Allyl Mercaptan (allyl thiol) — properties & hazards overview

Name: Allyl mercaptan Formula: C₃H₆S CAS: 870-23-5 UN: (varies; treat as flammable toxic liquid)
WARNING — extremely strong odour at ppb, flammable vapours; water alone is usually insufficient. Use alkaline + oxidant scrubbing with ORP control, then carbon polishing. ATEX throughout.
Boiling point
~ 90–95 °C
Odour threshold
Extremely low (garlic/sulfur)
Water solubility
Low–moderate
LEL–UEL
Flammable range (indicative)
Toxicity
irritant / odour-driven
Flammability
high
Chronic risk
generally low
Environmental
odour nuisance
PropertyValue / Note
ReactivityThiol; readily oxidised to disulfides/sulfonates. Strong odourant at trace levels.
Absorption chemistryAlkaline conditions improve capture; oxidation greatly increases overall removal.
MaterialsFRP, PP, PE; compatible stainless with care. When using chlorinated oxidants, check corrosion and elastomers.
Typical usesFlavour/fragrance chemistry, research intermediates.

*Even trace emissions can trigger complaints — design for odour control, not just concentration limits.

Get in touch with our scrubber specialist

Boost your industrial processes with our advanced wet gas scrubbers. Our specialist is ready to guide you towards efficiency, productivity, and environmental compliance. Connect with us now for expert advice, custom solutions, and quick responses. Let's find your perfect scrubber solution today.

Contact us