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NIOSH

DIMETHYLAMINE

ICSC: 0260

Methanamine, N-methyl
DMA
(CH3)2NH / C2H7N
Molecular mass: 45.1
(cylinder)
ICSC # 0260 		CAS # 124-40-3
RTECS # IP8750000
UN # 1032
EC # 612-001-00-9
June 05, 2003 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Extremely flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with water spray, alcohol-resistant foam, dry powder, carbon dioxide.
EXPLOSION Gas/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools.
In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.
EXPOSURE
STRICT HYGIENE!

•INHALATION Burning sensation. Cough. Headache. Laboured breathing. Shortness of breath. 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 ON CONTACT WITH LIQUID: FROSTBITE.
Cold-insulating gloves. Protective clothing.
ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention.
•EYES Redness. Pain. Blurred vision.
Safety goggles, 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
Do not eat, drink, or smoke during work.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Ventilation. Remove all ignition sources. NEVER direct water jet on liquid. Remove gas with fine water spray. Do NOT let this chemical enter the environment. (Extra personal protection: complete protective clothing including self-contained breathing apparatus.)
Fireproof. Cool.

F+ symbol
Xn symbol
R: 12-20-37/38-41
S: 2-16-26-39
UN Hazard Class: 2.1
ICSC: 0260 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.

DIMETHYLAMINE

ICSC: 0260

I

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P

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T

A

N

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D

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A

PHYSICAL STATE; APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS , WITH PUNGENT ODOUR.

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

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic fumes including nitrogen oxides . Reacts violently with strong oxidants and mercury causing fire and explosion hazard. Attacks copper, zinc alloys, aluminium, galvanized surfaces, and plastic. The solution in water is a strong base, it reacts violently with acid and is corrosive, see ICSC 1485 Dimethylamine, aqueous solution.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 ppm as TWA; 15 ppm as STEL; A4; (ACGIH 2003).
EU OEL: 2 ppm, 3.8 mg/m3 as TWA; 5 ppm, 9.4 mg/m3 as STEL; (EU 1998).
OSHA PEL: TWA 10 ppm (18 mg/m3)
NIOSH REL: TWA 10 ppm (18 mg/m3)
NIOSH IDLH: 500 ppm See: 124403


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
On loss of containment, a harmful concentration of this gas in the air will be reached very quickly especially in confined spaces.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is severely irritating to the eyes and the respiratory tract . Inhalation of the substance at high levels may cause lung oedema (see Notes). The effects may be delayed. Medical observation is indicated. Rapid evaporation of the liquid may cause frostbite.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 7.0°C
Melting point: -92.2°C
Relative density (water = 1): 0.7
Solubility in water: 354 g/100ml
Vapour pressure, kPa at 25°C: 203
Relative vapour density (air = 1): 1.6
Flash point: Flammable Gas
Auto-ignition temperature: 400°C
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.

N O T E S

Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. 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. Do NOT spray water on leaking cylinder (to prevent corrosion of cylinder). See ICSC 1485 Dimethylamine, aqueous solution.
Transport Emergency Card: TEC (R)-20S1032

NFPA Code: H3; F4; R0;

ADDITIONAL INFORMATION



ICSC: 0260 DIMETHYLAMINE
(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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