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Free lookupCAS 7783-06-4

Hydrogen sulfide

CAS 7783-06-4 · PubChem CID 402 · H2S · 34.08 g/mol

Also called hydrogen sulfide, Hydrosulfuric acid, Dihydrogen sulfide, Dihydrogen monosulfide, Stink DAMP.

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01GHS classification
GHS pictogram: Flammable
Flammable
GHS pictogram: Acute Toxic
Acute Toxic
GHS pictogram: Environmental Hazard
Environmental Hazard

Precautionary statement codes

P203, P210, P222, P260, P271, P273, P280, P284, P304+P340, P316, P320, P377, P381, P391, P403, P403+P233, P405, and P501

Regulation (EC) No 1272/2008 of the European Parliament and of the Councilfetched 2026-08-28

02Physical and chemical properties
Appearance

Colourless compressed liquefied gas with characteristic odour of rotten eggs.

ILO-WHO International Chemical Safety Cards (ICSCs)fetched 2026-08-28

Odour

Strong odor of rotten eggs [Note: Sense of smell becomes rapidly fatigued & can NOT be relied upon to warn of the continuous presense of hydrogen sulfide].

Hazardous Substances Data Bank (HSDB)fetched 2026-08-28

Melting point

no value printed

unsourced — inference candidate

Boiling point

no value printed

unsourced — inference candidate

Flash point

Flammable gas

ILO-WHO International Chemical Safety Cards (ICSCs)fetched 2026-08-28

Auto-ignition temperature

no value printed

unsourced — inference candidate

Flammable limits

no value printed

unsourced — inference candidate

Vapour pressure

no value printed

unsourced — inference candidate

Relative density

no value printed

unsourced — inference candidate

Solubility in water

no value printed

unsourced — inference candidate

Partition coefficient, log Kow

no value printed

unsourced — inference candidate

Viscosity

no value printed

unsourced — inference candidate

03Toxicological information

No published acute toxicity value was found for this substance in the sources we read. On a document, Section 11 would print unsourced — inference candidate rather than an estimate.

This page is the evidence. The document is the deliverable.

Everything above is free and stays free. For $5 the same sourced values are assembled into a 16-section safety data sheet and a print-ready GHS label carrying your company details in Section 1.

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What we read

ILO-WHO International Chemical Safety Cards (ICSCs), Regulation (EC) No 1272/2008 of the European Parliament and of the Council, Hazardous Substances Data Bank (HSDB).

12 sourced records for this substance are in the ledger. Values dated more than 30 days ago are re-fetched on the next document.