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Name	4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE	EINECS	N/A
CAS No.	139-25-3	Density	1.1 g/cm³
PSA	58.86000	LogP	3.82880
Solubility	N/A	Melting Point	N/A
Formula	C17H14 N2 O2	Boiling Point	410.4 °C at 760 mmHg
Molecular Weight	278.31	Flash Point	169.5 °C
Transport Information	N/A	Appearance	N/A
Safety	Poison by intravenous route. A sensitizer. When heated to decomposition it emits toxic fumes of NO_x and CN⁻.	Risk Codes	N/A
Molecular Structure		Hazard Symbols	N/A
Synonyms	Isocyanicacid, methylenebis(2-methyl-p-phenylene) ester (7CI,8CI);3,3'-Dimethyldiphenylmethane 4,4'-diisocyanate;4,4'-Diisocyanato-3,3'-dimethyldiphenylmethane;4,4'-Diphenyl-3,3'-dimethylmethane diisocyanate; NSC 84203; Nacconate 310

4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE Chemical Properties

IUPAC Name:1-Isocyanato-4-[(4-isocyanato-3-methylphenyl)methyl]-2-methylbenzene
Synonyms: 3,3'-Dimethyldiphenylmethane 4,4'-diisocyanate ; 3,3'-Dimethyldiphenylmethane-4,4'-diisocyanate ; 3,3'-Dimethyldiphenylmethane-4,4'-diisocyanate [Diisocyanates] ; 4, 4'-Diisocyanato-3,3'-dimethyldiphenylmethane ; 4,4'-Diisocyanato-3,3'-dimethyldiphenylmethane ; 5, 5'-Methylenebis (2-isocyanatotoluene) ; 5, 5'-Methylenebis (2-isocyanatotoluene)
Product Categories: Diphenylmethanes (for High-Performance Polymer Research);Functional Materials;Reagent for High-Performance Polymer Research
CAS NO: 139-25-3
Molecular Formula of 4, 4'-Diisocyanato-3,3'-dimethyldiphenylmethane (CAS NO. 139-25-3) : C₁₇H₁₄N₂O₂
Molecular Weight of 4, 4'-Diisocyanato-3,3'-dimethyldiphenylmethane (CAS NO. 139-25-3): 278.31
Molecular Structure of 4, 4'-Diisocyanato-3,3'-dimethyldiphenylmethane (CAS NO. 139-25-3) :
Mol File: 139-25-3.mol
Index of Refraction: 1.576
Surface Tension: 41.1 dyne/cm
Density: 1.1 g/cm³
Flash Point: 169.5 °C
Enthalpy of Vaporization: 66.27 kJ/mol
Boiling Point: 410.4 °C at 760 mmHg
Vapour Pressure: 6.04E-07 mmHg at 25°C

4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE Toxicity Data With Reference

ivn-mus LD50:320 mg/kg

CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) NX#00946 .

4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE Consensus Reports

Reported in EPA TSCA Inventory.

4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE Safety Profile

RTECS NQ8820000

4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE Standards and Recommendations

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

4,4'-DIISOCYANATO-3,3'-DIMETHYLDIPHENYLMETHANE Specification

Reactivity Profile: Isocyanates and thioisocyanates, such as 4, 4'-Diisocyanato-3,3'-dimethyldiphenylmethane (CAS NO. 139-25-3) , are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence.

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