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NIOSH

METHYLAMINE (40% aqueous solution)

ICSC: 1483

Methanamine
Aminomethane
Monomethylamine
CH5N / CH3NH2
Molecular mass: 31.1
ICSC # 1483 		CAS # 74-89-5
RTECS # PF6300000
UN # 1235
EC # 612-001-01-6
May 05, 2003 Validated

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 spray, 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.
Rinse skin with plenty of water or shower. Refer for medical attention. Remove contaminated clothes.
•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 one or two glasses of water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Ventilation. Remove all ignition sources. Collect leaking liquid in covered containers. Cautiously neutralize remainder with a dilute acid. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Carefully collect remainder, then remove to safe place. (Extra personal protection: filter respirator for organic gases and vapours.)
Fireproof. Cool. Well closed. Separated from food and feedstuffs , strong acids, oxidants, aluminium, copper , zinc and its alloys, mercury. Keep in a well-ventilated room.
Do not transport with food and feedstuffs.
Note: B
F+ symbol
C symbol
R: 12-20/22-34
S: 2-3-16-26-29-36/37/39-45
UN Hazard Class: 3
UN Subsidiary Risks: 8
UN Packing Group: II
ICSC: 1483 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 (40% aqueous solution)

ICSC: 1483

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PHYSICAL STATE; APPEARANCE:
COLOURLESS SOLUTION IN WATER , WITH PUNGENT ODOUR.

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

CHEMICAL DANGERS:
Reacts violently with mercury compounds causing fire and explosion hazard. The substance is a medium strong base. Attacks plastic, rubber, copper, aluminium, zinc alloys and galvanized surfaces.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 ppm as TWA; 15 ppm as STEL; (ACGIH 2008).
MAK: 10 ppm, 13 mg/m3;
Peak limitation category: I(1); Pregnancy risk group: D;
(DFG 2008).


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

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

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

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 48°C
Melting point: -39°C
Relative density (water = 1): 0.89
Vapour pressure, kPa at 20°C: 31
Relative vapour density (air = 1): 1.08
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.02
Flash point: -10°C
Auto-ignition temperature: 430°C
Explosive limits, vol% in air: 4.9-20.8
Octanol/water partition coefficient as log Pow: -0.6

ENVIRONMENTAL
DATA


N O T E S

See ICSC 0178 Methylamine gas in a cylinder.
Transport Emergency Card: TEC (R)-30GFC-II

NFPA Code: H3; F4; R0
Card has been partially updated in February 2009: see Occupational Exposure Limits, Ingestion First Aid.

ADDITIONAL INFORMATION



ICSC: 1483 METHYLAMINE (40% aqueous solution)
(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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