Tertiary Butyl Hydroquinone (TBHQ)
Chemical Formula: C10H14O2
Properties:
1. Appearance: White to pale yellow crystalline powder
2. Odor: Slightly sweet, characteristic
3. Molecular Weight: 166.22 g/mol
4. Density: 1.05-1.15 g/cm³ (at 20°C)
5. Melting Point: 126-130°C
6. Boiling Point: 270-280°C
7. Solubility: Insoluble in water, soluble in ethanol, ether, and most organic solvents
Uses:
1. Food industry: Antioxidant and preservative (E 319)
2. Cosmetics: Antioxidant and stabilizer
3. Pharmaceuticals: Antioxidant and stabilizer
4. Industrial applications: Stabilizer for polymers, rubber, and fuels
Safety and Precautions:
1. Toxicity: Moderately toxic (LD50: 1.4-2.5 g/kg)
2. Irritation: Skin and eye irritation, potential allergic reactions
3. Handling: Wear protective gear, avoid ingestion and inhalation
Regulations:
1. FDA-approved for food use (USA)
2. Listed in the EU Cosmetics Directive (Europe)
3. Regulated by EPA (USA) for pesticide use
Alternative Names:
1. tert-Butylhydroquinone
2. TBHQ
3. 2-(1,1-Dimethylethyl)-1,4-benzenediol
Specifications:
1. Purity: 98% min.
2. Appearance: White to pale yellow powder
3. Assay: 98-102%
