Heptanoic acid

  • Heptanoic
  • Hexanecarboxylic
  • Oenanthic

Colorless, unpleasant rancid -smelling oil

Liquid

0.92 g · cm -3

-10 ° C

222-224 ° C

1 hPa (20 ° C)

4.89 (25 ° C)

  • Poorly in water ( 2.8 g · l-1 at 25 ° C)
  • Soluble in ethanol and diethyl ether

1.4221 at 20 ° C.

Risk

Template: Infobox chemical / molecular formula search available

Enanthic (also oenanthic, in international format Enanthsäure, n- heptanoic acid ), C6H13 -COOH, is a saturated fatty acid or alkane. It is derived from the alkane n -heptane. Its salts and esters are used as Heptanoate or Oenanthate ( generic name: Enantate ) refers. The name comes from Greek οἶνος ( oinos ), the wine, since it was first discovered in the residue of wine yeast. Despite the name similarity is at Enanthic not to tartaric acid.

Properties

Enanthic is an unpleasant odor in water, only slightly soluble, viscous, colorless liquid under standard conditions. Enanthic is combustible, but very difficult to ignite with a flash point of 115 ° C and an ignition temperature of 380 ° C.

Hazards

Enanthic is slightly hazardous for water, also it is corrosive. Inhalation of Enanthic leads to a burning sensation, cough, headache, shortness of breath and nausea, these symptoms may be delayed. Because of the low solubility in water reabsorption occurs mainly through the skin and respiratory tract. The enanthic acid increases the permeability of the skin to other, less common skin materials.

Use

Find use mainly the esters of Enanthic. So have certain esters - in contrast to the free acid - a pleasant smell and are used as fragrances application. The methyl and ethyl esters are used as lubricants and hydraulic fluids.

The glycerol ester glyceroltriheptanoate ( GTH ) is since 12 September 2007, the official EU raw material for the labeling of meat risk. The Enanthic is used as the acid component in esters with alcoholic or phenolic drugs, for example in the norethisterone enantate, an injectable depot progestogen contraception. This increases the half-life and stability of the drugs on the one hand in the metabolism of the first ester bond to be hydrolyzed. Furthermore, the water solubility decreases by the non-polar nature of the alkyl chain of the acid in comparison to a free hydroxy group.

CAS registry number PubChem Vapor pressure Dangerous Substances Directive (67/548/EEC) Triheptanoin Hydrolysis CRC Handbook of Chemistry and Physics
307961
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