International Chemical Safety Cards

CYANAMIDE ICSC: 0424
CYANAMIDE
Carbamonitrile
Hydrogen cyanamide
Carbodiimide
CH2N2/H2NCN
Molecular mass: 42.0
CAS # 420-04-2
RTECS # GS5950000
ICSC # 0424
UN # 3276
EC # 615-013-00-2
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Powder, carbon dioxide.
EXPLOSION

Combat fire from a sheltered position.
 
EXPOSURE
PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
INHALATION Cough. Shortness of breath.
Local exhaust or breathing protection.
Fresh air, rest. Refer for medical attention.
SKIN MAY BE ABSORBED! Redness.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
EYES Redness. Pain.
Face shield.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION Abdominal pain.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Vacuum spilled material. Carefully collect remainder, then remove to safe place (extra personal protection: complete protective clothing including self-contained breathing apparatus).
Separated from food and feedstuffs, and incompatible substances (see Chemical Dangers). Cool. Dry. Well closed. Keep in a well-ventilated room.
Airtight. Do not transport with food and feedstuffs.
T symbol
R: 21-25-36/38-43
S: (1/2-)3-22-36/37-45
UN Hazard Class: 6.1
UN Packing Group: III
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0424 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

CYANAMIDE ICSC: 0424

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PHYSICAL STATE; APPEARANCE:
UNSTABLE COLOURLESS DELIQUESCENT CRYSTALS.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance may polymerize at temperatures above 122°C. The substance decomposes on warming above 49°C, on contact with acids, bases and moisture producing toxic fumes including nitrogen oxides and cyanides. Reacts with acids, strong oxidants, strong reducing agents and water causing explosion and toxic hazard. Attacks various metals.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV: ppm; 2 mg/m3 (ACGIH 1993-1994).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the liver.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization.
PHYSICAL
PROPERTIES
 Boiling point at 0.067 kPa: 83°C
Melting point: 45-46°C
Relative density (water = 1): 1.3
 Solubility in water, g/100 ml at 15°C: 77.5
Relative vapour density (air = 1): 1.45
Flash point: 141
ENVIRONMENTAL
DATA
N O T E S
Optimum pH for storage of solutions is around 4; solutions can be stored in glass provided they are stabilized with phosphoric, acetic, sulfuric or boric acid. Other boiling points: 140°C at 2.5 kPa. Use of alcoholic beverages enhances the harmful effect. Do NOT take working clothes home. Term cyanamide is also used to designate calcium cyanamide.
Transport Emergency Card: TEC (R)-61G13A
NFPA Code: H 4; F 1; R 3;
ADDITIONAL INFORMATION


ICSC: 0424 CYANAMIDE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.