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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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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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Related Categories

General description

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

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.

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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)
A K Cook et al.
American journal of veterinary research, 53(10), 1749-1751 (1992-10-01)
To evaluate the effect of diet on results obtained by use of 2 commercial test kits for detection of occult blood in feces, 5 dogs were fed 7 diets in randomized sequence. Dry and canned diets with various principal ingredients
Dyes metabolized to 3,3'-dimethylbenzidine (3,3'-dimethylbenzidine dye class.
Report on carcinogens : carcinogen profiles, 10, 105-106 (2004-08-25)
Dyes metabolized to 3,3'-dimethylbenzidine (3,3'-dimethylbenzidine dye class).
Report on carcinogens : carcinogen profiles, 11, III106-III107 (2004-01-01)
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