Description

Stilbene Disulfonic Acid is a high-purity, synthetic organic intermediate characterized by its distinct aromatic disulfonic acid structure. This compound is valued for its role as a key building block in the synthesis of optical brighteners, fluorescent dyes, and advanced functional materials. It is essential for manufacturers and R&D laboratories in the dyes and pigments, paper, detergent, and textile industries seeking to enhance product whiteness and luminosity.

Application

• Primary Intermediate for Optical Brightening Agents (OBAs): A critical raw material in the synthesis of stilbene-based fluorescent whitening agents used in detergents, papers, and textiles.
• Fluorescent Dye Synthesis: Serves as a precursor for manufacturing specialized fluorescent dyes and tags for analytical and diagnostic applications.
• Polymer and Coating Additives: Incorporated into polymers and coatings to impart fluorescence or UV-absorbing properties.
• Research & Development: Used in organic synthesis and material science research to develop new photoluminescent compounds.
• Paper and Pulp Industry: Employed in the production of high-brightness paper grades.
• Textile Finishing: Used in formulations to achieve bright, white finishes on fabrics and fibers.

Basic Information

Product Name	Stilbene Disulfonic Acid
CAS No.	38622-12-7
Molecular Formula	C14H12O6S2
Molecular Weight	340.37 g/mol
Synonyms	4,4'-Stilbenedisulfonic Acid; trans-Stilbene-4,4'-disulfonic Acid; (E)-Stilbene-4,4'-disulfonic Acid; 4,4'-(E)-Ethene-1,2-diyl)dibenzenesulfonic Acid; Stilbene-4,4'-disulphonic Acid; DSD Acid (common industry abbreviation); NSC 404107; 1,1'-(1,2-Ethenediyl)bis[4-benzene sulfonic acid]
EINECS	Contact for details

Quality Control

Our Stilbene Disulfonic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements of industrial and research applications. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are provided with every shipment and are available upon request.

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). This product is hygroscopic (moisture-sensitive); ensure containers are sealed tightly after use to prevent absorption of atmospheric moisture. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility	Soluble in water, alkaline solutions; slightly soluble in organic solvents

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