Name: trans,trans-2,4-heptadienal
SKU: B-CI-4313-03-5
Price: 49.00 GBP
Availability: InStock

Product Description

“Rancid oil, like cod liver oil”

Certified cider flavour standard used to train professional beer tasters to recognize and scale the intensity of rancid oil character. Rancid oil notes can form in apples and in juice during storage as a result of enzymic or non-enzymic oxidation of lipids. Materials formed at this time can gives rise to rancid flavour notes during storage of finished cider. The resultng flavour resembles cod liver oil.

Food grade | free from sensory impurities | extensively tested | safe to smell and taste.

IMPORTANCE

2,4-Heptadienal imparts a rancid oil note to cider, reminiscent of cod liver oil. At higher concentrations the odour can be perceived as fishy.

ORIGINS

2,4-Heptadienal is formed in apples and in juice during storage as a result of enzymic or non-enzymic lipid oxidation. Use of materials which have oxidized in this way prior to fermentation leads to development of this rancid oil flavour note in cider after packaging.

HOW TO TASTE

The best way to detect rancid oil flavour notes in cider is as follows. Without covering the glass, swirl the sample to release the aroma. Take a single short sniff. Repeat as necessary.

CAS NUMBER

The CAS registry number of trans,trans-2,4-Heptadienal is 4313-03-5.

Additional Information

Weight	0.05 kg
Dimensions	0.7 × 0.7 × 0.3 cm
process	ingredients, juice extraction
flavour	off-flavour
chemical	aldehydes
capsules per pot	6 capsules
kit format	full pots of capsules
sector	beer