Butylated hydroxytoluene (BHT), CAS 128-37-0 (2,6-di-tert-butyl-4-methylphenol, also known as Antioxidant 264), is a low-molecular-weight hindered phenolic antioxidant. It is widely used to protect rubber, plastics, oils and other organic materials against heat and oxygen ageing, and is valued for its high purity and low ash. PolyBlueChem supplies BHT to the specification below with per-batch COA and SDS.
Specifications
| Parameter | Specification |
|---|---|
| Appearance | White crystalline powder |
| Initial melting point | 69 – 70 °C |
| Free phenol | 0.02% max |
| Residue on ignition | 0.005% max |
| Moisture | 0.05% max |
| Sulfide | 0.002% max |
| Arsenide (As) | 1 mg/kg max |
| Heavy metal | 5 mg/kg max |
The low residue on ignition (0.005% max), moisture and free-phenol limits reflect a high-purity grade. A specification sheet and a certificate of analysis for each batch are available on request.
Basic Information
| CAS number | 128-37-0 |
| Synonyms | Butylated hydroxytoluene; BHT; 2,6-di-tert-butyl-4-methylphenol; Antioxidant 264; DBPC |
| Molecular formula | C15H24O |
| Molecular weight | 220.35 g/mol |
| Type | Hindered phenolic antioxidant |
Applications
- Rubber – anti-ageing protection of natural and synthetic rubber.
- Plastics and resins – thermal-oxidative stabilisation of polyolefins, styrenics and other polymers.
- Oils, fuels and lubricants – oxidation inhibitor.
- Food and feed – where a food-grade antioxidant is specified (E321); confirm the grade for your market.
- Adhesives and coatings – stabiliser against ageing.
Packaging and documentation
- 25 kg PP/PE bags or fibre drums (or as agreed); keep sealed, cool and dry.
- Per-batch certificate of analysis (COA) and safety data sheet (SDS).
PolyBlueChem supplies Butylated hydroxytoluene (BHT, CAS 128-37-0) to this specification, with per-batch COA and SDS and FOB/CIF delivery. Contact us with your grade, tonnage and delivery port for a quotation.
