Description

4-Hydroxy-3,5-Dinitrobenzenesulphonic Acid is a specialized aromatic sulfonic acid derivative, valued for its role as a versatile chemical intermediate in advanced synthesis. Its molecular structure, featuring both nitro and sulfonic acid groups, makes it a key precursor for the production of dyes, pigments, and other functional materials. This compound is essential for manufacturers and R&D laboratories in the fine chemical, agrochemical, and specialty polymer sectors seeking to develop high-performance products.

Application

• Dye and Pigment Intermediate: A crucial building block in the synthesis of azo dyes and other complex colorants.
• Agrochemical Synthesis: Used in the manufacture of certain herbicides and plant growth regulators.
• Pharmaceutical Intermediate: Serves as a precursor in the synthesis of specific active pharmaceutical ingredients (APIs).
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers for ion-exchange resins or specialty coatings.
• Chemical Research: A valuable reagent in organic synthesis laboratories for introducing nitro and sulfonate functionalities.
• Corrosion Inhibitor Formulation: Used in the development of advanced corrosion inhibitors for industrial applications.

Basic Information

Product Name	4-Hydroxy-3,5-Dinitrobenzenesulphonic Acid
CAS No.	67329-16-2
Molecular Formula	C6H4N2O8S
Molecular Weight	264.17 g/mol
Synonyms	3,5-Dinitro-4-hydroxybenzenesulfonic Acid; 4-Hydroxy-3,5-dinitrobenzenesulfonic Acid; 2,6-Dinitro-4-sulfophenol; Phenol, 2,6-dinitro-4-sulfo-; Benzenesulfonic acid, 4-hydroxy-3,5-dinitro-; DNBSA (abbreviation); 3,5-Dinitro-4-hydroxybenzene-1-sulfonic acid
EINECS	Contact for details

Quality Control

Our 4-Hydroxy-3,5-Dinitrobenzenesulphonic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment.

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 reducing agents. Recommended storage temperature is 15-25°C. The product is light-sensitive and should be stored away from light.

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.