Description

2-Hydroxy-4-Methoxybenzophenone-5-Sulfonic Acid is a key organic intermediate and functional additive, primarily valued for its ability to absorb ultraviolet light. This compound is essential for formulators seeking to enhance the photostability and longevity of products exposed to sunlight. It is a critical raw material for manufacturers in the personal care, coatings, and polymer industries.

Application

• Sunscreen Agent: A primary water-soluble UV-B filter in sunscreens, lotions, and daily wear cosmetic formulations.
• Polymer Stabilizer: Incorporated into plastics, resins, and synthetic fibers to prevent UV-induced degradation and yellowing.
• Coating Additive: Used in paints, varnishes, and industrial coatings to protect underlying substrates from sunlight damage.
• Hair Care Products: Protects hair color and integrity in shampoos, conditioners, and styling products.
• Textile Finishing: Applied to fabrics and textiles to impart UV resistance and improve colorfastness.
• Adhesive & Sealant Formulations: Enhances the durability and weather resistance of adhesive products.

Basic Information

Product Name	2-Hydroxy-4-Methoxybenzophenone-5-Sulfonic Acid
CAS No.	4065-45-6
Molecular Formula	C14H12O6S
Molecular Weight	308.31 g/mol
Synonyms	Benzophenone-4; Sulisobenzone; Uvinul MS-40; 5-Benzoyl-4-hydroxy-2-methoxybenzenesulfonic Acid; 2-Hydroxy-4-methoxybenzophenone-5-sulfonate; 5-Benzoyl-4-hydroxy-2-methoxybenzene-1-sulfonic Acid; (2-Hydroxy-4-methoxyphenyl)(5-sulfophenyl)methanone; Oxybenzone-5-sulfonic Acid
EINECS	223-772-2

Quality Control

Our production of 2-Hydroxy-4-Methoxybenzophenone-5-Sulfonic Acid adheres to stringent quality management protocols. Every batch is tested to ensure it meets high-purity standards suitable for cosmetic and industrial applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to guarantee supply reliability and batch-to-batch consistency.

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 material is hygroscopic (moisture-sensitive); keep the container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Light yellow to off-white powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
pH (1% Solution)	1.5 - 3.5
Heavy Metals (as Pb)	≤ 20 ppm

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