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Merck
CN

89585

o-Tolidine dihydrochloride

≥99.0% (HPLC)

Synonym(s):

3,3′-Dimethylbenzidine dihydrochloride, 4,4′-Bianisidine dihydrochloride, 4,4′-Diamino-3,3′-dimethylbiphenyl dihydrochloride

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About This Item

Linear Formula:
[-C6H3(CH3)-4-NH2]2 · 2HCl
CAS Number:
612-82-8
Molecular Weight:
285.21
EC Number:
210-322-5
UNSPSC Code:
12352100
PubChem Substance ID:
57653347
Beilstein/REAXYS Number:
3713238
MDL number:
MFCD00012960

Key Documents

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InChI key

LUKPNZHXJRJBAN-UHFFFAOYSA-N

InChI

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

SMILES string

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

assay

≥99.0% (HPLC)

Application

Sensitive colorimetric reagent for gold and for free chlorine in water.

Disclaimer

May be carcinogenic.

signalword

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

Not applicable

flash_point_c

Not applicable

ppe

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

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
1373206
S43423
1372939
450041/1
1188835

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3,3'-Dimethylbenzidine.
Report on carcinogens : carcinogen profiles, 10, 104-105 (2004-08-25)
Dyes metabolized to 3,3'-dimethylbenzidine (3,3'-dimethylbenzidine dye class.
Report on carcinogens : carcinogen profiles, 10, 105-106 (2004-08-25)
L E Gray et al.
Fundamental and applied toxicology : official journal of the Society of Toxicology, 20(2), 177-183 (1993-02-01)
In mice and rats, prenatal exposure to the dye Congo red permanently reduces the number of germ cells in male and female offspring. In the current investigation, nine other dyes structurally related to Congo red were examined for developmental testicular
Dyes metabolized to 3,3'-dimethylbenzidine (3,3'-dimethylbenzidine dye class).
Report on carcinogens : carcinogen profiles, 11, III106-III107 (2004-01-01)
Zhijun Cao et al.
Biosensors & bioelectronics, 23(3), 348-354 (2007-06-06)
The electrooxidation of o-tolidine (oTD) was investigated via the electrochemical quartz crystal microbalance (EQCM) technique. The formation and breakage of the poorly soluble charge-transfer complex (CTC) occurred during the redox switching of oTD, and the CTC precipitation on and its
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