Description

o-Toluidine Disulfonic Acid is a key aromatic sulfonic acid derivative, primarily serving as a versatile intermediate in the synthesis of more complex chemical structures. Its value lies in its ability to introduce both sulfonic acid groups and an aromatic amine functionality, making it crucial for creating dyes, pigments, and specialty chemicals. This compound is essential for manufacturers in the dyestuff, pigment, and agrochemical industries, where it is used to build molecules with specific color properties and biological activity.

Application

• Dye and Pigment Manufacturing: A critical intermediate for the synthesis of azo dyes, acid dyes, and organic pigments, contributing to color fastness and solubility.
• Agrochemical Synthesis: Used in the production of certain herbicides, pesticides, and plant growth regulators, leveraging its aromatic structure.
• Pharmaceutical Intermediates: Serves as a building block in the synthesis of specific active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Employed in organic synthesis laboratories for developing novel compounds and material science applications.
• Specialty Surfactants: Can be utilized to produce sulfonated surfactants with specific emulsifying or dispersing properties.
• Photographic Chemicals: Finds application in the synthesis of certain chemicals used in photographic development processes.

Basic Information

Product Name	o-Toluidine Disulfonic Acid
CAS No.	83-83-0
Molecular Formula	C7H9NO6S2
Molecular Weight	267.28 g/mol
Synonyms	2-Aminotoluene-3,5-disulfonic Acid; 3,5-Disulfo-o-toluidine; 2-Methylaniline-3,5-disulfonic Acid; 2-Amino-3,5-dimethylbenzenesulfonic Acid (incorrect but common); Toluene-3,5-disulfonic acid, 2-amino-; o-Toluidine-3,5-disulfonic Acid; 2-Methyl-3,5-benzenedisulfonic acid, 6-amino-; BA Salt (historical trade context)
EINECS	201-507-8

Quality Control

Our o-Tolulidine Disulfonic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. Certificates of Analysis (COA) documenting results from HPLC, titration, and other relevant methods are available for every shipment to guarantee traceability and compliance with your quality requirements.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Off-white to light tan crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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