Description

2-Hydroxy-4-Methoxybenzophenone-5-Sodium Sulfonate is a water-soluble derivative of the widely used benzophenone class of ultraviolet (UV) light absorbers. This compound is valued for its ability to provide effective broad-spectrum UVB and UVA protection while being compatible with aqueous formulations. It is primarily utilized by manufacturers in the personal care, cosmetic, and pharmaceutical industries seeking to enhance the photostability and shelf-life of their products. Its sodium sulfonate group confers excellent solubility, making it a key ingredient in sunscreens, moisturizers, and other leave-on or rinse-off applications requiring clear, non-greasy finishes.

Application

• Broad-Spectrum Sunscreen Agent: A primary active ingredient in sun care products (SPF creams, lotions, sprays) to protect skin from UV-induced damage.
• Photostabilizer for Cosmetics: Incorporated into day creams, foundations, and lipsticks to prevent the degradation of formulations and active ingredients upon light exposure.
• Hair Care Protection: Used in shampoos, conditioners, and styling products to shield hair color and protein structure from UV radiation.
• Pharmaceutical Formulations: Acts as a stabilizer in topical ointments, gels, and dermatological preparations sensitive to light.
• Functional Textile Finishing: Applied in coatings for fabrics to create UV-protective clothing.
• Industrial Polymer Additive: Enhances the UV resistance of coatings, adhesives, and packaging materials where water-based systems are preferred.

Basic Information

Product Name	2-Hydroxy-4-Methoxybenzophenone-5-Sodium Sulfonate
CAS No.	6628-37-1
Molecular Formula	C14H11NaO6S
Molecular Weight	330.29 g/mol
Synonyms	Benzophenone-4; Sulisobenzone Sodium; 5-Benzoyl-4-hydroxy-2-methoxybenzenesulfonic Acid Sodium Salt; Uvinul MS-40; Escalol 577; 2-Hydroxy-4-methoxybenzophenone-5-sulfonic Acid Sodium Salt; Sodium 5-(Benzoyl)-4-hydroxy-2-methoxybenzenesulfonate; UV Absorber BP-4
EINECS	229-578-5

Quality Control

Our 2-Hydroxy-4-Methoxybenzophenone-5-Sodium Sulfonate is manufactured under a strict quality management system. Every batch is tested to ensure it meets high-purity standards suitable for cosmetic and personal care applications. A comprehensive Certificate of Analysis (COA) is provided with each shipment, detailing key parameters such as assay, impurity profile, and physical characteristics. We ensure compliance with relevant global regulatory frameworks, including REACH.

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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
pH (1% Solution)	6.0 - 8.0
Loss on Drying	≤ 5.0 %
Residue on Ignition (Sulfated Ash)	20.0 - 26.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual ≤ 0.5%, Total ≤ 1.5%

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