-biphenylylene ester (7CI,8CI);3,3'-Dimethoxy-4,4'-biphenylene diisocyanate; 3,3'-Dimethoxy-4,4'-biphenylylenediisocyanate; 3,3'-Dimethoxy-4,4'-biphenylylene isocyanate;3,3'-Dimethoxydiphenyl-4,4'-diisocyanate;4,4'-Diisocyanato-3,3'-dimethoxy-1,1'-biphenyl; 4,4'-Diisocyanato-3,3'-dimethoxybiphenyl;4,4'-Diisocyanato-3,3'-methoxybiphenyl; NSC 5040
Density: 1.2288 (rough estimate)
Melting Point: 112-116 °C(lit.)
Boiling Point: 437.88°C (rough estimate)
Flash Point: 170 °F
Hazard Symbols: Toxic by inhalation and ingestion, skin irritant.
Risk Codes: 23/24/25
Safety: Poison by intravenous route. A strong sensitizer. Questionable carcinogen with experimental carcinogenic data. When heated to decomposition it emits toxic fumes of NOx. See also CYANATES.
PSA: 77.32000
LogP: 3.30540
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Chemistry

Product Name: Dianisidine diisocyanate (CAS NO.91-93-0)


Molecular Formula: C16H12N2O4
Molecular Weight: 296.28g/mol
Mol File: 91-93-0.mol
Melting Point: 112-116 °C(lit.)
Boiling point: 442.5 °C at 760 mmHg
Storage Temperature:
Flash Point: 196.2 °C
Density: 1.19 g/cm3
Stability: Stable, but air and water sensitive. Incompatible with strong oxidizing agents, strong acids
Surface Tension: 43.1 dyne/cm
Enthalpy of Vaporization: 70 kJ/mol
Vapour Pressure: 4.98E-08 mmHg at 25°C
XLogP3-AA: 5.1
H-Bond Donor: 0
H-Bond Acceptor: 6
Product Categories: Isocyanates; Nitrogen Compounds; Organic Building Blocks

Toxicity Data With Reference

1.    

mmo-sat 3300 ng/plate

     ENMUDM    Environmental Mutagenesis. 7 (Suppl 5)(1985),1.
2.    

mma-sat 3 µg/plate

     ENMUDM    Environmental Mutagenesis. 7 (Suppl 5)(1985),1.
3.    

orl-rat TDLo:565 g/kg/78W-I:CAR

     NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-128 ,1979.
4.    

orl-rat TD:1200 g/kg/78W-I:CAR

     NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-128 ,1979.
5.    

ivn-mus LD50:180 mg/kg

     CSLNX*    U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) NX#02411 .

Consensus Reports

IARC Cancer Review: Group 3 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 (1987),p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 39 (1986),p. 279.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . NCI Carcinogenesis Bioassay (feed); No Evidence: mouse NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-128 ,1979. ; Clear Evidence: rat NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-128 ,1979. .

Safety Profile

Poison by intravenous route. A strong sensitizer. Questionable carcinogen with experimental carcinogenic data. When heated to decomposition it emits toxic fumes of NOx. See also CYANATES.
Safety Information of Dianisidine diisocyanate (CAS NO.91-93-0):
Hazard Codes: T
Risk Statements: 23/24/25 
23:  Toxic by inhalation 
24:  Toxic in contact with skin 
25:  Toxic if swallowed 
Safety Statements: 26-36-45
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36:  Wear suitable protective clothing
45:  In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)

Standards and Recommendations

NIOSH REL: (Diisocyanates) TWA 0.005 ppm; CL 0.02 ppm/10M

Specification

 Dianisidine diisocyanate ,its CAS NO. is 91-93-0,the synonyms is 3,3'-Dimethoxy-4,4'-biphenyleneisocyanicacidester ; 3,3'-Dimethoxy-4,4'-biphenylylenediisocyanate ; 3,3'-Dimethoxy-4,4'-biphenylyleneisocyanate ; 3,3'-Dimethoxy-4,4'-biphenylyleneisocyanicacidester ; 3,3'-Dimethoxy-4,4'-diphenylyleneisocyanate ; 3,3'-Dimethoxy-4,4'-diphenylylisocyanate ; 4,4'-Diisocyanato-3,3'-dimethoxy-1,1'-biphenyl ; 4,4'-Diisocyanato-3,3'-dimethoxy-1'-biphenyl .