Methyl cyanide
Cyanomethane
Ethanenitrile
Methanecarbonitrile
C2H3N / CH3CN
Molecular mass: 41.0
ICSC # 0088
CAS # 75-05-8
RTECS # AL7700000
UN # 1648
EC # 608-001-00-3
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Highly flammable.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames, NO sparks, and NO smoking.
NO contact with oxidants.
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Alcohol-resistant foam,
dry powder,
carbon dioxide.
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Explosion
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Vapour/air mixtures are explosive.
Risk of fire and explosion on contact with oxidants.
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Closed system, ventilation, explosion-proof electrical equipment and lighting.
Do NOT use compressed air for filling, discharging, or handling.
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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STRICT HYGIENE!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Sore throat.
Weakness.
Abdominal pain.
Laboured breathing.
Convulsions.
Unconsciousness.
Vomiting.
Symptoms may be delayed (see Notes).
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Artificial respiration may be needed.
Refer for medical attention.
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•Skin
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Redness.
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Protective gloves.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
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Face shield
or
eye protection in combination with breathing protection.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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(See Inhalation).
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Induce vomiting (ONLY IN CONSCIOUS PERSONS!).
Give plenty of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Ventilation.
Remove all ignition sources.
Collect leaking liquid in sealable containers.
Absorb remaining liquid in dry sand or inert absorbent and remove to safe place.
Do NOT wash away into sewer.
Personal protection: complete protective clothing including self-contained breathing apparatus.
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Fireproof.
Separated from
acids,
bases
and
oxidants
.
Cool.
Well closed.
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F symbol
Xn symbol
R: 11-20/21/22-36
S: 1/2-16-36/37
UN Hazard Class: 3
UN Packing Group: II
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
The vapour mixes well with air, explosive mixtures are easily formed.
Chemical Dangers:
The substance decomposes
on burning
producing
toxic fumes
including
hydrogen cyanide
and
nitrogen oxides
.
Reacts
with
aqueous
acids
and
bases
producing
toxic fumes
.
Reacts
with
strong oxidants
causing fire and explosion hazard.
Attacks some forms of plastic, rubber and coatings.
Occupational Exposure Limits:
TLV: 20 ppm as TWA; (skin); A4 (not classifiable as a human carcinogen); (ACGIH 2004).
MAK: skin absorption (H);
Pregnancy risk group: C;
(DFG 2004).
EU OEL: 70 mg/m3 40 ppm as TWA (skin) (EU 2006).
OSHA PEL: TWA 40 ppm (70 mg/m3)
NIOSH REL: TWA 20 ppm (34 mg/m3)
NIOSH IDLH: 500 ppm See: 75058
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its vapour,
through the skin
and
by ingestion.
Inhalation Risk:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
,
the skin
and
the respiratory tract
.
The substance may cause effects on the cellular respiration (inhibition)
, resulting in
convulsions
and
respiratory failure
.
Exposure far above the OEL may result in death.
The effects may be delayed.
Medical observation is indicated.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 82°C
Melting point: -46°C
Relative density (water = 1): 0.8
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 9.7
Relative vapour density (air = 1): 1.4
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Relative density of the vapour/air-mixture at 20°C (air = 1): 1.04
Flash point: 12.8°C c.c.
Auto-ignition temperature: 524°C
Explosive limits, vol% in air: 3.0-16
Octanol/water partition coefficient as log Pow: -0.3
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Environmental
Data
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N O T E S
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The symptoms of acute intoxication do not become manifest until after a few hours.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
Card has been partly updated in October 2006: see section Occupational Exposure Limits.
Transport Emergency Card: TEC (R)-30S1648
NFPA Code: H 2; F 3; R 0;
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ADDITIONAL INFORMATION
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ICSC: 0088
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ACETONITRILE
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(C) IPCS, CEC, 1994
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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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