Chloroethanoic acid
Monochloroacetic acid
MCA
C2H3ClO2 / ClCH2COOH
Molecular mass: 94.5
ICSC # 0235
CAS # 79-11-8
RTECS # AF8575000
UN # 1751
EC # 607-003-00-1
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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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Combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
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Powder, alcohol-resistant foam, water spray, carbon dioxide.
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Explosion
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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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AVOID ALL CONTACT!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Burning sensation.
Cough.
Sore throat.
Laboured breathing.
Vomiting.
Convulsions.
Unconsciousness.
Symptoms may be delayed (see Notes).
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Half-upright position.
Artificial respiration may be needed.
Refer for medical attention.
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•Skin
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MAY BE ABSORBED!
Redness.
Pain.
Skin burns.
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Protective gloves.
Protective clothing.
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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.
Severe deep burns.
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Face shield
or
eye protection in combination with breathing protection if powder.
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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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Abdominal pain.
Burning sensation.
Shock or collapse.
Convulsions.
Unconsciousness.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Do NOT induce vomiting.
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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Personal protection:
chemical protection suit including self-contained breathing apparatus.
Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Carefully collect remainder,
then remove to safe place.
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Separated from
strong bases,
food and feedstuffs
.
Dry.
Well closed.
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Do not transport with food and feedstuffs.
T symbol
N symbol
R: 25-34-50
S: 1/2-23-37-45-61
UN Hazard Class: 6.1
UN Subsidiary Risks: 8
UN Packing Group: II
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Important Data
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Physical State; Appearance:
COLOURLESS
,
HYGROSCOPIC
CRYSTALS
, WITH PUNGENT ODOUR.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on burning
producing
toxic fumes
including
hydrogen chloride
,
phosgene
.
The solution in water is a medium strong acid.
Attacks metal.
Occupational Exposure Limits:
TLV not established.
MAK: IIb (not established but data is available) (DFG 2004).
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation and through the skin
and
by ingestion.
Inhalation Risk:
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
is corrosive to
the eyes
,
the skin
and
the respiratory tract.
Inhalation of aerosol may cause lung oedema (see Notes).
The substance may cause effects on the
cardiovascular system
and
central nervous system
, resulting in
cardiac disorders
,
convulsions
and
kidney impairment
.
Exposure at high levels 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: 189°C
Melting point: see Notes
Density: 1.58
Solubility in water: very good
Vapour pressure, Pa at 25°C: 8.68
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Relative vapour density (air = 1): 3.26
Flash point: 126°C c.c.
Auto-ignition temperature: 470°C
Explosive limits, vol% in air: 8 -?
Octanol/water partition coefficient as log Pow: 0.34
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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Melting point of alpha form = 63°C, beta form = 56.2°C, gamma form = 52.5°C.
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential.
Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
Other UN numbers: 1750 Chloroacetic acid, solution; 3250 Chloroacetic acid, molten.
Card has been partly updated in October 2005. See section Occupational Exposure Limits.
Transport Emergency Card: TEC (R)-61S1751
NFPA Code: H 3; F 1; R 0;
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ADDITIONAL INFORMATION
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ICSC: 0235
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CHLOROACETIC ACID
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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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