Aconitic acid

1,2,3- Propentricarbonsäure

• 4023-65-8 ( trans)
• 585-84-2 ( cis)

Colorless solid

Fixed

Trans: 0.56 g · cm -3

• Trans: 194-195 ° C ( decomposition)
• Cis: 135 ° C.

• PKS1: 2.8 (trans- isomer)
• PKa2: 4.46 (trans- isomer)

Trans: very soluble in water (400 g · l-1 at 20 ° C)

Attention

Identical for both isomers R- and S -phrases R: 36/37/38 S: 26 - 37 As far as possible and common, SI units are used. Unless otherwise noted, the indicated data apply with standard conditions. Template: Infobox chemical / molecular formula search available

Aconitic acid is the common name for 1,2,3- Propentricarbonsäure, an unsaturated organic compound having three carboxylic acid functions. The aconitic acid is present as cis- and the trans-isomer. Its salts are called Aconitate.

Aconitic acid can be produced by sulfuric acid dehydration of citric acid. The cis- aconitic acid is an intermediate in the conversion of citrate to isocitrate by aconitase in the citric acid cycle and glyoxylate cycle. It comes in a free form in the flower Monkshood (Aconitum napellus ), but also in other plants as Common Yarrow ( Achillea millefolium ) and the Christmas rose.

The cis isomer forms very easily an anhydride having a melting point of 75 ° C.