3,4-Dimethylaniline Chemical Properties

Melting point:

49-51 °C(lit.)

Boiling point:

226 °C(lit.)

Density 

1.076

vapor pressure 

3.72Pa at 25℃

refractive index 

1.5135 (estimate)

Flash point:

209 °F

storage temp. 

Store below +30°C.

solubility 

methanol: 0.1 g/mL, clear

pka

pK1:5.17(+1) (25°C)

form 

Crystalline Mass or Crystals

color 

Light beige to pink to brown

Water Solubility 

<1 g/L (24 ºC)

Merck 

14,10084

BRN 

507414

LogP

1.8 at 25℃

Dissociation constant

5.15 at 25℃

CAS DataBase Reference

95-64-7(CAS DataBase Reference)

NIST Chemistry Reference

Benzenamine, 3,4-dimethyl-(95-64-7)

EPA Substance Registry System

3,4-Dimethylaniline (95-64-7)

Safety Information

Hazard Codes 

T,N

Risk Statements 

23/24/25-33-51/53

Safety Statements 

28-36/37-45-61-28A

RIDADR 

UN 3452 6.1/PG 2

WGK Germany 

2

RTECS 

ZE9450000

F 

8

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

29214910

Hazardous Substances Data

95-64-7(Hazardous Substances Data)

MSDS

• Language:English Provider:1-Amino-3,4-dimethylbenzene
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

3,4-Dimethylaniline Usage And Synthesis

Chemical Properties

slightly beige to beige or pink crystalline mass

Uses

3,4-Dimethylaniline is used to study electron donor-acceptor interaction with DCNQ. It is also used as a fine chemical &organic intermediate.

Uses

3,4-Dimethylaniline (3,4-DMA) has been used to study the electron donor-acceptor (EDA) interaction between 2,3-dicyano-1,4-naphthoquinone (DCNQ) and 3,4-dimethylaniline, in chloroform and dichloromethane. It can also be used for reactions with MoO(X)2(dtc)2 (X = Cl or Br; dtc = diethyldithiocarbamate) in methanol to form ionic imido complexes of the type [MoNAr(dtc)3]2[Mo6O19] or MoNAr(dtc)3]4[Mo8O26].

Definition

ChEBI: A primary arylamine that is aniline in which the hydrogens at the 3- and 4-positions are replaced by methyl groups. A low-melting, crystalline solid, it is used in the production of vitamin B2, dyes, pesticides and other chemicals.

Synthesis Reference(s)

Journal of the American Chemical Society, 63, p. 2532, 1941 DOI: 10.1021/ja01854a509
Organic Syntheses, Coll. Vol. 3, p. 307, 1955

General Description

Pale brown crystals or off-white solid.

Air & Water Reactions

3,4-Dimethylaniline may be sensitive to prolonged exposure to air. Insoluble in water.

Reactivity Profile

3,4-Dimethylaniline ignites on contact with fuming nitric acid . Neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.

Fire Hazard

3,4-Dimethylaniline is combustible.

Safety Profile

Suspected carcinogen. Poison by ingestion. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx. See also other xylidine entries.

Purification Methods

Crystallise it from ligroin and distil it under vacuum. [Beilstein 12 H 1103, 12 IV 2502.]

3,4-Dimethylaniline(95-64-7)Related Product Information

• Betaine
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• DIMETHYLANILINE
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• N,N-Dimethylacetamide
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