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.
Avobenzone
1. Basic Product Information
Product Name: Avobenzone
CAS Number: 70356-09-1
Molecular Formula: C20H22O3
Molecular Weight: 310.39
Synonyms: 1-(4-tert-Butylphenyl)-3-(4-methoxyphenyl)propane-1,3-dione, Butyl Methoxydibenzoylmethane, BMBM
Product Category: Cosmetic broad-spectrum UVA absorber, sunscreen API, dibenzoylmethane light stabilizer, fine aromatic ketone intermediate
2. Physical and Chemical Properties
Physical Indicators
- Appearance: Pale yellow crystalline powder
- Odor: Faint mild aromatic ketone odor
- Solubility: Soluble in ethanol, isopropanol, ethyl acetate, cosmetic ester oils; insoluble in water, glycerin and aliphatic alkanes
- Melting Point: 83–86 °C
- Density (20 °C): 1.08 g/cm3
- Flash Point: >150 °C
- Hygroscopicity: Non-hygroscopic under sealed dry storage
- Aqueous Stability: Stable under neutral and weakly acidic oil systems; prone to photodegradation and isomerization under strong UV radiation or alkaline heating
Chemical Characteristics
- Molecular Structure: Dibenzoylmethane skeleton with tert-butyl substituent and methoxy substituent on two benzene rings, enol-keto tautomeric structure
- Core Functional Mechanism: High-efficiency UVA selective absorber covering full UVA band (320–400 nm); converts ultraviolet energy into heat to block skin photoaging and pigmentation; commonly compounded with UVB absorbers to make full-spectrum sunscreen
- Photostability: Poor photostability; long-term UV irradiation generates inactive degradation impurities, usually matched with photostabilizers in formulations
- Thermal Stability: Stable below 70 °C; sustained heating above 100 °C accelerates tautomeric transformation and decomposition
- Chemical Compatibility: Compatible with cosmetic oils, emulsifiers and neutral pharmaceutical excipients; incompatible with strong oxidants, concentrated strong alkalis and heavy metal ions
3. Main Application Fields
- Core Application: Cosmetic Sunscreen Active Raw Material
Key UVA filter ingredient for sunscreen lotion, facial cream, sun spray and body care products; globally approved cosmetic UV absorber with maximum allowed dosage 5% - Daily Chemical UV Stabilizer
Anti-photoaging additive for high-grade perfumes, lipsticks and color cosmetics to prevent fading - Biochemical Laboratory Reagent
UV standard substance for photochemistry and sunscreen mechanism research
4. Platform Category & Product Group Guidance
1) Domestic B2B Platform Category
Recommended Path: Organic Intermediates / Cosmetic Additives
Reason: Dibenzoylmethane UVA absorber specially used in cosmetic sunscreen formulations
2) English Product Group Dropdown Options
Recommended Selection: Basic Organic Chemicals
Do NOT solely classify as finished pharmaceutical chemicals; it is industrial daily chemical UV filter raw material
3. Standard Foreign Trade Packaging Specification
1g / 5g nitrogen-sealed amber glass vials for reference standards; 1kg aluminum foil vacuum vacuum bags for cosmetic pilot batches; 25kg double PE-lined lightproof fiber drum for mass production
5. Quality Specification Table
| Test Item | Standard Requirement |
| CAS Number | 70356-09-1 |
| Molecular Formula | C20H22O3 |
| Appearance | Uniform pale yellow crystalline powder without dark brown impurities |
| HPLC Purity | Cosmetic Grade ≥99.0%, Reference Standard ≥99.8% |
| Melting Point | 83–86 °C |
| Water Content (KF Method) | ≤0.15% |
| Single Unknown Impurity | ≤0.10% |
| Total Related Substances | ≤0.40% |
| Heavy Metals (Pb) | ≤10 ppm |
| Ash Content | ≤0.05% |
| Standard Storage Package | Lightproof nitrogen-filled vacuum aluminum foil bag, cool dry warehouse storage |
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