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DIMETHYLAMINE (aqueous solution) ICSC: 1485
Date of Peer Review: May 2003

Methanamine, N-methyl (aqueous solution)
DMA (aqueous solution)
CAS # 124-40-3 (CH3)2NH / C2H7N
RTECS # IP8750000 Molecular mass: 45.1
UN # 1160
EC # 612-001-01-6
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
Water in large amounts, alcohol-resistant foam, dry powder, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
AVOID ALL CONTACT!

Inhalation Burning sensation. Cough. Headache. Sore throat. Laboured breathing. Shortness of breath.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Redness. Pain. Serious skin burns.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes Redness. Pain. Blurred 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. Shock or collapse.
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Remove all ignition sources. Cover the spilled material with foam. Collect leaking liquid in covered containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. Personal protection: filter respirator for organic gases and vapours.
Do not transport with food and feedstuffs.
EU Classification
Symbol: F+, C
R: 12-20/22-34
S: (1/2-)-3-16-26-29-36/37/39-45
Note: [B]
UN Classification
UN Hazard Class: 3
UN Subsidiary Risks: 8
UN Pack Group: II
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30GFC-II
NFPA Code: H3; F4; R0;
Fireproof. Cool. Separated from strong acids, oxidants, aluminium, copper and its alloys, mercury, zinc, food and feedstuffs. Well closed.
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 2004

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DIMETHYLAMINE (aqueous solution) ICSC: 1485
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
SOLUTION IN WATER, WITH PUNGENT ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air and may travel along the ground; distant ignition possible.

CHEMICAL DANGERS:
The solution in water is a strong base, it reacts violently with acid and is corrosive. Reacts violently with strong oxidants and mercury causing fire and explosion hazard. Attacks aluminium, copper, zinc alloys, galvanized surfaces and plastic.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 ppm as TWA; 15 ppm as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2004).
EU OEL: 2 ppm, 3.8 mg/m, as TWA; 5 ppm, 9.4 mg/m, as STEL; (EU 1998).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes and the skin. The vapour is severely irritating to the respiratory tract. Corrosive on ingestion.

PHYSICAL PROPERTIES
Boiling point: 51C
Melting point: -37C
Relative density (water = 1): 0.9
Vapour pressure, kPa at 20C: 26.3
Relative vapour density (air = 1): 1.6
Relative density of the vapour/air-mixture at 20C (air = 1): 1.14
Flash point: -18C
Auto-ignition temperature: 400C
Explosive limits, vol% in air: 2.8-14.4
Octanol/water partition coefficient as log Pow: -0.2
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms.
NOTES
Toxicity information applies to aqueous solutions containing dimethylamine over 15%, and physical properties will vary according to concentration. Physical properties of this card are for the 40% solution. See ICSC 0260 Dimethylamine gas in a cylinder.
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, EU classification.
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 2004