Home Categories Chemical Reagents ο-Tolidine
A7632112

ο-Tolidine , AR,98% , 119-93-7

Synonym(s):
3,3′-Dimethylbenzidine;4,4′-Bianisidine;Ellms-Hauser solution

CAS NO.:119-93-7

Empirical Formula: C14H16N2

Molecular Weight: 212.29

MDL number: MFCD00014773

EINECS: 204-358-0

Update time: 2022-07-08

PRODUCT Properties

Melting point: 128-131 °C(lit.)
Boiling point: 300.5 °C
Density  0.9678 (rough estimate)
refractive index  n20/D 1.341
Flash point: 244 °C
storage temp.  -20°C
solubility  2% HCl: 10 mg/mL, clear
form  powder (may contain lumps)
pka 4.59±0.10(Predicted)
Colour Index  37230
color  light brown
Water Solubility  Slightly soluble in water.
Merck  14,9514
BRN  2210640
Exposure limits TLV-TWA none; carcinogenicity: A2 — Suspected Human Carcinogen (ACGIH), Animal Limited Evidence (IARC).
InChIKey NUIURNJTPRWVAP-UHFFFAOYSA-N

Description and Uses

o-Tolidine, also called orthotolidine or 2-tolidine, is a chemical compound with the molecular formula (C6H4(CH3)NH2)2. It is a white to reddish-colored, combustible, aromatic amine that emits toxic fumes of nitrogen oxides when heated to decomposition. Several isomers are known; the 3-tolidine derivative is also important commercially. It is a colorless compound although commercial samples are often colored. It is slightly soluble in water. It forms salts with acids, such as hydrochloride, which is commercially available. 2-Tolidine can be produced by a benzidine rearrangement from a hydrazine derivative derived from 2-nitrotoluene.

o-Tolidine is used extensively in the manufacture of dyes, especially in the production of soluble azo dyes and insoluble pigments for the textile, leather, and paper sectors. Additionally, It is also used as a sensitive colorimetric reagent for the analysis of gold and free chlorine in water.

Safety

Symbol(GHS) 
GHS07,GHS08,GHS09
Signal word  Danger
Hazard statements  H302-H350-H411
Precautionary statements  P202-P264-P270-P273-P301+P312-P308+P313
Hazard Codes  T,N,F
Risk Statements  45-68-51/53-22-11
Safety Statements  53-45-61-16
RIDADR  UN 3082 9/PG 3
OEL Ceiling: 0.02 mg/m3 [60-minute] [skin]
WGK Germany  3
RTECS  DD1225000
8
TSCA  Yes
HazardClass  6.1(b)
PackingGroup  III
HS Code  29215900
Toxicity dog,LDLo,oral,600mg/kg (600mg/kg),Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 58, Pg. 167, 1907.

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