Benzyl mercaptan — properties & hazards overview
Boiling point
194 °C
Flash point
≈ 82 °C (closed cup)
Odour threshold
Extremely low (ppb range)
Water solubility
Low (~1 g/L)
Toxicity
inhalation/dermal
Flammability
FP ≈ 82 °C
Chronic risk
CNS / hepatic (suspected)
Environmental
acute aquatic toxicity
| Property | Value / Note |
|---|---|
| Chemical formula | C₆H₅CH₂SH |
| Molar mass | 124.2 g/mol |
| Physical state (20 °C) | Colourless to pale-yellow liquid, intense thiol odour |
| Density | 1.06 g/cm³ @ 20 °C |
| Vapour pressure | ≈ 0.05 kPa @ 25 °C |
| Water solubility | Low (~1 g/L); forms emulsions, floats on water |
| Odour | Extremely strong, unpleasant; detectable below 1 ppb |
| Typical uses | Organic synthesis, polymer modification, fragrance intermediates (trace) |
*Values are indicative; always verify with current SDS for design and safety.