Триацетин

Описание

§ 184.1901(a) Triacetin (C8H14O6), also known as 1,2,3-propanetriol triacetate or glyceryl triacetate, is the triester of glycerin and acetic acid. Triacetin can be prepared by heating glycerin with acetic anhydride alone or in the presence of finely divided potassium hydrogen sulfate. It can also be prepared by the reaction of oxygen with a liquid-phase mixture of allyl acetate and acetic acid using a bromide salt as a catalyst.

Химические свойства

Triacetin is a colorless, viscous liquid with a slightly fatty odor.

Вхождение

Reported found in papaya.

Использование

As fixative in perfumery; solvent in manufacture of celluloid, photographic films. Technical triacetin (a mixture of mono-, di-, and small quantities of triacetin) as a solvent for basic dyes, particularly indulines, and tannin in dyeing.

Определение

ChEBI: A triglyceride obtained by acetylation of the three hydroxy groups of glycerol. It has fungistatic properties (based on release of acetic acid) and has been used in the topical treatment of minor dermatophyte infections.

Подготовка

By direct reaction of glycerol with acetic acid in the presence of Twitchell’s reagent, or in benzene solution of glycerol and boiling acetic acid in the presence of a cationic resin (Zeo-Karb H) pretreated with dilute H2SO4.

Методы производства

Triacetin is prepared by the esterification of glycerin with acetic anhydride.

Общее описание

Triacetin is a triester of glycerin and acetic acid that occurs naturally in papaya. It is mainly used as a synthetic flavoring agent in ice-creams, nonalcoholic beverages and baked goods.

Фармацевтические приложения

Triacetin is mainly used as a hydrophilic plasticizer in both aqueous and solvent-based polymeric coating of capsules, tablets, beads, and granules; typical concentrations used are 10–35% w/w.
Triacetin is used in cosmetics, perfumery, and foods as a solvent and as a fixative in the formulation of perfumes and flavors.

Контактные аллергены

Triacetin is a component of cigarette filters, which induced a contact dermatitis in a worker at a cigarette manufactory.

Клиническое использование

Glyceryl triacetate (Enzactin, Fungacetin) is a colorless, oilyliquid with a slight odor and a bitter taste. The compound issoluble in water and miscible with alcohol and most organicsolvents.
The activity of triacetin is a result of the acetic acid releasedby hydrolysis of the compound by esterases presentin the skin. Acid release is a self-limiting process becausethe esterases are inhibited below pH 4.

Профиль безопасности

Poison by ingestion. Moderately toxic by intraperitoneal, subcutaneous, and intravenous routes. An eye irritant. Combustible when exposed to heat, flame, or powerful oxidizers. To fight fire, use alcohol foam, water, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes.

Безопасность

Triacetin is used in oral pharmaceutical formulations and is generally regarded as a relatively nontoxic and nonirritant material at the levels employed as an excipient.
LD50 (dog, IV): 1.5 g/kg
LD50 (mouse, IP): 1.4 g/kg
LD50 (mouse, IV): 1.6 g/kg
LD50 (mouse, oral): 1.1 g/kg
LD50 (mouse, SC): 2.3 g/kg
LD50 (rabbit, IV): 0.75 g/kg
LD50 (rat, IP): 2.1 g/kg
LD50 (rat, oral): 3 g/kg
LD50 (rat, SC): 2.8 g/kg

в пробирке

Litton Bionetics, Inc. (1976) evaluated the mutagenic potential of Triacetin in a plate test using Salmonella typhimurium strains TA1535, TA1537, and TA1538 with and without metabolic activation. Test concentrations were 0.0013%, 0.00065%, and 0.000325% and the solvent was dimethyl sulfoxide (DMSO). A negative control (solvent) and appropriate positive controls were used and gave expected results. Triacetin was not mutagenic with or without metabolic activation.
Unichema Chemie B.V. (1994) reported that Triacetin was not mutagenic at 50 to 5000 μg/plate in an Ames test using S. typhimurium strains TA1535, TA1537, TA98, and TA100 with and without metabolic activation.

хранилище

Triacetin is stable and should be stored in a well-closed, nonmetallic container, in a cool, dry place.

Несовместимости

Triacetin is incompatible with metals and may react with oxidizing agents. Triacetin may destroy rayon fabric.

Регуляторный статус

GRAS listed. Accepted in Europe as a food additive in certain applications. Included in the FDA Inactive Ingredients Database (oral capsules and tablets and gels). Included in nonparenteral medicines licensed in the UK. Included in the Canadian List of Acceptable Non-medicinal Ingredients.