hydrogen sulphide

24 µg per capsule

H2S, like boiled or rotten eggs”

Certified soft drinks flavour standard used to train professional tasters to recognize and scale the intensity of H2S character. Hydrogen sulphide can taint soft drinks via contaminated carbon dioxide supplies. It can also arise through microbiological spoilage and through chemical reactions taking place within the product. Hydrogen sulphide imparts an unpleasant sulphury odour to soft drinks, reminiscent of boiled eggs or rotten eggs.

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

Flavour cards

Flavour standard information

Technical specification

Assessment
The best way to reliably detect hydrogen sulphide in soft drinks is as follows. Without covering the glass, swirl the sample to release the aroma. Take a single short sniff. Repeat as necessary while taking great care not to saturate your odour receptors with the flavour.
Amount of flavour per capsule
24 µg per capsule
Threshold
The flavour threshold of hydrogen sulphide in soft drinks is 8 µg / l.
Origins
H2S is a contaminant of carbonated soft drinks which an be Introduced through use of insufficiently-purified carbon dioxide. It can also arise through microbiological spoilage by bacteria, and through chemical reactions involving metal surfaces in caned products.
Importance
Hydrogen sulphide imparts an unpleasant sulphury note to contaminated soft drinks. H2S is easily oxidized to less odour-active species, so its presence is indicative of the failure of water treatment processes or contamination arising during production of soft drinks.
CAS registry number
The CAS registry number for H2S is 7783-06-4.
Other names
  • H2S
  • hydrogen sulfide
  • dihydrogen monosulfide
  • dihydrogen monosulphide
  • hydrogen sulfuric acid
  • hydrogen sulphuric acid
  • sulfur hydride
Remarks
Other sulphur compounds may be found alongside H2S in contaminated carbon dioxide supplies. Be careful not to overexpose yourself to samples with H2S. The more you look for it the less likely you are to find it.
Threshold distribution
Graph
Capsules per pot
10
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