NIOSH Pocket Guide to Chemical Hazards


CAS 420-04-2


RTECS GS5950000
Synonyms & Trade Names
Amidocyanogen, Carbimide, Carbodiimide, Cyanogen nitride, Hydrogen cyanamide [Note: Cyanamide is also a synonym for Calcium cyanamide.]
DOT ID & Guide


NIOSH REL: TWA 2 mg/m3
OSHA PEL†: none
IDLH N.D. See: IDLH INDEX Conversion
Physical Description
Crystalline solid.
MW: 42.1
BP: 500°F (Decomposes)
MLT: 113°F
Sol(59°F): 78%
VP: ?
IP: 10.65 eV

Sp.Gr: 1.28
Fl.P: 286°F
UEL: ?
LEL: ?

Combustible Solid
Incompatibilities & Reactivities
Above 104°F: Moisture, acids, or alkalis; 1,2-phenylene diamine salts [Note: Polymerization may occur on evaporation of aqueous solutions.]
Measurement Methods
NIOSH 0500
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations Not available.
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; eye, skin burns; miosis, salivation, lacrimation (discharge of tears), twitching; Antabuse-like effects
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0424