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Dimethylamine

Dimethylamine structure

CAS No:
124-40-3
Formula:
C2H7N
Chemical Name:
Dimethylamine
Synonyms:
Methanamine,N-methyl-;Dimethylamine;N-Methylmethanamine;N,N-Dimethylamine;NSC 8650
Categories:
Organic Chemistry > Amides

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Description

Colorless gas with an ammonia- or fish-like odor. [Note: A liquid below 44°F. Shipped as a liquefied compressed gas.]

Dimethylamine Basic Attributes

Molecular Weight：

45.08

Exact Mass：

45.08

BRN：

605257

EC Number：

204-697-4

HScode：

2921110010

Characteristics

PSA：

XLogP3：

-0.2

Appearance：

Clear slightly yellow Solution

Density：

0.6804 g/cm³ @ Temp: 0 °C

Melting Point：

-92.2 °C

Boiling Point：

6.8 °C

Flash Point：

60 °F

Refractive Index：

n20/D 1.37

Water Solubility：

Miscible with water and most organic solvents.

Storage Conditions：

Flammables area

Vapor Pressure：

16.97 psi ( 55 °C)

Vapor Density：

1.55 (vs air)

Toxicity：

Oral-Rat LD50: 698 mg/kg; Oral-Mouse LD50: 316 mg/kg

Flammability characteristics：

Inflammable in case of open flame, high temperature, oxidant; burning produces toxic nitrogen oxide fumes

Explosive limit：

14.4%

Odor：

... Ammonia or fish-like odor ...

PH：

Aqueous solutions of dimethylamine are highly alkaline, like ammonia

Safety Information

Packing level：

Hazard category：

Transport codes：

UN 2924 3/PG 2

wgk germany：

hazard class code：

12-20-37/38-41-34-20/22-11-39/23/24/25-23/24/25-52/53-40-19

safety instructions：

3-16-26-29-36/37/39-45-39-61

RTECS Number：

IP8750000

Marks：

F+,Xn,C,F,T

Storage features：

The warehouse is ventilated, low temperature and dry; stored separately from oxidants and acids

Explosive characteristics：

Open flame mixed with air, can be explosive when heated

Stability/Shelf Life：

Stable under recommended storage conditions.

Precautionary statement(s)：

P210, P261, P264, P271, P280, P302+P352, P304+P312, P304+P340, P305+P351+P338, P310, P312, P321, P332+P313, P362, P377, P381, P403, P403+P233, P405, P410+P403, P501

Hazard Statements：

H220

Toxicity

Toxicity class：

highly toxic

Dimethylamine Use and Manufacturing

Methods of Manufacturing

Methanol ammoniating method. It is obtained by reacting methanol as raw material with ammonia. The reaction temperature is 425℃, the reaction pressure is 2.45 MPa, the catalyst is α-Al2O3, and the methanol is ammoniated by gas phase catalytic reaction to obtain crude monomethylamine, dimethylamine and trimethylamine, then pressurized After rectification, single-component, relatively pure industrial products monomethylamine, dimethylamine and trimethylamine were obtained. CH3OH+NH3→CH3NH2+H2O2CH3OH+NH3→(CH3)2NH+2H2O3CH3OH+NH3→(CH3)3N+3H2O

Uses

Determination of magnesium and zinc. Precipitation of zinc hydroxide and manganese hydroxide. Acid gas absorbent. Solvent. Check chloropicrin and carbon dioxide in the air. Preparation of organic synthesis intermediates, dimethyl dithiocarbamate, etc.

Computed Properties

Molecular Weight:45.08
XLogP3:-0.2
Hydrogen Bond Donor Count:1
Hydrogen Bond Acceptor Count:1
Exact Mass:45.057849228
Monoisotopic Mass:45.057849228
Topological Polar Surface Area:12
Heavy Atom Count:3
Complexity:2.8
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

2-Naphthol

Urea

Methanol

Ammonia

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