3,3'-DIMETHOXY-4,4'-BIPHENYLENE DIISOCYANATE

CAS NO.：91-93-0
Empirical Formula: C16H12N2O4
Molecular Weight: 296.28
MDL number: MFCD00013847
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-28 03:05:06

What is 3,3'-DIMETHOXY-4,4'-BIPHENYLENE DIISOCYANATE?

Chemical properties

grey to brown powder

Definition

ChEBI: 3,3'-Dimethoxybenzidine-4,4'-diisocyanate is a member of biphenyls.

General Description

Gray to brown powder or dark beige sandy powder. Melting point 112°C. Insoluble in water. Toxic by inhalation and ingestion. A skin irritant. Used in making plastics.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

3,3'-DIMETHOXY-4,4'-BIPHENYLENE DIISOCYANATE may react with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizing agents, hydrides, phenols, and peroxides with vigorous releases of heat. May undergo polymerization reactions with acids and bases.

Fire Hazard

Flash point data for 3,3'-DIMETHOXY-4,4'-BIPHENYLENE DIISOCYANATE are not available; however, 3,3'-DIMETHOXY-4,4'-BIPHENYLENE DIISOCYANATE is probably combustible.

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.

Properties of 3,3'-DIMETHOXY-4,4'-BIPHENYLENE DIISOCYANATE

Melting point:	112-116 °C(lit.)
Boiling point:	437.88°C (rough estimate)
Density	1.2288 (rough estimate)
refractive index	1.5800 (estimate)
Flash point:	170 °F
Stability:	Stable, but air and water sensitive. Incompatible with strong oxidizing agents, strong acids.
IARC	3 (Vol. 39, Sup 7) 1987
EPA Substance Registry System	3,3'-Dimethoxybenzidine-4,4'-diisocyanate (91-93-0)