BHT (2,6-Di-tert-butyl-4-methylphenol)
GB 1900-80 This standard applies to p-cresol – isobutanol as raw materials and concentrated sulfuric acid as a catalyst, alumina as a dehydrating agent, the reaction of a di-2.6 butyl-p-cresol. Used as an antioxidant in food processing.
Structure:
MF: C15H24O MW: 220.36 (in 1977 the international atomic weight)
First, the technical requirements
1 Appearance: white crystal or crystalline powder.
2 2,6 – tert-butyl-p-cresol should meet the following requirements:
Index Name Index
Melting point, ℃ 69.0 ~ 70.0
Moisture,% ≤ 0.1
Burning residue,% ≤ 0.01
Sulfate (SO4 dollars),% ≤ 0.002
Heavy metals (as Pb),% ≤ 0.0004
Arsenic (As),% ≤ 0.0001
Free phenol (of p-cresol,)% ≤ 0.02