DIMETHYLAMINE anhydrous

UN Number: 1032 - CAS Number: 124-40-3

Also known as: DMA, N-Methylmethanamine, Dimethylamine Solutions (40%), Solutions De Dimethylamine (40%)

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List

Description

UN number	1032
CAS number	124-40-3
Formula	C₂H₇N

Physical chemical data

Physical State (20°C)

Gas

Physical State (25°C)

Liquid

Density (kg/m3)

2.064 [Kg/m³] at a temperature of 20°C

Kinematic viscosity (cSt)

1.8994 [cSt] at a temperature of 20°C

Molar mass (g/mol)

45.08

Density of gas (kg/m3)

2.064

Solubility (g/L)

10000000 [g/L] at a temperature of 20°C and salinity of 0‰

Boiling Point (°C)

51.5

Melting Point (°C)

-92

Vapour Pressure (Pa)

28708 [Pa] at a temperature of 20°C

Ignition Temperature (°C)

400

Flash Point (°C)

-18

Lower explosivity limit (LEL) (volume %)

2.8

Upper explosivity limit (UEL) (volume %)

14.4

Behaviour at sea

Log kow

-0.38

Additional data

Colour

colourless

Odour

ammonia, dead fish odour

MARPOL pollution category

Category	Description
Y	Noxious Liquid Substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a hazard to either marine resources or human health or cause harm to amenities or other legitimate uses of the sea and therefore justify a limitation on the quality and quantity of the discharge into the marine environment.

Standard behavior classification

Transportation data

Transport mode	Gas,Packaged
Ship type	2G,2PG
State	liq.compr.gas
Temperature (°C)	ambient
Pressure (Pa)	under pressure
Family name	aliphatic amines
IMO class	2(2.1)

Reactivity data

Water	No
Abilities	Solution.
Acid(s)	Yes
Base(s)	No
Metal(s) and alloys	No
Oxidizing agents	Yes
Reducing agents	No
Combustibles	No
Organic substance	Yes

GESAMP Hazard profile

Bioaccumulation in logPow (A1A)	0 - e <1, or > ca.7, or Mol. Wt. > 1000
Bioaccumulation (A1)	0 - No potential to bioaccumulate
Biodegradation (A2)	R - Readily biodegradable
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l))	2 - Slightly toxic
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg))	1 - Slight
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg))	0 - Negligible
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l))	2 - Moderate
Skin irritation/corrosivity (D1)	1 - Mildly irritating
Eye irritation/corrosivity (D2)	1 - Mildly irritating
Interference with coastal amenities (E2)	ED - Evaporator/Dissolver
Effects on wildlife and bottom habitats (E3)	3 - Is highly acutely toxic; and/or is severely irritant or corrosive to skin or eyes; and/or is carcinogenic, mutagenic or reprotoxic; and/or is a floater or persistent floater with associated health effects

Human toxicity threshold

IDHL

2000

Hazard statements

Physical

H224	Extremely flammable liquid and vapour.

Health

H302	Harmful if swallowed.
H314	Causes severe skin burns and eye damage.
H332	Harmful if inhaled.
H335	May cause respiratory irritation.

Environmental

H412	Harmful to aquatic life with long lasting effects.

Precautionary statements

Prevention

P210	Keep away from heat/sparks/open flames/hot surfaces. No smoking.
P261	Avoid breathing dust/fume/gas/mist/vapours/spray.
P273	Avoid release to the environment.
P280	Wear protective gloves/protective clothing/eye protection/face protection.

Response

P305 + P351 + P338

IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Storage

P410 + P403

Protect from sunlight. Store in a well-ventilated place.

TLV-TWA

ERPG-1 (ppm)

0.6

ERPG-2 (ppm)

100

ERPG-3 (ppm)

350

Ecotoxicity

Incident reports

No incident reports available

Emergency Response Guidebook

Guide number: 118

See the guide or download the emergency response guidebook

At sea emergency guide

Emergency schedule: 2-07

LIQUEFIED GASES, FLAMMABLE.

Emergency procedures

Action

Avoid all skin contact.
Avoid all sources of ignition (e.g. naked lights, unprotected light bulbs, electric handtools).

Spillage on deck

Stop leak if practicable. Let spilt liquid evaporate.

Spillage under deck

Provide adequate ventilation. Stop leak if practicable. Let spilt liquid evaporate.

Fire on deck

Use water spray, foam or dry chemical from as far away as practicable.
Keep adjacent receptacles cool with copious quantities of water. Remove undamaged cooled receptacles to a safe place.

Fire under deck

Batten down; use ship's fixed fire-fighting installation. Otherwise adopt action as for "On deck".

Special equipment to be carried

Protective gloves.
Self-contained breathing apparatus.
Spray nozzles.

Remarks by UN no.

ACETYLENE, DISSOLVED (UN No. 1001)
Care! Heated receptacles should be jettisoned as possible explosion hazard.

Decision trees

Corrosive Flammable Flammable gas

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No decision trees available

No additional data