Description

o-Tolidine Sulfate is a high-purity organic chemical salt primarily used as a critical reagent and intermediate in analytical chemistry and industrial processes. Its primary commercial value lies in its role as a sensitive chromogenic agent for the detection and quantification of chlorine, nitrite, and various oxidizing agents. This compound is essential for manufacturers and laboratories in the water treatment, environmental monitoring, and chemical synthesis sectors. We supply consistent, high-quality material to support reliable and reproducible results in demanding applications.

Application

• Chromogenic Reagent for Chlorine Detection: A key component in test kits and analytical methods for determining free and total chlorine in water and wastewater.
• Nitrite Analysis: Used in colorimetric assays for the determination of nitrite ions in environmental, food, and clinical samples.
• Oxidant Indicator: Serves as a sensitive indicator for various oxidizing agents in chemical process monitoring and quality control.
• Dye and Pigment Intermediate: Acts as a precursor in the synthesis of certain azo dyes and organic pigments.
• Research & Development: Employed in laboratory research for developing new analytical methodologies and sensor technologies.
• Chemical Synthesis: Used as a specialized building block or catalyst in select organic synthesis reactions.

Basic Information

Product Name	o-Tolidine Sulfate
CAS No.	531-20-4
Molecular Formula	C14H20N2·H2SO4
Molecular Weight	344.40 g/mol
Synonyms	3,3'-Dimethylbenzidine Sulfate; o-Tolidine Sulphate; 4,4'-Diamino-3,3'-dimethylbiphenyl Sulfate; 3,3'-Dimethyl-[1,1'-biphenyl]-4,4'-diamine Sulfate; DMB Sulfate; Bianisidine Sulfate; Fast Blue B Base Sulfate
EINECS	208-534-8

Quality Control

Our o-Tolidine Sulfate is manufactured under strict quality management protocols to ensure batch-to-batch consistency and reliability. Each lot undergoes comprehensive analytical testing, including assay, identification, and impurity profiling, to meet exacting standards for reagent-grade chemicals. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white or light gray crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition (Sulfated Ash)	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.