2.0 µg per capsule

Mercaptan, like drains or rotting garbage”

Certified soft drinks flavour standard used to train professional tasters to recognize and scale the intensity of mercaptan character. Methanethiol is introduced to soft drinks through use of contaminated carbon dioxide supplies. It can also arise through microbiological spoilage and non-microbiological chemical reactions. It imparts an unpleasant sulphur note to soft drinks, reminiscent of drains or rotting garbage.

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

Flavour cards

Flavour standard information

Technical specification

The best way to detect mercaptan character 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.
Amount of flavour per capsule
2.0 µg per capsule
The flavour threshold of methanethiol in soft drinks is 330 ng / l.
Methanethiol is a contaminant introduced into carbonated soft drinks through use of insufficiently-purified carbon dioxide. The compound can also arise through microbiological spoilage and through non-microbiological chemical reactions.
Methanethiol imparts an unpleasant sulphury note to soft drinks. The compound is easily oxidized to less odour-active species, so its presence is indicative of the failure of water treatment processes or contamination during production of soft drinks.
CAS registry number
The CAS reference number for methanethiol is 74-93-1.
Other names
  • methyl mercaptan
  • mercaptomethane
  • methane thiol
  • methyl sulfhydrate
  • thiomethanol
  • thiomethyl alcohol
Other sulphur compounds may be found alongside methanethiol in contaminated carbon dioxide supplies. Be careful not to overexpose yourself to samples with methanethiol. The more you look for it the less likely you are to find it.
Threshold distribution
Capsules per pot
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