Butylated Hydroxytoluene CAS 128-37-0 BHT (BAGS)
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Antioxidant 264 (BHT) is the "guardian of oxidation protection" in the industrial and livelihood fields, covering dozens of industries from plastics and rubber to food and fuel, helping to provide cost-effective initial oxidation protection, especially suitable for medium and low temperature environments. It is one of the most widely used antioxidants in the world.
128-37-0
C15H24O
220.35
204-881-4
| CAS | 128-37-0 |
| Molecular formula | C15H24O |
| Molecular weight | 220.35 |
| EIENCS | 204-881-4 |
| Form | Powder |
| Melting point | 69-73 °C |
| boling point | 265 °C |
| Density | 1.048 |
| Solubility | insoluble |
| PKA | pKa 14(H2O t = 25 c = 0.002 to 0.01) (Uncertain) |
| Color | white |
| Storage temp | 2-8°C |
Antioxidant 264 (CAS 128-37-0, chemical name: 2,6-di-tert-butyl-4-methylphenol, abbreviated as BHT) is a highly efficient, low toxicity, and low-cost universal phenolic antioxidant. Its core function is to capture free radicals, interrupt chain oxidation reactions, and delay the degradation of materials caused by oxidation.
1. Polymer materials (plastics, rubber, synthetic fibers)
Polyolefin (PP/PE):
Prevent thermal oxidative aging during processing (such as high-temperature degradation during extrusion and injection molding).
Extend the service life of products (such as packaging films, pipes, daily necessities), avoid yellowing, brittleness, and decreased mechanical properties.
Rubber industry:
Protect natural rubber (NR), styrene butadiene rubber (SBR), butadiene rubber (BR), etc., inhibit cross-linking or chain breakage caused by oxidation, and prevent surface cracking and hardening.
Polystyrene (PS) and ABS resin:
Reduce processing discoloration and maintain transparency (especially in PS).
Adhesive and sealant:
Prevent adhesive failure due to oxidation during storage or use (such as pressure-sensitive adhesives, epoxy resin adhesives).
2. Petroleum products and lubricants
Fuel oil (gasoline, aviation kerosene):
Inhibit the formation of gum and sediment during storage, maintain combustion efficiency, and prevent engine carbon deposition.
Lubricating oil/hydraulic oil/transformer oil:
Delay the oxidation and rancidity of oil products, reduce the formation of oil sludge, and protect the metal surface of equipment from corrosion.
Paraffin and Asphalt:
Prevent discoloration and hardening, improve stability.
3. Food and Feed Industry
Food additives (antioxidants):
Applicable foods: oils, fried foods, dehydrated vegetables, dairy products, baked goods, and other easily oxidizable foods.
Function: Delay oil rancidity (sourness), maintain flavor and nutritional value (such as protecting vitamin A/E).
Regulatory restrictions: Must comply with food safety standards of various countries (such as China GB 2760, US FDA 21CFR), with a typical limit of 0.02% -0.2%.
Feed mold prevention and preservation:
Protect the oil and fat components in feed and extend its shelf life.
4. Cosmetics and personal care products
Skincare/hair care products:
Prevent the oxidation and deterioration of fat containing ingredients (such as face cream, lipstick, hair oil), and avoid rancidity odor or discoloration.
Soap type:
Inhibit the oxidation and yellowing of unsaturated fatty acids in soap.
Compound efficiency enhancement:
Often compounded with auxiliary antioxidants (such as phosphites, such as 168) to form a synergistic system (such as "BHT+168"), enhancing high-temperature stability.
Combined with light stabilizers (such as hindered amines) to enhance UV resistance.
Regulatory compliance:
Food/pharmaceutical applications require the use of high-purity (≥ 99.5%) products that comply with FDA, EFSA, and other standards.
Alternative options:
Under high temperature conditions, higher molecular weight hindered phenols (such as antioxidants 1010 and 1076) can be used to reduce volatilization losses.
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