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NIOSH

METHYLAMINE

ICSC: 0178

Methanamine
Aminomethane
Monomethylamine
CH5N / CH3NH2
Molecular mass: 31.1
(cylinder)
ICSC # 0178 		CAS # 74-89-5
RTECS # PF6300000
UN # 1061 (anhydrous)
EC # 612-001-00-9
September 10, 2002 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 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. 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. Severe deep burns.
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. Personal protection: complete protective clothing including self-contained breathing apparatus. NEVER direct water jet on liquid. Remove vapour with fine water spray.
Fireproof. Cool.

F+ symbol
Xn symbol
R: 12-20-37/38-41
S: 2-16-26-39
UN Hazard Class: 2.1
ICSC: 0178 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.

METHYLAMINE

ICSC: 0178

I

M

P

O

R

T

A

N

T


D

A

T

A

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

PHYSICAL DANGERS:
The gas mixes well with air, explosive mixtures are easily formed.

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic fumes including nitrogen oxides . The solution in water is a strong base, it reacts violently with acid and is corrosive. Reacts violently with strong oxidants . Attacks plastic, rubber and coatings. Attacks copper, zinc alloys, aluminium and galvanized surfaces.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 ppm
(as TWA);
15 ppm
(STEL);
(ACGIH 2002).
MAK: 10 ppm, 13 mg/m3;
Peak limitation category: I(1) Pregnancy risk group: D
(DFG 2006).
OSHA PEL: TWA 10 ppm (12 mg/m3)
NIOSH REL: TWA 10 ppm (12 mg/m3)
NIOSH IDLH: 100 ppm See: 74895


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.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive 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: -6°C
Melting point: -93°C
Relative density (water = 1): 0.7 (liquid)
Solubility in water: at 25 °Cvery good
Vapour pressure, kPa at 20°C: 304
Relative vapour density (air = 1): 1.07
Flash point: Flammable Gas
Auto-ignition temperature: 430°C
Explosive limits, vol% in air: 4.9-20.7
Octanol/water partition coefficient as log Pow: -0.71

ENVIRONMENTAL
DATA


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.
Transport Emergency Card: TEC 20S1061

NFPA Code: H3; F4; R0.
Card has been partially updated in July 2007: see Occupational Exposure Limits.

ADDITIONAL INFORMATION



ICSC: 0178 METHYLAMINE
(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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