Total Reduced Sulphur (TRS)

Environmental Sources

Total reduced sulphur (TRS) refers to the combined concentration of sulphur in air from hydrogen sulphide, carbonyl sulphide, methyl mercaptan, ethyl mercaptan, dimethyl sulphide, and carbon disulphide. TRS compounds produce offensive odours similar to rotten eggs or cabbage. Industrial sources of TRS include the steel industry, pulp and paper mills, refineries and sewage treatment facilities.

Human Health effects

The human health effects of TRS compounds vary with concentration and depend upon the sensitivity, age, and physical condition of the individual. At concentrations as low as 10 parts per million (ppm) TRS can produce eye irritation. Some other common physical complaints include fatigue, nausea, insomnia, headache, and dizziness. Long-term exposure to low-level concentrations of TRS compounds may cause chronic health effects.

Exposure limits

The exposure limits of the total reduced sulphurs vary from compound to compound. Refer to the specific sulphur compounds for their exposure limits.

Sources & Links:

www.atsdr.cdc.gov/HAC/PHA/dakcity/dak_p2.html

www.airqualityontario.com/science/pollutants/trs.cfm

Back to chemical profiles