Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
2-Hydroxy-4-methoxybenzophenone-5-sulfonic Acid
1. Basic Product Information
Product Name: 2-Hydroxy-4-methoxybenzophenone-5-sulfonic Acid
CAS Number: 4065-45-6
Molecular Formula: C14H12O6S
Molecular Weight: 308.31
Synonyms: Benzophenone-4, BP-4, Sulisobenzone, 5-Benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid
Product Category: Water-soluble broad-spectrum UV absorber, cosmetic sunscreen raw material, water-based coating light stabilizer, aromatic sulfonic fine chemical
2. Physical and Chemical Properties
Physical Indicators
- Appearance: White to pale yellow crystalline powder
- Odor: Faint mild aromatic ketone odor
- Solubility: Freely soluble in water, methanol, ethanol; slightly soluble in acetone; insoluble in ether, alkanes and mineral oil
- Melting Point: 168–172 °C (decomposes)
- Density (20 °C): 1.46 g/cm3
- pH (1% aqueous solution): 1.2–2.2
- Hygroscopicity: Slightly hygroscopic under high humidity air
- Aqueous Stability: Stable under neutral and weakly acidic aqueous systems; prone to discoloration and degradation under strong alkaline heating or long-term UV radiation
Chemical Characteristics
- Molecular Structure: Benzophenone parent skeleton with ortho-hydroxy, para-methoxy and sulfonic acid (-SO3H) groups on the benzene ring; sulfonic acid group endows excellent water solubility compared with oil-soluble oxybenzone (BP-3)
- Core Functional Mechanism: Broad-spectrum UV filter covering UVA + UVB (280–360 nm); converts ultraviolet radiation into low-energy heat to prevent skin photodamage and material photoaging; approved cosmetic UV absorber by FDA and EU cosmetic regulations (max allowable dosage 5%)
- Photostability: Moderately light-sensitive; prolonged strong UV exposure triggers slight yellow discoloration and reduces UV absorption efficiency
- Thermal Stability: Stable below 90 °C; heating above 110 °C accelerates sulfonic acid group desulfurization and generates dark impurities
- Chemical Compatibility: Compatible with water-based cosmetic formulations, surfactants and water-soluble coatings; incompatible with strong oxidants, concentrated strong alkalis and heavy metal ions
3. Main Application Fields
- Core Application: Water-Based Cosmetic Sunscreen Raw Material
Main UV filtering ingredient for aqueous sunscreen lotion, facial essence, transparent spray and children’s sun care products; suitable for alcohol-free and water-based skincare formulas - Water-Borne Coating & Ink Light Stabilizer
Anti-yellowing additive for water-based wood varnish, water-based printing ink and waterborne architectural coatings to extend outdoor service life - Textile UV Finishing Agent
Anti-photoaging auxiliary for cotton, polyester and blended fabrics to improve sunlight resistance - Laboratory Analytical Standard
Broad-spectrum UV reference standard for spectrophotometer calibration and photochemistry research
4. Platform Category & Product Guidance
1) Domestic B2B Platform Category
Recommended Path: Organic Intermediates / Cosmetic Additives
Reason: Water-soluble benzophenone UV absorber exclusively for water-based daily chemical and coating industries
2) English Product Group Dropdown Options
Recommended Selection: Basic Organic Chemicals
Do NOT solely classify as pharmaceutical chemicals; it is cosmetic & industrial light stabilizer raw material
3. Standard Foreign Trade Packaging Specification
1g / 5g nitrogen-sealed amber glass vials for reference standards; 1kg aluminum foil vacuum bags for pharmaceutical pilot production; 25kg double PE-lined lightproof fiber drums for bulk cosmetic grade batches
5. Quality Specification Table
| Test Item | Standard Requirement |
| CAS Number | 4065-45-6 |
| Molecular Formula | C14H12O6S |
| Appearance | White pale crystalline powder without dark brown precipitates |
| HPLC Purity | Cosmetic Grade ≥99.0%, Industrial Grade ≥98.0% |
| Water Content (KF Method) | ≤0.30% |
| Chroma (APHA) | ≤100 |
| Single Unknown Impurity | ≤0.10% |
| Total Related Substances | ≤0.50% |
| Heavy Metals (Pb) | ≤10 ppm |
| Standard Storage Package | Lightproof nitrogen-sealed vacuum aluminum foil bag, cool dry warehouse storage |
...
Product
