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O-Tolidine Sulfate, also known as Ortho-Tolidine Sulfate or 4,4'-Methylenebis(N,N-dimethylaniline) Sulfate, is a chemical compound with the molecular formula C15H20N2·H2SO4. It is a derivative of o-tolidine, a diphenylamine-based compound, and is commonly used as a reagent in various analytical procedures, particularly for the detection and quantification of nitrites in water samples. O-Tolidine Sulfate reacts with nitrites in an acidic environment to form a purple-colored azo dye, which can be measured spectrophotometrically. This reaction is the basis for the widely used Griess-Ilosvay method in water analysis. The compound is also used in the synthesis of dyes and pigments, as well as in the detection of other nitrogen-containing compounds. Due to its potential health risks, including carcinogenic properties, O-Tolidine Sulfate is classified as a hazardous substance and requires proper handling and disposal.

531-20-4

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531-20-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 531-20-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,3 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 531-20:
(5*5)+(4*3)+(3*1)+(2*2)+(1*0)=44
44 % 10 = 4
So 531-20-4 is a valid CAS Registry Number.

531-20-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 20, 2017

Revision Date: Aug 20, 2017

1.Identification

1.1 GHS Product identifier

Product name 4-(4-amino-3-methylphenyl)-2-methylaniline,sulfate

1.2 Other means of identification

Product number -
Other names 3,3'-Tolidine sulfate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:531-20-4 SDS

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