3,4-Diaminotoluene Chemical Properties

Melting point:

87-89 °C (lit.)

Boiling point:

155-156 °C/18 mmHg (lit.)

Density 

1.2207 (rough estimate)

refractive index 

1.5103 (estimate)

Flash point:

155-156°C/18mm

storage temp. 

Keep in dark place,Inert atmosphere,Room temperature

solubility 

Chloroform (Sparingly), Methanol (Slightly)

pka

4.59±0.10(Predicted)

form 

Crystalline Chunks or Flakes

color 

Brown to grayish-brown

Water Solubility 

16 g/L (20 ºC)

BRN 

507965

Stability:

Stable. Incompatible with strong oxidizing agents.

CAS DataBase Reference

496-72-0(CAS DataBase Reference)

NIST Chemistry Reference

1,2-Benzenediamine, 4-methyl-(496-72-0)

EPA Substance Registry System

3,4-Diaminotoluene (496-72-0)

Safety Information

Hazard Codes 

Xn

Risk Statements 

20/21/22-36/37/38-52/53-40-36-22

Safety Statements 

26-37/39-61-36/37/39

RIDADR 

UN 2811

WGK Germany 

2

RTECS 

XS9820000

TSCA 

Yes

HazardClass 

6.1(b)

PackingGroup 

III

HS Code 

29215119

Hazardous Substances Data

496-72-0(Hazardous Substances Data)

MSDS

• Language:English Provider:4-Methyl-o-phenylenediamine
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

3,4-Diaminotoluene Usage And Synthesis

Chemical Properties

Off-white small blocks

Uses

5-Methylbenzotriazole intermediate.

Uses

4-Methyl-o-phenylenediamine was employed as chromogenic reagent in the spectrophotometric determination of selenium(IV). It was used in the synthesis of an asymmetrical tetradentate Schiff base via condensation with dehydroacetic acid and salicylic aldehyde.

Synthesis Reference(s)

Tetrahedron Letters, 42, p. 2277, 2001 DOI: 10.1016/S0040-4039(01)00163-0

General Description

A colorless to brownish purple crystalline solid. Toxic by ingestion and inhalation and an irritant to skin and eyes. Soluble in water, alcohol and ether. Decomposes to emit toxic oxides of nitrogen when heated to high temperature. Used in making dyes.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

3,4-Diaminotoluene 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

Flash point data for 3,4-Diaminotoluene are not available. 3,4-Diaminotoluene is probably combustible.

3,4-Diaminotoluene(496-72-0)Related Product Information

• Kresoxim-methyl
• Methyl acrylate
• Bensulfuron methyl
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• Benzylamine
• p-Toluidine
• m-Xylene
• o-Phenylenediamine
• 2,5-DIAMINOTOLUENE
• Methylparaben
• o-Xylene
• METHYL THIOPHENE-2-CARBOXYLATE
• Iminodiacetonitrile
• Thiophanate-methyl
• Methyl
• 2,3-DIAMINOTOLUENE OEKANAL, 250 MG,ORTHO-DIAMINOTOLUENE,2,3-Diaminotoluene 98%,2,3-DIAMINOTOLUENE
• Parathion-methyl
• Methyl bromide