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CHLOROACETALDEHYDE (40% SOLUTION) ICSC: 0706
Date of Peer Review: October 1997

2-Chloroacetaldehyde
2-Chloro-1-ethanal
Monochloroacetaldehyde
CAS # 107-20-0 C2H3ClO / ClCH2CHO
RTECS # AB2450000 Molecular mass: 78.5
UN # 2232
EC Index # 605-025-00-6
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. NO contact with oxidants and acid(s).
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION Above 88C explosive vapour/air mixtures may be formed.
Above 88C use a closed system, ventilation, and explosion-proof electrical equipment.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
AVOID ALL CONTACT!

Inhalation Burning sensation. Cough. Laboured breathing. Sore throat. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Redness. Serious skin burns. Pain. Blisters.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Redness. Pain. Permanent loss of vision. Severe deep burns.
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal pain. Burning sensation.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Do NOT induce vomiting. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Wash away remainder with plenty of water. Personal protection: complete protective clothing including self-contained breathing apparatus.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
EU Classification
Symbol: T+, N
R: 24/25-26-34-40-50
S: (1/2-)-26-28-36/37/39-45-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: II
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT1-I
Separated from strong oxidants, acids, metals, food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
CHLOROACETALDEHYDE (40% SOLUTION) ICSC: 0706
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
CLEAR COLOURLESS LIQUID, WITH PUNGENT ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air.

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic fumes of chlorine. Reacts with oxidants and acids causing explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 1 ppm (Ceiling value); (ACGIH 2005).
MAK: skin absorption (H); Carcinogen category: 3B; (DFG 2005).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour, and by ingestion.

INHALATION RISK:
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
Corrosive. The vapour is corrosive to the eyes, the skin and the respiratory tract. Inhalation of high concentrations of the vapour may cause lung oedema (see Notes). The effects may be delayed. Medical observation is indicated. See Notes.

PHYSICAL PROPERTIES
Boiling point: (40% solution) 85-100C
Melting point: (40% solution) 16C
Relative density (water = 1): (40% solution) 1.19
Solubility in water: miscible
Vapour pressure, kPa at 20C: 13.3
Relative vapour density (air = 1): 2.7
Relative density of the vapour/air-mixture at 20C (air = 1): 1.22
Flash point: 88C c.c.
Octanol/water partition coefficient as log Pow: 0.37
ENVIRONMENTAL DATA
This substance may be hazardous to the environment; special attention should be given to water quality. This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal.
NOTES
This card refers to the 40% solution. The occupational exposure limit value should not be exceeded during any part of the working exposure. 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 is therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 2005