What is epoxy group?
epoxy group ĕp´ŏksē [key], in chemistry, functional group that consists of an oxygen atom joined by single bonds to two adjacent carbon atoms, thus forming the three-membered epoxide ring. It is the functional group of epoxides.
What does glycidol do to your body?
Glycidol is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimen- tal animals. Oral exposure to glycidol caused tumors at many different tissue sites in mice and rats.
Is oxirane the same as epoxide?
A compound containing the epoxide functional group can be called an epoxy, epoxide, oxirane, and ethoxyline. Simple epoxides are often referred to as oxides. Thus, the epoxide of ethylene (C2H4) is ethylene oxide (C2H4O). Many compounds have trivial names; for instance, ethylene oxide is called “oxirane”.
Where does glycidol come from?
Glycidol is a probable carcinogen found in e-cigarette vapor. Propylene oxide is a respiratory irritant and possible carcinogen found in e-cigarette liquid. Notably, the researchers conclude that several of these compounds come from heating the liquid’s solvents, propylene glycol and glycerin.
What is epoxy group content?
Epoxy is the family of basic components or cured end products of epoxy resins. Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers and polymers which contain epoxide groups. The epoxide functional group is also collectively called epoxy. The IUPAC name for an epoxide group is an oxirane.
Why epoxy is used?
From protecting pipelines to sealing warehouse floors, an epoxy surface coating protects surfaces strengthens materials, and protects them from corrosion and decay, making epoxy one of the most widely used industrial finishes.
What is glycidol in food?
A second food contaminant is glycidol which is a probable human carcinogen that has been detected in foodstuffs such as infant formula and margarine. It is an unwanted impurity that is formed during the production of epoxy compounds and pharmaceuticals.
Which of the following is a oxirane?
Answer: Ethylene oxide, called oxirane by IUPAC, is an organic compound with the formula C2H4O. It is a cyclic ether and the simplest epoxide: a three-membered ring consisting of one oxygen atom and two carbon atoms. Ethylene oxide is a colorless and flammable gas with a faintly sweet odor.
How is oxirane formed?
Epoxides (also known as oxiranes) are three-membered ring structures in which one of the vertices is an oxygen and the other two are carbons. The most important and simplest epoxide is ethylene oxide which is prepared on an industrial scale by catalytic oxidation of ethylene by air.
How is glycidol manufactured?
Glycidol is commercially produced by two methods: (1) epoxidation of allyl alcohol with hydrogen peroxide and a catalyst (tungsten or vanadium); and (2) reaction of epichlorohydrin with caustic (Grigor’ev et al., 1979; Yoshida & Koyama, 1992; Richey, 1993; Hutchings et al., 1995).
What is epoxy made of?
The most widely used epoxy resins are diglycidyl ethers of bisphenol A (DGEBPA), obtained by reacting bisphenol A (BPA) with epichlorohydrin (ECH). The molecular weight is controlled by the ratio of ECH:BPA (a high ratio yields a low molecular weight).
What material is epoxy?
Epoxy is a type of polymer, a group of chemical compounds that consist of large molecules with repeating subunits. The molecular structure of polymers give them their toughness and elasticity, making polymers (both natural and manmade ones) ubiquitous in daily life.
What is Glycidol found in?
Glycidol, also known as 2,3-epoxy-1-propanol, is derived from glycidyl esters (GEs) found in fats and oils. Upon intake of GEs through food consumption, it is broken down into glycidol in human digestion. The GEs contaminants are formed at high temperature (above 200°C) during the refining process of vegetable oils.
What does acrylamide mean?
Definition of acrylamide : an amide C3H5NO that is derived from acrylic acid, that polymerizes readily, and that is used in the manufacture of synthetic textile fibers.
What causes acrylamide?
High temperature cooking, such as frying, roasting, or baking, is most likely to cause acrylamide formation. Boiling and steaming do not typically form acrylamide. Acrylamide is found mainly in foods made from plants, such as potato products, grain products, or coffee.
What is the structure of oxirane?
C2H4OEthylene oxide / Formula