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T8533

o-Tolidine

≥95% purity, powder or chunks

Synonym(s):

3,3′-Dimethylbenzidine, 4,4′-Bianisidine

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About This Item

Linear Formula:
[-C6H3(CH3)-4-NH2]2
CAS Number:
119-93-7
Molecular Weight:
212.29
NACRES:
NA.47
PubChem Substance ID:
24900539
UNSPSC Code:
12171500
EC Number:
204-358-0
MDL number:
MFCD00014773
Beilstein/REAXYS Number:
2210640
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Product Name

o-Tolidine, ≥95%

Quality Segment

assay

≥95%

form

powder or chunks

technique(s)

titration: suitable

color

white to light brown

mp

128-131 °C (lit.)

solubility

water: slightly soluble 1.3 g/L at 25 °C

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

Cc1cc(ccc1N)-c2ccc(N)c(C)c2

InChI

1S/C14H16N2/c1-9-7-11(3-5-13(9)15)12-4-6-14(16)10(2)8-12/h3-8H,15-16H2,1-2H3

InChI key

NUIURNJTPRWVAP-UHFFFAOYSA-N

General description

o-Tolidine is a diacidic dye which is sparingly soluble in water and easily soluble in ether and alcohol. On exposure to chlorine or bromine vapors, it forms an intense blue color. This forms the basis for detection of chlorine, nitrates and hydrogen peroxide in air or water. It turns yellow on reacting with free chlorine. o-Tolidine easily forms acid salts.

Application

o-Tolidine has also been used to determine the presence of laccase activity in T. versicolor fungal colonies.
Sensitive colorimetric reagent for gold and for free chlorine in water.

Disclaimer

May be carcinogenic.

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Signal Word

Danger

Hazard Codes

H302,H350,H411

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 2 - Carc. 1B

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point (°F)

212.0 °F - closed cup

Flash Point (°C)

100 °C - closed cup

PPE (personal protective equipment)

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

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