tert-Butylcatechol (TBC)
| Formula: | C₁₀H₁₄O₂ |
| CAS Number: | 98-29-3 |
| EC Number (EINECS): | 202-715-3 |
| HS Code: | 29321990 |
| UN Number: | 3077 (environmentally hazardous substance, solid, n.o.s.) |
| IUPAC Name: | 4-(1,1-Dimethylethyl)benzene-1,2-diol |
| Also Known As: | 4-tert-Butylcatechol |
| Molecular Weight, g/mol: | 166.22 |
Typical Specifications
| Appearance: | White to pale yellow crystalline solid |
| Odor: | Phenolic, faint |
| Melting Point, °C: | 33–36 |
| Boiling Point, °C: | 202–204 (at 10 mmHg) |
| Density, g/cm³ (at 20°C): | 1.05 |
| Flash Point, °C: | 124 (closed cup) |
| Solubility: | Slightly soluble in water, soluble in ethanol, acetone, ether |
| Purity, %: | ≥99 |
| Grades Available: | Standard, Technical |
| Packaging: | 25kg drums, 50kg fiber drums, bulk |
Applications / Uses
Primary Applications
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Polymerization inhibitor for unsaturated monomers such as styrene, acrylates, and butadiene
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Used in storage and transport of monomers to prevent unwanted polymerization
Secondary Applications
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Additive in antioxidants for industrial oils and coatings
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Used in chemical synthesis as a stabilizer and intermediate
End Industries Served: Polymers, Plastics, Chemical Manufacturing, Coatings, Industrial Oils
Safety & Handling Information
Hazard Class (GHS): Acute Toxicity (Category 4), Skin Irritant (Category 2), Eye Irritant (Category 2)
Hazard Statements (H-Codes):
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H302: Harmful if swallowed
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H315: Causes skin irritation
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H319: Causes serious eye irritation
Precautionary Statements (P-Codes):
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P264: Wash hands thoroughly after handling
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P280: Wear protective gloves/eye protection
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P301 + P312: IF SWALLOWED – call a POISON CENTER or doctor if you feel unwell
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P305 + P351 + P338: IF IN EYES – rinse cautiously with water for several minutes
Storage Conditions
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Store in a cool, dry, well-ventilated area
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Keep containers tightly closed, away from heat, sparks, and direct sunlight
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Avoid contamination with acids and oxidizing agents
Transport Information
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ADR/RID: Class 9, UN3077, PG III
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IMDG: Class 9, UN3077, Marine Pollutant – Yes
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IATA: Class 9, UN3077