What is dibutyl hydroxy toluene?
Description. Butylated Hydroxytoluene is an organic chemical composed of 4-methylphenol modified with tert-butyl groups at positions 2 and 6. Butylated hydroxytoluene (BHT) inhibits autoxidation of unsaturated organic compounds.
What is BHA E320?
Butylated hydroxyanisole, also known as BHA, is a synthetic phenolic antioxidant to prevent the rancidity in edible oils & fats-containing food, also a chemical preservative with the European food additive number E320.
How is butylated Hydroxyanisole made?
Butylated hydroxyanisole (BHA) is an antioxidant consisting of a mixture of two isomeric organic compounds, 2-tert-butyl-4-hydroxyanisole and 3-tert-butyl-4-hydroxyanisole. It is prepared from 4-methoxyphenol and isobutylene. It is a waxy solid used as a food additive with the E number E320.
How do you make butylated hydroxytoluene?
Industrial production The chemical synthesis of BHT in industry has involved the reaction of p-cresol (4-methylphenol) with isobutylene (2-methylpropene), catalyzed by sulfuric acid: CH3(C6H4)OH + 2 CH2=C(CH3)2 → ((CH3)3C)2CH3C6H2OH.
What is the full form of BHA?
BHA (butylated hydroxyanisole) and BHT (butylated hydroxytoluene) are closely related synthetic antioxidants used as preservatives in lipsticks and moisturizers, among other cosmetics. They are also widely used as food preservatives.
Is BHA good for dogs?
BHA in the trace amounts used to stabilize fats in food is considered safe by the U.S. Food and Drug Administration and is found in many pet foods and treats as well as in our own foods. There are no substantiated cases of cancer or other illness being caused by BHA in dogs and cats.
What contains butylated Hydroxyanisole?
BHA is added to butter, lard, meats, cereals, baked goods, sweets, beer, vegetable oils, potato chips, snack foods, nuts and nut products, dehydrated potatoes, and flavoring agents.
How much BHT is safe?
0.02 percent
The Food and Drug Administrationconsiders it “generally recognized to be safe”or GRAS, the government’sstandardfor safety as a food additive and preservative. It’s beenapproved for use in various foodsup to0.02 percent or 200 parts per million of the fat or oil contentof the food productwith a couple exceptions.
What is the mobility of toluene in soil?
Rom, W.N. (ed.). Environmental and Occupational Medicine. 2nd ed. Boston, MA: Little, Brown and Company, 1992., p. 1212 TERRESTRIAL FATE: Based on a classification scheme (1), Koc values of 37-178 measured in soil (2,3) indicate that toluene is expected to have high to moderate mobility in soil (SRC).
What are the chemical partition coefficients of toluene?
CHRIS – Hazardous Chemical Data. Volume II. Washington, D.C.: U.S. Government Printing Office, 1984-5. Partition coefficients at 37 °C for toluene into blood = 15.6; into oil = 1,470 Hydroxyl radical rate constant = 5.96X10-12 cu cm/molecule-sec @ 25 °C
What is the concentration of toluene in the atmosphere?
RURAL/REMOTE: Toluene was detected in the atmosphere of 115 remote samples taken in the US at concentrations of 0.057-30 ppb, (0.66 ppb median) (1). Toluene was identified, not quantified, in a forest in Germany (2).
What is the rate constant for the vapor phase reaction of toluene?
The rate constant for the vapor-phase reaction of toluene with photochemically-produced hydroxyl radicals has been measured as 5.96X10-12 cu cm/molecule-sec at 25 °C (1). This corresponds to an atmospheric half-life of about 2 days at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm (2).