5,5-Dimethylhydantoin CAS 77-71-4

CAS: 77-71-4

Molecular Formula: C5H8N2O2

Molecular Weight: 128.13

EINECS: 201-051-3

Synonyms: A-UREIDOISOBUTYRIC ACID LACTAM; DMH; DIMETHYLHYDANTOIN; 5,5-DIMETHYL-2,4-DIOXOTETRAHYDROIMIDAZOLE; 5,5-DIMETHYL-2,4-IMIDAZOLIDINEDIONE; 5,5'-DIMETHYLHYDANTOIN; 5,5-DIMETHYLHYDANTOIN; 5,5-Dimethylimidazolidine-2,4-dione; 5,5-Dimethylhydrantoin

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What is 5,5-Dimethylhydantoin CAS 77-71-4?

5,5-Dimethylhydantoin is a white prismatic crystal or crystalline powder. Melting point 175 ℃. Soluble in water, hexanol, ethyl acetate, and dimethyl ether, slightly soluble in isopropanol, acetone, and methyl ethyl ketone, insoluble in fatty hydrocarbons and trichloroethylene. Odorless, capable of sublimation, and acidic.

Specification

Item	Specification
Boiling point	237.54°C (rough estimate)
Density	1.2864 (rough estimate)
Melting point	174-177 °C (lit.)
flash point	193°C
resistivity	1.4730 (estimate)
pKa	pKa 8.1 (Uncertain)

Application

Used as a new type of environmentally friendly flame retardant, mainly used to replace decabromodiphenyl ether flame retardant, can be used in HIPS, ABS resin and PVC, PP and other plastics