dimethyl disulphide

Technical specification

Assessment

The best way to detect sulphury taints in water 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

360 µg per capsule

Threshold

The flavour threshold of dimethyl disulphide in water is 120 µg / l.

Origins

Dimethyl disulphiide (DMDS) is formed through biochemical decay of grass and vegetation in reservoirs and lakes, or by metabolism of bacteria or moulds.

Importance

Dimethyl disulphide Imparts an unpleasant reduced sulphur note, reminiscent of decaying vegetation. The intensity of the odour can be increased by the presence of other sulphur compounds.

CAS registry number

The CAS registry number for dimethyl disulphide is 624-92-0.

Other names

• DMDS
• dimethyl disulfide
• dimethyl disulfane
• 2,3-dithiabutane
• methyl disulfide
• (methyl dithio) methane
• methyl dithiomethane
• methyldithiomethane
• methyldisulfanylmethane

Remarks

Dimethyl disulphide is often found in association with other sulphur compounds and / or methoxypyrazines in contaminated waters.

Threshold distribution

Capsules per pot

10