BHT
General
Systematic name	2,6-bis(1,1-dimethylethyl)-4-methylphenol
Other names	2,6-di-‘’tert’’-butyl-4-methylphenol butylated hydroxytoluene BHT
Molecular formula	C15H24O
SMILES	CC(C)(C)c1c(O)c(C(C)(C)C)cc(C)c1
Molar mass	220.35 g/mol
Appearance	white powder
CAS number	[128-37-0] [58500-82-6]
Properties
Density and phase	1.048 g/cm3, solid
Solubility in water	insol.
Melting point	70-73 °C
Boiling point	265 °C (538.15 K)
Acidity (pKa)	?
Basicity (pKb)	?
Hazards
MSDS	External MSDS
Main hazards	?
NFPA 704
Flash point	127 °C
R/S statement	R: 22-36 37 38 S: 26-36
RTECS number	GO7875000
Related compounds
Related compounds	butylated hydroxyanisole
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

BHT is the common abbreviation for butylated hydroxytoluene. BHT is a fat-soluble organic compound primarily used as an antioxidant food additive (E number E321). It also used as an antioxidant in cosmetics, pharmaceutical drugs, jet fuels, rubber and petroleum products, and embalming fluid. Image File history File links 2,6-Bis(1,1-dimethylethyl)-4-methylphenol created with ChemDraw Ultra 7. ... IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... The simplified molecular input line entry specification or SMILES is a specification for unambiguously describing the structure of chemical molecules using short ASCII strings. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid. ... In chemistry and biochemistry, acid dissociation constant, the acidity constant, or the acid-ionization constant (Ka) is a specific type of equilibrium constant that indicates the extent of dissociation of hydrogen ions from an acid. ... In chemistry and biochemistry, acid dissociation constant, the acidity constant, or the acid-ionization constant (Ka) is a specific type of equilibrium constant that indicates the extent of dissociation of hydrogen ions from an acid. ... A material safety data sheet or MSDS is a form containing data regarding the properties of a particular substance. ... Worker safety and health is the prevention and reduction of the number of occupational safety and health hazards at the places of employment, providing safe and healthful working conditions. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... The flash point of a fuel is the lowest temperature at which it can form an ignitable mix with air. ... Risk and Safety Statements, also known as R/S statements, R/S numbers, R/S phrases, and R/S sentences, is a system of hazard codes and phrases for labeling dangerous chemicals and compounds. ... R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ... S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ... RTECS, also known as Registry of Toxic Effects of Chemical Substances, is a database of toxicity information compiled from the open scientific literature that is available for charge. ... Butylated hydroxyanisole (BHA) is a mixture of two isomeric organic compounds, 2-tert-butyl-4-hydroxyanisole and 3-tert-butyl-4-hydroxyanisole. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... An organic compound is any member of a large class of chemical compounds whose molecules contain carbon, with the exception of carbides, carbonates, carbon oxides and gases containing carbon. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Food additives are substances added to food to preserve it or improve its flavor and appearance. ... For the mathematical constant see: E (mathematical constant). ... Closeup of a womans eye while wearing makeup Cosmetics or makeup are substances to enhance the beauty of the human body, apart from simple cleaning. ... Jet fuel (Flying petrol) is a type of aviation fuel designed for use in jet-engined aircraft. ... Rubber is an elastic hydrocarbon polymer which occurs as a milky emulsion (known as latex) in the sap of a number of plants but can also be produced synthetically. ... Pumpjack pumping an oil well near Sarnia, Ontario Petroleum (from Greek petra – rock and elaion – oil or Latin oleum – oil ), crude oil, sometimes colloquially called black gold or Texas Tea, is a thick, dark brown or greenish liquid. ... Embalming, in most modern cultures, is the art and science used to temporarily preserve human remains to forestall decomposition and make it suitable for display at a funeral. ...

BHT is produced by the reaction of p-cresol with isobutylene. It was patented in 1947 and received approval of the Food and Drug Administration for use as a food additive and preservative in 1954. BHT reacts with free radicals, slowing the rate of autoxidation in food, preventing changes in the food's color, odor, and taste. Cresols are organic chemical compounds which are methylphenols. ... 1-butene cis-2-butene trans-2-butene methylpropene There are four alkenes which have four carbon atoms and one double bond in their chemical structure. ... A patent is a set of exclusive rights granted by a state to a person for a fixed period of time in exchange for the regulated, public disclosure of certain details of a device, method, process or composition of matter (substance) (known as an invention) which is new, inventive, and... 1947 (MCMXLVII) was a common year starting on Wednesday (link will take you to calendar). ... To meet Wikipedias quality standards, this article or section may require cleanup. ... 1954 (MCMLIV) was a common year starting on Friday of the Gregorian calendar. ... In chemistry free radicals are uncharged atomic or molecular species with unpaired electrons or an otherwise open shell configuration. ... The most fundamental reactions in chemistry are the redox processes. ...

In the chemical industry it is added to tetrahydrofuran and diethyl ether in order to inhibit the formation of dangerous organic peroxides. Tetrahydrofuran, also known as THF, hydrofuran, oxolane, oxacyclopentane, or furanidine, is a heterocyclic organic compound. ... Flash point -45 °C Autoignition temperature 170 °C R/S statement R: 12-19-22-66-67 S: 9-16-29-33 RTECS number KI5775000 Supplementary data page Structure and properties n, εr, etc. ... Organic peroxides are organic molecules containing the peroxide functional group ROOR If the R is hydrogen, the compound is called organic hydroperoxide. ...

Controversy

Serious concerns have been raised about the use of BHT in food products. BHT is a suspected mutagen and carcinogen. There have been cases in which some individuals have had difficulty metabolizing BHT, resulting in health and behavior changes. In biology, a mutagen (Latin, literally origin of change) is an agent that changes the genetic information (usually DNA) of an organism and thus increases the number of mutations above the natural background level. ... In pathology, a carcinogen is any substance or agent that promotes cancer. ...

BHT has been banned for use in food in the United Kingdom, Japan (1958), Romania, Sweden, and Australia. The US has barred it from being used in infant foods. However some food industries have eliminated it from their products including McDonald's as of 1986. 1958 (MCMLVIII) was a common year starting on Wednesday of the Gregorian calendar. ... McDonalds Corporation (NYSE: MCD) is the worlds largest chain of fast-food restaurants. ... 1986 (MCMLXXXVI in Roman) is a common year starting on Wednesday of the Gregorian calendar. ...

External links

• Why are BHA and BHT in foods? Are they safe?
• Bioassay of BHT, includes structure
• BUTYLATED HYDROXYTOLUENE (ICSC)
• Butylated Hydroxytoluene (BHT) Antioxidant