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Calcium cyanamide

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Synonyms & Trade Names
Calcium carbimide, Cyanamide [Calcium cyanamide], Lime nitrogen, Nitrogen lime [Note: Cyanamide is also a synonym for Hydrogen cyanamide, NH2CN.]
CAS No.
156-62-7
RTECS No.
GS6000000
DOT ID & Guide
1403 138(with >0.1% calcium carbide)
Formula
CaCN₂
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 0.5 mg/m3
OSHA PEL
none See Appendix G
Measurement Methods
NIOSH 0500
See: NMAM or OSHA Methods
Physical Description
Colorless, gray, or black crystals or powder. [fertilizer] [Note: Commercial grades may contain calcium carbide.]
Molecular Weight
80.1
Boiling Point
Sublimes
Melting Point
2444°F
Solubility
Insoluble
Vapor Pressure
0 mmHg (approx)
Ionization Potential
NA
Specific Gravity
2.29
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Solid, but a fire risk if it contains calcium carbide.
Incompatibilities & Reactivities
Water [Note: May polymerize in water or alkaline solutions to dicyanamide. Decomposes in water to form acetylene & ammonia.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; headache, dizziness, rapid breath, low blood pressure, nausea, vomiting; skin burns, sensitization; cough; Antabuse-like effects
Target Organs
Eyes, skin, respiratory system, vasomotor system
Personal Protection/Sanitation
(See protection codes)
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:Soap flush immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1639
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health