International Chemical Safety Cards

CYANAMIDE

ICSC: 0424

Carbamonitrile
Hydrogen cyanamide
Carbodiimide
CH₂N₂ / H₂NCN
Molecular mass: 42.0

ICSC #    0424
CAS #     420-04-2
RTECS # GS5950000
UN #        3276
EC #         615-013-00-2
April 21, 1994 Peer reviewed

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 materials 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 (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

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 acids , strong oxidants , strong reducing agents and water causing explosion and toxic hazard. Attacks various metals.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 2 mg/m³ (ACGIH 1993-1994).
OSHA PEL: none
NIOSH REL: TWA 2 mg/m³
NIOSH IDLH: No data

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 0.0067kPa: 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°C

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
(C) IPCS, CEC, 1994

IMPORTANT LEGAL NOTICE:

Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, 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. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.