Description

4-Hydroxy-3-Nitrobenzenesulphonic Acid is a versatile aromatic sulfonic acid derivative, serving as a critical intermediate in the synthesis of dyes, pigments, and specialty chemicals. Its nitro and sulfonic acid functional groups make it a valuable precursor for creating complex molecular structures with specific color and solubility properties. This compound is essential for manufacturers in the dye, pharmaceutical, and agrochemical industries seeking reliable, high-purity intermediates for their production processes.

Application

• Dye and Pigment Intermediate: A key building block in the synthesis of azo dyes, acid dyes, and other colorants.
• Pharmaceutical Synthesis: Used as a precursor in the manufacture of certain active pharmaceutical ingredients (APIs) and fine chemicals.
• Agrochemical Production: Employed in the synthesis of herbicides, pesticides, and other crop protection agents.
• Chemical Research & Development: Serves as a reagent in organic synthesis for introducing sulfonic acid and nitro functional groups.
• Photographic Chemicals: Can be utilized in the production of certain light-sensitive compounds.
• Corrosion Inhibitor Formulation: Acts as a component in specialty chemical blends for metal surface treatment.

Basic Information

Product Name	4-Hydroxy-3-Nitrobenzenesulphonic Acid
CAS No.	616-85-3
Molecular Formula	C6H5NO6S
Molecular Weight	219.17 g/mol
Synonyms	3-Nitro-4-hydroxybenzenesulfonic acid; 4-Hydroxy-3-nitrobenzenesulfonic acid; 2-Nitro-4-sulfophenol; Phenol, 2-nitro-4-sulfo-; NSC 40344; 3-Nitro-4-phenolsulfonic acid; 4-Hydroxy-3-nitrobenzene-1-sulfonic acid; 2-Nitro-4-hydroxybenzenesulfonic acid
EINECS	210-500-6

Quality Control

Our 4-Hydroxy-3-Nitrobenzenesulphonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. Certificates of Analysis (COA) detailing the results of tests such as assay, moisture content, and heavy metals are provided with every shipment to guarantee traceability and batch-to-batch consistency for your critical applications.

Storage

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

Specification

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