2,4-Diaminotoluene Property

Melting point:

97-99 °C(lit.)

Boiling point:

283-285 °C(lit.)

Density 

1.26 g/cm3 (20℃)

vapor pressure 

0.017 hPa (25 °C)

refractive index 

1.5103 (estimate)

Flash point:

149 °C

storage temp. 

room temp

solubility 

38g/l

form 

Powder, Crystals and/or Chunks

pka

5.02±0.10(Predicted)

Colour Index 

76035

color 

Brown to dark gray

Water Solubility 

50 g/l (25 ºC)

BRN 

2205839

Exposure limits

Carcinogenicity: Animal Sufficient Evidence (IARC); no TWA assigned (because it is a carcinogen, there should be no exposure to this compound).

InChIKey

VOZKAJLKRJDJLL-UHFFFAOYSA-N

LogP

0.074 at 20℃

CAS DataBase Reference

95-80-7(CAS DataBase Reference)

NIST Chemistry Reference

1,3-Benzenediamine, 4-methyl-(95-80-7)

IARC

2B (Vol. 16, Sup 7) 1987

EPA Substance Registry System

2,4-Toluenediamine (95-80-7)

Safety

Hazard Codes 

T,N

Risk Statements 

45-21-25-36-43-51/53-68-62-48/22

Safety Statements 

53-45-61

RIDADR 

UN 1709 6.1/PG 3

WGK Germany 

3

RTECS 

XS9625000

F 

8-10-23

Autoignition Temperature

505 °C

TSCA 

Yes

HazardClass 

6.1(b)

PackingGroup 

III

HS Code 

29215119

HS Code 

29331990

Hazardous Substances Data

95-80-7(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 73 mg/kg LD50 dermal Rabbit 650 mg/kg

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H317May cause an allergic skin reaction

H341Suspected of causing genetic defects

H350May cause cancer

H373May cause damage to organs through prolonged or repeated exposure

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P201Obtain special instructions before use.

P202Do not handle until all safety precautions have been read and understood.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

2,4-Diaminotoluene Chemical Properties,Usage,Production

Chemical Properties

2,4-Diaminotoluene is an organic compound with the formula C6H3(NH2)2CH3. It is one isomer of six with this formula. It is a synthetic, colorless to brown crystalline solid that is soluble in water, ethanol, ether and benzene. It is used primarily as an intermediate in the production of toluene diisocyanate, which is used to produce polyurethane.

Uses

2,4-diaminotoluene is used primarily in the production of 2,4-toluene diisocyanate, which is used in the production of polyurethane. It is used as an intermediate in the synthesis of dyes and heterocyclic compounds. 2,4-Diaminotoluene has been used as a developer for direct dyes, particularly to obtain black, dark blue, and brown shades, and to obtain navy blue and black colors on leather. Other applications include the preparation of impact resins, polyamides with superior wire-coating properties, antioxidants, hydraulic fluids, urethane foams, and fungicide stabilizers, and as a photographic developer (HSDB 2009).

Preparation

2,4-Diaminotoluene is prepared by hydrogenation of 2,4-dinitrotoluene using a nickel catalyst. Commercial samples often contain up to 20% of the 2,6-isomer.

Definition

ChEBI: 2,4-diaminotoluene is an aminotoluene that is para-toluidine with an additional amino group at position 2. It has a role as a metabolite. It derives from a p-toluidine.

General Description

A colorless crystalline solid. Toxic by ingestion and inhalation. Irritates skin and eyes. Slightly soluble in water and neutrally buoyant in water. Decomposes with emission of toxic oxides of nitrogen at high temperatures. Used in making dyes.

Air & Water Reactions

Soluble in water, alcohol and ether.

Reactivity Profile

2,4-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. May generate hydrogen, a flammable gas, in combination with strong reducing agents such as hydrides. Reacts vigorously with oxidizing agents [USCG, 1999].

Health Hazard

2,4-Toluenediamine is a cancer-causing compound. Animal studies indicate sufficient evidence of its carcinogenicity. Oral applicationof this amine resulted in blood and liver cancers in rats and mice.
The acute oral toxicity was moderate tohigh in test animals. It produced methe moglobinemia, cyanosis, and anemia. Theoral LD50 value in rats is 250–300 mg/kg.It is a mild skin irritant. The irritation effecton rabbits'eyes was moderate.
Acute (short-term) exposure to high levels of toluene-2,4-diamine in humans has caused severe skin and eye irritation sometimes leading to permanent blindness. Other effects include respiratory problems, stomach gas, rise in blood pressure, dizziness, convulsions, fainting, and coma.

Fire Hazard

Noncombustible solid. It ignites when mixed with red fuming nitric acid. Reactions with strong oxidizers and hypochlorites can be violent.

Flammability and Explosibility

Non flammable

Safety Profile

Confirmed carcinogen with experimental carcinogenic data. Poison by intraperitoneal and subcutaneous routes. Experimental reproductive effects. Human mutation data reported. A skin and eye irritant. This material has a marked toxic action upon the liver and can cause fatty degeneration of that organ. When heated to decomposition it emits toxic fumes of NOx. See also other toluenediamine entries and AROMATIC AMINES.

Potential Exposure

2,4-Diaminotoluene can be found in flexible and rigid polyurethane foams, upholstery, polyurethane coatings, for dyes used on textiles, leather, furs, in hair-dye formulations, sealants, adhesives gums and fibers. The substance is also commonly used when manufacturing other substances.

Carcinogenicity

2,4-Diaminotoluene is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals.

Shipping

UN1709 2,4-Toluylenediamine, solid or 2,4Toluenediamine, solid, Hazard Class: 6.1; Labels: 6.1-Poisonous materials. UN3814 2,4-Toluylenediamine, solution or 2,4-Toluenediamine, solution, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Purification Methods

Recrystallise the diamine from water containing a very small amount of sodium dithionite (to prevent air oxidation), and dry it under vacuum. It also crystallises from *benzene. [Beilstein 13 IV 235.]

Incompatibilities

Strong acids; chloro formates, oxidizers.

Waste Disposal

Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal. Controlled incineration (oxides of nitrogen are removed from the effluent gas by scrubbers and/or thermal devices).