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.
4-Methoxyphenol
1. Basic Product Information
Product Name: 4-Methoxyphenol
CAS Number: 150-76-5
Molecular Formula: C7H8O2
Molecular Weight: 124.14
Synonyms: p-Methoxyphenol, 4-Hydroxyanisole, Mequinol
Product Category: Polymer inhibitor, cosmetic UV stabilizer, aromatic fine chemical, pharmaceutical intermediate, analytical reagent
2. Physical and Chemical Properties
Physical Indicators
- Appearance: White to pale off-white crystalline flakes
- Odor: Mild phenolic sweet odor
- Solubility: Soluble in ethanol, methanol, acetone, ether and hot water; slightly soluble in cold water; insoluble in aliphatic hydrocarbons
- Melting Point: 55–57 °C
- Boiling Point: 243–245 °C (760 mmHg)
- Density (20 °C): 1.11 g/cm3
- Flash Point: 130 °C
- Hygroscopicity: Non-hygroscopic under sealed dry storage
- Aqueous Stability: Stable under neutral and weakly acidic environments; easily oxidized to dark quinone impurities under alkaline, high temperature or long-term air exposure
Chemical Characteristics
- Molecular Structure: Para-substituted phenol with methoxy group on benzene ring
- Core Functional Mechanism: Efficient free radical polymerization inhibitor; phenolic hydroxyl group provides hydrogen donor to terminate free radical chain reaction; also used as skin lightening active raw material and synthetic intermediate
- Photostability: Light-sensitive; UV irradiation accelerates oxidative discoloration
- Thermal Stability: Stable below 100 °C; prolonged heating above 120 °C generates oxidized colored byproducts
- Chemical Compatibility: Compatible with polar organic solvents and most cosmetic raw materials; incompatible with strong oxidants, concentrated strong alkalis and heavy metal salts
3. Main Application Fields
- Core Application: Polymerization Inhibitor
Main storage stabilizer for acrylic monomers, vinyl monomers, styrene and unsaturated resins to prevent self-polymerization during transportation and storage - Cosmetic Skin Lightening Raw Material
Skin depigmentation active ingredient added to whitening skincare formulations to inhibit melanin synthesis - Pharmaceutical Synthetic Intermediate
Building block for manufacturing anti-inflammatory, antibacterial and antioxidant pharmaceutical derivatives - Dye & Fragrance Intermediate
Precursor for synthesizing aromatic esters, food flavors and organic colorants - Laboratory Analytical Reagent
Phenolic antioxidant standard for free radical inhibition research
4. Platform Category & Product Group Guidance
1) Domestic B2B Platform Category
Recommended Path: Organic Intermediates / Polymer Additives
Reason: Multi-purpose para-methoxyphenol monomer inhibitor and cosmetic fine chemical raw material
2) English Product Group Dropdown Options
Recommended Selection: Basic Organic Chemicals
Do NOT solely classify as pharmaceutical chemicals; it is universal industrial stabilizer intermediate
3. Standard Foreign Trade Packaging Specification
1kg aluminum foil vacuum bag for lab synthesis tests; 25kg double PE-lined lightproof fiber drum for bulk factory orders
5. Quality Specification Table
| Test Item | Standard Requirement |
| CAS Number | 150-76-5 |
| Molecular Formula | C7H8O2 |
| Appearance | Uniform white crystalline flakes without dark brown impurities |
| HPLC Purity | Inhibitor Grade ≥99.0%, Cosmetic Grade ≥99.5% |
| Melting Point | 55–57 °C |
| Water Content (KF Method) | ≤0.20% |
| Chroma (APHA) | ≤50 |
| Heavy Metals (Pb) | ≤10 ppm |
| Ash Content | ≤0.05% |
| Standard Storage Package | Lightproof sealed aluminum foil bag, dry ventilated warehouse storage |
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