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N,N-DIMETHYL-P-TOLUIDINE

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N,N-DIMETHYL-P-TOLUIDINE Basic information

Product Name:
N,N-DIMETHYL-P-TOLUIDINE
Synonyms:
  • N,N,4-TRIMETHYLBENZENAMINE
  • N,N-DIMETHYL-4-METHYLANILINE
  • N,N-DIMETHYL-4-TOLUIDINE
  • N,N-DIMETHYL-PARA-TOLUIDINE
  • N,N-DIMETHYL-P-TOLUIDINE
  • Benzeneamine,N,N,4-trimethyl-
  • dimethyl-4-toluidine
  • Dimethyl-p-toluidine
CAS:
99-97-8
MF:
C9H13N
MW:
135.21
EINECS:
202-805-4
Product Categories:
  • Solvents
  • Organic solvents
  • Amines
  • Building Blocks
  • C9
  • Chemical Synthesis
  • Nitrogen Compounds
  • Organic Building Blocks
Mol File:
99-97-8.mol
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N,N-DIMETHYL-P-TOLUIDINE Chemical Properties

Melting point:
-25°C
Boiling point:
211 °C(lit.)
Density 
0.937 g/mL at 25 °C(lit.)
vapor density 
>1 (vs air)
vapor pressure 
0.1 hPa (20 °C)
refractive index 
n20/D 1.546(lit.)
Flash point:
182 °F
storage temp. 
2-8°C
solubility 
0.65g/l
pka
pK1:7.24(+1) (25°C)
form 
Liquid
color 
Clear yellow
explosive limit
7%
Water Solubility 
Miscible with alcohol, ether and chloroform. Immiscible with water.
BRN 
774409
Stability:
Stable. Combustible. Incompatible with strong oxidizing agents.
InChIKey
GYVGXEWAOAAJEU-UHFFFAOYSA-N
CAS DataBase Reference
99-97-8(CAS DataBase Reference)
IARC
2B (Vol. 115) 2018
EPA Substance Registry System
N,N,4-Trimethylaniline (99-97-8)
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Safety Information

Hazard Codes 
T
Risk Statements 
23/24/25-33-52/53
Safety Statements 
28-36/37-45-61-28A-51-44-36-22-20/21
RIDADR 
1708
WGK Germany 
3
RTECS 
XU5803000
8-10-23
Autoignition Temperature
425 °C
TSCA 
Yes
HS Code 
2921 43 00
HazardClass 
6.1
PackingGroup 
II
Toxicity
LD50 orally in Rabbit: 1650 mg/kg

MSDS

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N,N-DIMETHYL-P-TOLUIDINE Usage And Synthesis

Chemical Properties

light yellow liquid

Uses

N,N-Dimethyl-4-toluidine is an amine accelerator for the polymerization of e.g. dental methacrylic restorative materials

Synthesis Reference(s)

Synthetic Communications, 19, p. 3051, 1989 DOI: 10.1080/00397918908052700
Tetrahedron Letters, 8, p. 1849, 1967

General Description

A clear colorless liquid with an aromatic odor. Density 0.937 g / cm3 (Lancaster) and insoluble in water. Hence floats on water. Toxic by skin absorption and inhalation. Flash point 181°F. May release toxic vapors when burned.

Air & Water Reactions

Tends to darken upon exposure to air. Insoluble in water.

Reactivity Profile

N,N-DIMETHYL-P-TOLUIDINE 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.

Health Hazard

TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Fire Hazard

Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.

Purification Methods

Reflux for 3hours with 2 molar equivalents of Ac2O, then fractionally distil it under reduced pressure. Alternatively, dry it over BaO, distil and store it over KOH. The picrate has m 128o (from EtOH). Methods described for N,N-dimethylaniline are applicable here. [Beilstein 12 H 902, 12 III 2026, 12 IV 1874.]

N,N-DIMETHYL-P-TOLUIDINE Preparation Products And Raw materials

Preparation Products

N,N-DIMETHYL-P-TOLUIDINESupplier

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