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NIOSH

CYANAMIDE

ICSC: 0424

Carbamonitrile
Hydrogen cyanamide
Carbodiimide
Carbimide
Cyanogenamide
Amidocyanogen
CH2N2 / H2NCN
Molecular mass: 42.0
ICSC # 0424 		CAS # 420-04-2
RTECS # GS5950000
UN # 2811
EC # 615-013-00-2
November 23, 2007 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Combustible only at increased temperature. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Carbon dioxide. Dry powder. Dry sand. water spray,
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. Seek medical attention if you feel unwell
•SKIN MAY BE ABSORBED! Redness. Pain.
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 Burning sensation. Sore throat. Abdominal pain.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Personal protection: complete protective clothing including self-contained breathing apparatus. Vacuum spilled material. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment.
Separated from food and feedstuffs and incompatible materials . See Chemical Dangers. Cool. Store at maximum 20 °C, never exceed 30 °C. Dry. Well closed. Keep in a well-ventilated room. Store only if stabilized. See Notes for optimal pH stabilization. Can be stored in stainless steel, polyethylene and polypropylene.
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
Signal: Danger
Skull-Health haz
Toxic if swallowed
Fatal in contact with skin
Causes skin irritation
Causes serious eye irritation
May cause allergic skin reaction
Suspected of damaging fertility or the unborn child
Harmful to aquatic life
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.

CYANAMIDE

ICSC: 0424

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PHYSICAL STATE; APPEARANCE:
COLOURLESS, HYGROSCOPIC, DELIQUESCENT CRYSTALS.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
Highly reactive compound. Can explode in vacuum distillation. The substance may polymerize spontaneously. Dimerizes at temperatures above 40 °C with strong heat release. Dimerization is catalyzed by traces of bases. The substance decomposes on contact with acids , bases and moisture producing toxic fumes, including ammonia, nitrogen oxides and cyanides. Reacts with acids , strong oxidants , and strong reducing agents causing explosion and toxic hazard. Attacks metal (e.g. steel, copper, aluminium).

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 2 mg/m3 as TWA; (ACGIH 2007).
EU OEL: 0.58 ppm 1 mg/m3 as TWA (skin) (EU 2006).
OSHA PEL†: none
NIOSH REL: TWA 2 mg/m3
NIOSH IDLH: N.D. See: IDLH INDEX


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

INHALATION RISK:
A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is severely irritating to the eyes and the skin and is irritating to the respiratory tract. See Notes.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. Animal tests show that this substance possibly causes toxicity to human reproduction or development.

PHYSICAL
PROPERTIES

Boiling point at 0.067kPa: 83°C
Melting point: 44°C
Decomposes at 260 °C

Relative density (water = 1): 1.28
Solubility in water, g/100 ml at 25°C: 85
Vapour pressure, Pa at 20°C: 0.5
Flash point: 141°C

ENVIRONMENTAL
DATA

The substance is harmful to aquatic organisms. It is strongly advised that this substance does not enter the environment. of fish & daphne LC50s

N O T E S

Cyanamide has to be stabilized by pH-buffer against dimerization and decomposition. An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. Cyanamide that has been stored for a long time or is contaminated, should be diluted with at least three times its volume of water to avoid critical decomposition temperatures being reached. Do NOT take working clothes home. Term cyanamide is also used to designate calcium cyanamide. In combination with even small amounts of alcohol the substance causes effects on cardiovascular and central nervous systems resulting in flushing, palpitation, hypotension and hyperventilation. 007
Transport Emergency Card: TEC (R)-61GT1-III

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.
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