Description

4,5-Dihydroxybenzene-1,3-Disulphonic Acid is a key organic intermediate and functional building block characterized by its disulfonic acid and dihydroxy substitution pattern. This compound matters for its role as a versatile precursor in the synthesis of dyes, pigments, and specialty chemicals, where its reactive sites enable precise molecular modifications. It is primarily needed by manufacturers in the fine chemical, dye and pigment, and pharmaceutical intermediate industries for creating high-value, performance-driven products.

Application

• Intermediate for the synthesis of azo dyes and reactive dyes used in textiles and inks.
• Key building block in the production of pigments and colorants for industrial applications.
• Precursor for pharmaceutical intermediates and active pharmaceutical ingredients (APIs).
• Used in the manufacture of specialty surfactants and functional polymers.
• Intermediate for photographic chemicals and light-sensitive materials.
• Chelating agent in certain analytical chemistry and metal treatment processes.
• Research and development chemical in organic synthesis laboratories.

Basic Information

Product Name	4,5-Dihydroxybenzene-1,3-Disulphonic Acid
CAS No.	149-46-2
Molecular Formula	C6H6O8S2
Molecular Weight	270.24 g/mol
Synonyms	4,5-Dihydroxy-1,3-benzenedisulfonic Acid; 1,3-Benzenedisulfonic Acid, 4,5-dihydroxy-; Tiron (common name); 4,5-Dihydroxy-m-benzenedisulfonic Acid; Pyrocatechol-3,5-disulfonic Acid; 3,5-Disulfopyrocatechol; 4,5-Dihydroxybenzene-1,3-disulfonate; Tiron Disodium Salt (related salt form)
EINECS	205-741-1

Quality Control

Our 4,5-Dihydroxybenzene-1,3-Disulphonic 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 these results are available upon request to support your quality assurance and regulatory compliance needs.

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 tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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