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Merck
CN

31659

o-Tolidine

analytical standard

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
UNSPSC Code:
41116107
NACRES:
NA.24
PubChem Substance ID:
329753869
EC Number:
204-358-0
Beilstein/REAXYS Number:
2210640
MDL number:
MFCD00014773

Key Documents

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Product Name

o-Tolidine, analytical standard

InChI key

NUIURNJTPRWVAP-UHFFFAOYSA-N

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

SMILES string

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

grade

analytical standard

shelf life

limited shelf life, expiry date on the label

technique(s)

HPLC: suitable
gas chromatography (GC): suitable

mp

128-131 °C (lit.)

application(s)

cleaning products
cosmetics
food and beverages
personal care

format

neat

Quality Level

100

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Application

o-Tolidine (3,3′-dimethylbenzidine) may be used as an analytical reference standard for the determination of the analyte formed from azo colorants in toy products by high-performance liquid chromatography with UV detection.
Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.
Sensitive colorimetric reagent for gold and for free chlorine in water.

Disclaimer

May be carcinogenic.

General description

o-Tolidine is widely used in the aniline dye industry for the synthesis of different azo dyes.

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Danger

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

dust mask type N95 (US), Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges

Regulatory Information

危险化学品
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Certificates of Analysis (COA)

Lot/Batch Number
BCCL0480
BCCB2039
BCBZ7832

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Carcinogenic properties of orthotolidine (3, 3?-dimethylbenzidine).
Pliss GB and Zabezhinsky MA
Journal of the National Cancer Institute, 45(2), 283- 295 (1970)
Determination of aromatic amines formed from azo colorants in toy products.
Garrigos MC
Journal of Chromatography A, 976(1-2), 309-317 (2002)
Shinpei Kawarai et al.
The Journal of veterinary medical science, 72(2), 131-140 (2009-11-27)
It is essential to develop a technique to culture purified skin-derived mast cells (SMCs) to facilitate immunological research on allergic diseases in dogs. This study was performed to develop an efficient culture system for canine SMCs and to characterize the
Y Chao et al.
Wei sheng wu xue bao = Acta microbiologica Sinica, 40(6), 628-632 (2003-01-29)
A constitutive-laccase-producing fungus was gained from 20 strains of different sources with plate method. Laccase activity reached 0.58 IU/mL when the strain grew on DC medium with shaking cultivation, which was superior to stationary method by 4 times. The enzyme
T Platzek et al.
Human & experimental toxicology, 18(9), 552-559 (1999-10-19)
Azo dyes represent the major class of dyestuffs. They are metabolised to the corresponding amines by liver enzymes and the intestinal microflora following incorporation by both experimental animals and humans. For safety evaluation of the dermal exposure of consumers to
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