Description

4-Hydroxy-3-Nitro-Benzenesulfonic Acid is a versatile aromatic sulfonic acid derivative, serving as a critical intermediate in the synthesis of dyes, pigments, and specialty chemicals. Its molecular structure, featuring both a sulfonic acid group and a nitro-substituted phenol, makes it a valuable building block for creating compounds with specific color, solubility, and reactivity profiles. This product is essential for manufacturers in the dye and pigment, pharmaceutical, and agrochemical industries seeking reliable, high-purity intermediates for their production processes.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes, acid dyes, and other colorants, particularly for textiles, leather, and paper.
• Pharmaceutical Synthesis: Used as a building block in the manufacture of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Agrochemical Production: Employed in the synthesis of herbicides, pesticides, and plant growth regulators.
• Chemical Research & Development: Serves as a reagent and intermediate in organic synthesis for creating novel sulfonated compounds.
• Photographic Chemicals: Can be utilized in the production of certain photographic developers and sensitizers.
• Corrosion Inhibitor Formulation: Acts as a component in formulations designed to protect metal surfaces.

Basic Information

Product Name	4-Hydroxy-3-Nitro-Benzenesulfonic Acid
CAS No.	6313-34-4
Molecular Formula	C6H5NO6S
Molecular Weight	219.17 g/mol
Synonyms	3-Nitro-4-hydroxybenzenesulfonic acid; 4-Hydroxy-3-nitrobenzenesulphonic acid; Phenol, 4-hydroxy-3-nitro-, sulfonate; 2-Nitro-4-sulfophenol; 5-Nitro-2-hydroxybenzenesulfonic acid; NSC 403754; Benzenesulfonic acid, 4-hydroxy-3-nitro-
EINECS	228-637-5

Quality Control

Our 4-Hydroxy-3-Nitro-Benzenesulfonic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and composition. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment, ensuring full traceability and compliance with your quality assurance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Due to its acidic nature, containers should be kept tightly sealed to prevent moisture absorption and contamination. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Yellow to brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
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.