2,3,5-Trimethylhydroquinone (TMHQ) — Product Profile
Chemical Name：2,3,5-Trimethylbenzene-1,4-diol
Chemical Synonyms：2,3,5-Trimethylhydroquinone; 2,3,5-Trimethyl-1,4-benzenediol; 2,3,5-Trimethylquinol; Pseudocumohydroquinone; ψ-Cumohydroquinone; TMHQ
CAS No.：700-13-0
Molecular Formula：C₉H₁₂O₂
Molecular Weight：152.19 g/mol
Product Properties
White to off-white crystalline powder. Melting point: 168–174 °C. Assay (GC): ≥98.0% (pharma/standard grade); industrial grade up to 99%. Slightly soluble in water (≈2 g/L at 20 °C); soluble in methanol and ethanol. Sensitive to light, air, and oxidizing agents; may darken upon prolonged exposure.
Storage
Store in a tightly sealed container in a cool, dry, dark, and well-ventilated area, away from oxidizing agents. Recommended storage under inert gas for extended stability. Use promptly after opening.
Packing
Standard export packaging: 25 kg fiber drum with inner plastic liner. 25 kg bags on pallets and customized packaging options are available upon request. Smaller quantities (1 kg) available for trial or laboratory use.
Application
Core intermediate for the industrial synthesis of synthetic Vitamin E (α-tocopherol) , acting as the aromatic ring precursor in condensation with isophytol. Also used as a pharmaceutical/medical intermediate and in the production of antioxidants for nutraceutical and cosmetic applications.
Product Specification
| Parameter | Specification |
| Appearance | White to off-white crystalline powder |
| Assay (GC) | ≥98.0% (standard); ≥99.0% (industrial grade available) |
| Melting Point | 168.0–174.0 °C |
| Loss on Drying | ≤0.5% |
| Solubility | Slightly soluble in water; soluble in methanol/ethanol |