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.
p-tert-Butylcatechol
1. Basic Product Information
Product Name: p-tert-Butylcatechol
Abbreviation: TBC / PTBC
Full Name: 4-(1,1-Dimethylethyl)-1,2-benzenediol
CAS Number: 98-29-3
Molecular Formula: C10H14O2
Molecular Weight: 166.22
Synonyms: 4-tert-Butylcatechol, 4-tert-Butylpyrocatechol
Product Category: Polymerization inhibitor, industrial antioxidant, plastic & rubber stabilizer, fine chemical intermediate
2. Physical and Chemical Properties
Physical Indicators
- Appearance: Colorless to pale yellow crystalline flakes
- Odor: Slight mild aromatic phenolic odor
- Solubility: Freely soluble in ethanol, methanol, acetone, benzene, ether, carbon tetrachloride; slightly soluble in hot water, barely soluble in cold water and aliphatic hydrocarbons
- Melting Point: 52–58 °C
- Boiling Point: 284–286 °C (760 mmHg)
- Density (60 °C): 1.049 g/cm3
- Flash Point: 151 °C
- Hygroscopicity: Slightly hygroscopic under high humidity conditions
- Aqueous Stability: Stable in neutral and weakly acidic environments; susceptible to oxidation and discoloration under alkaline, light or heated conditions
Chemical Characteristics
- Molecular Structure: Catechol benzene ring substituted with tert-butyl group at para position, containing two adjacent phenolic hydroxyl groups
- Core Functional Mechanism: Efficient free radical scavenger; strongly inhibits spontaneous polymerization of unsaturated monomers; high-performance antioxidant to delay thermal & oxidative degradation of polymers and oils
- Photostability: Light-sensitive; long-term UV exposure accelerates oxidation and turns product dark brown
- Thermal Stability: Stable below 120 °C; high-temperature decomposition releases irritating phenolic fumes and carbon oxides
- Chemical Compatibility: Compatible with most organic monomers, resins and mineral oils; incompatible with strong oxidizing agents, concentrated strong alkalis and heavy metal salts
3. Main Application Fields
- Core Application: Polymerization Inhibitor for Unsaturated Monomers
Primary stabilizer for styrene, butadiene, isoprene, vinyl acetate and acrylic monomers during storage, transportation and distillation; prevents premature self-polymerization and tar formation - Plastic & Synthetic Rubber Antioxidant
Thermal and oxidation stabilizer for polystyrene, polyester resin, polyurethane foam and synthetic rubber; extends service life and improves processing stability - Industrial Oil & Grease Additive
Antioxidant for mineral lubricating oil, cutting fluid and petrolatum products to slow oil aging and rancidity - Coating & Adhesive Auxiliary
Anti-gelling stabilizer for paints, printing inks and water-based adhesives to avoid cross-linking during storage - Laboratory Synthetic Reagent
Free radical inhibitor for organic synthesis and material preparation experiments
4. Platform Category & Product Group Guidance
1) Domestic B2B Platform Category
Recommended Path: Organic Intermediates / Plastic Additives
Reason: Special industrial phenolic additive mainly used as monomer polymerization inhibitor and polymer antioxidant
2) English Product Group Dropdown Options
Recommended Selection: Basic Organic Chemicals
Do NOT select Pharmaceutical Chemicals; it is general industrial fine chemical additive instead of medical bulk drug
3. Standard Foreign Trade Packaging Specification
1kg sealed PE plastic bottle for lab test samples; 25kg kraft paper bag lined with double PE inner bags for bulk factory orders; light-proof fiber drum packaging available
5. Quality Specification Table
| Test Item | Standard Requirement |
| CAS Number | 98-29-3 |
| Molecular Formula | C10H14O2 |
| Appearance | Uniform pale yellow crystalline flakes without dark impurities |
| HPLC Purity | Industrial Grade ≥98.0%, Reagent Grade ≥99.0% |
| Melting Point | 52–58 °C |
| Water Content (KF Method) | ≤0.20% |
| Heavy Metals (Pb) | ≤10 ppm |
| Ash Content | ≤0.05% |
| Standard Storage Package | Light-proof sealed PE lined kraft bag, dry warehouse storage |
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