ICSC 1485 - DIMETHYLAMINE (aqueous solution)

DIMETHYLAMINE (aqueous solution)	ICSC: 1485 (April 2024)
Methanamine, N-methyl (aqueous solution) DMA (aqueous solution)

CAS #: 124-40-3

UN #: 1160

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire. Many reactions may cause fire or explosion. See Chemical dangers Vapour/air mixtures are explosive.	NO open flames, NO sparks and NO smoking. NO contact with incompatible substances. See Chemical Dangers. Closed system, ventilation, explosion-proof electrical equipment and lighting. Use non-sparking handtools.	Use water in large amounts, alcohol-resistant foam, dry powder, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.

AVOID ALL CONTACT!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Sore throat. Burning sensation. Laboured breathing. Shortness of breath.	Use closed system, local exhaust or breathing protection.	Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately 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 immediately for medical attention .
Eyes	Redness. Pain. Blurred vision. Severe burns.	Wear face shield or eye protection in combination with breathing protection.	Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer immediately for medical attention.
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	CLASSIFICATION & LABELLING
Evacuate danger area! Remove all ignition sources. Consult an expert! Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Do NOT wash away into sewer. Cover the spilled material with foam. Collect leaking and spilled liquid in covered containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.	According to UN GHS Criteria DANGER Flammable liquid and vapour Harmful if swallowed or if inhaled Causes severe skin burns and eye damage May cause respiratory irritation May cause an allergic skin reaction Harmful to aquatic life Transportation UN Classification UN Hazard Class: 3; UN Subsidiary Risks: 8; UN Pack Group: II
STORAGE
Fireproof. Cool. Ventilation along the floor. Separated from strong acids, oxidants, aluminium, copper, copper alloys, mercury, zinc and food and feedstuffs. Store only in original container. Well closed. Store in an area without drain or sewer access.
PACKAGING
Do not transport with food and feedstuffs.

DIMETHYLAMINE (aqueous solution)

ICSC: 1485

PHYSICAL & CHEMICAL INFORMATION
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. Reacts violently with acids, strong oxidants, mercury and chlorine. This generates fire and explosion hazard. This produces irritating and toxic gases including nitrogen oxides. Attacks aluminium, copper, zinc alloys, galvanized surfaces and plastic.	Formula: (CH₃)₂NH / C₂H₇N Molecular mass: 45.1 Boiling point: 51°C Melting point: -37°C Relative density (water = 1): 0.9 Solubility in water: very soluble Vapour pressure, kPa at 20°C: 26.3 Relative vapour density (air = 1): 1.6 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.14 Flash point: -18°C c.c. Auto-ignition temperature: 400°C Explosive limits, vol% in air: 2.8-14.4 Octanol/water partition coefficient as log Pow: -0.38 Viscosity: 1.7 mPa*s at 20°C See Notes.

PHYSICAL & CHEMICAL INFORMATION

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. Reacts violently with acids, strong oxidants, mercury and chlorine. This generates fire and explosion hazard. This produces irritating and toxic gases including nitrogen oxides. Attacks aluminium, copper, zinc alloys, galvanized surfaces and plastic.

Formula: (CH₃)₂NH / C₂H₇N
Molecular mass: 45.1
Boiling point: 51°C
Melting point: -37°C
Relative density (water = 1): 0.9
Solubility in water: very soluble
Vapour pressure, kPa at 20°C: 26.3
Relative vapour density (air = 1): 1.6
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.14
Flash point: -18°C c.c.
Auto-ignition temperature: 400°C
Explosive limits, vol% in air: 2.8-14.4
Octanol/water partition coefficient as log Pow: -0.38
Viscosity: 1.7 mPa*s at 20°C
See Notes.

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. Effects of short-term exposure The substance is corrosive to the eyes and skin. Corrosive on ingestion. The vapour is severely irritating to the respiratory tract. Exposure to the vapour could cause visual disturbances. Inhalation of high levels may cause lung oedema. See Notes.	Inhalation risk A harmful contamination of the air will be reached very quickly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure Repeated or prolonged contact may cause skin sensitization.

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

Effects of short-term exposure
The substance is corrosive to the eyes and skin. Corrosive on ingestion. The vapour is severely irritating to the respiratory tract. Exposure to the vapour could cause visual disturbances. Inhalation of high levels may cause lung oedema. See Notes.

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

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 ppm as TWA; 15 ppm as STEL; (DSEN); A4 (not classifiable as a human carcinogen). EU-OEL: 3.8 mg/m³, 2 ppm as TWA; 9.4 mg/m³, 5 ppm as STEL

ENVIRONMENT
The substance is harmful to aquatic organisms.

NOTES
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 are therefore essential. 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. A 40-60% solution has a pH of 13. See ICSC 0260 Dimethylamine gas in a cylinder.

NOTES

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 are therefore essential.
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.
A 40-60% solution has a pH of 13.
See ICSC 0260 Dimethylamine gas in a cylinder.

ADDITIONAL INFORMATION

EC Classification

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    See Also:
       Toxicological Abbreviations