Description

2-Hydrazinobenzenesulfonic Acid is a specialized aromatic sulfonic acid derivative containing a reactive hydrazine group, making it a versatile intermediate for synthesizing complex organic molecules. Its core value lies in its dual functionality, serving as a key building block for dyes, pigments, and pharmaceutical active ingredients. This compound is essential for manufacturers and R&D laboratories in the fine chemical, agrochemical, and pharmaceutical industries seeking to develop high-performance products.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of azo dyes, acid dyes, and reactive dyes, providing color fastness and vibrancy to textiles, leather, and paper.
• Pharmaceutical Synthesis: Used as a building block for creating heterocyclic compounds and active pharmaceutical ingredients (APIs), particularly in the development of drugs with sulfonamide or hydrazine-based structures.
• Agrochemical Production: Serves as an intermediate in the manufacture of herbicides, fungicides, and plant growth regulators, contributing to crop protection solutions.
• Chemical Research & Development: Employed in organic synthesis for coupling reactions and as a reagent to introduce the benzenesulfonic acid moiety into target molecules.
• Photographic Chemicals: Can be utilized in the formulation of certain photographic developers and sensitizers.
• Corrosion Inhibitor Formulation: Acts as a component in specialty chemical blends designed to prevent metal corrosion in industrial systems.

Basic Information

Product Name	2-Hydrazinobenzenesulfonic Acid
CAS No.	91-26-9
Molecular Formula	C6H8N2O3S
Molecular Weight	188.21 g/mol
Synonyms	2-Hydrazinylbenzenesulfonic Acid; o-Hydrazinobenzenesulfonic Acid; Benzenesulfonic acid, 2-hydrazinyl-; 2-Sulfophenylhydrazine; (2-Sulfophenyl)hydrazine; Hydrazinobenzene-2-sulfonic Acid; 2-Hydrazinophenylsulfonic Acid; 1-Hydrazino-2-sulfobenzene
EINECS	202-054-1

Quality Control

Our 2-Hydrazinobenzenesulfonic Acid is produced under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for critical applications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic and easily oxidized nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to prevent moisture absorption and degradation.

Specification

Item	Specification
Appearance	White to light yellow 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)	≤ 10 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

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