Is Hydrogen sulfide safe for dogs and cats?
High risk for petsHydrogen sulfide is acutely toxic (GHS Category 1-3). Dogs may access through household exposure. Contact veterinarian immediately if exposure suspected.
What is hydrogen sulfide?
The IUPAC name is sulfane.
Also known as: sulfane, Hydrosulfuric acid, Dihydrogen sulfide, Dihydrogen monosulfide.
- IUPAC name
- sulfane
- CAS number
- 7783-06-4
- Molecular formula
- H2S
- Molecular weight
- 34.08 g/mol
- SMILES
- S
- PubChem CID
- 402
Risk for dogs
High riskHydrogen sulfide is acutely toxic (GHS Category 1-3). Dogs may access through household exposure. Contact veterinarian immediately if exposure suspected.
Risk for cats
High riskHydrogen sulfide is acutely toxic (GHS Category 1-3). Cats are particularly vulnerable due to grooming behavior and glucuronidation deficiency.
Regulatory consensus
6 regulatory and scientific bodies have classified Hydrogen sulfide. The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| NIOSH | — | IDLH 50 ppm | Immediately Dangerous to Life or Health |
| OSHA | — | PEL 20 ppm ceiling | Permissible Exposure Limit |
| EPA CTX / Skin-Eye | — | Eye Irritation: Serious eye damage/eye irritation - Category 2 (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Category 2A (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Category 6.4A (Category 2A) (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Irritation: Category 6.3B (Category 3) (score: moderate) |
Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.
Where pets encounter hydrogen sulfide
- Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
- Occupational Environments — Factories, Warehouses, Transportation vehicles
Safer alternatives
Lower-risk approaches that achieve a similar outcome to Hydrogen sulfide:
-
Enzyme or biocatalysts where applicable
Trade-offs: Temperature/pH sensitivity. Higher cost for some applications.Relative cost: 1.2-2×
Frequently asked questions
Is hydrogen sulfide safe for pets?
Hydrogen sulfide is acutely toxic (GHS Category 1-3). Dogs may access through household exposure. Contact veterinarian immediately if exposure suspected.
What products contain hydrogen sulfide?
Hydrogen sulfide appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).
Why do regulators disagree about hydrogen sulfide?
Hydrogen sulfide has been classified by 6 agencies including NIOSH, OSHA, EPA CTX / Skin-Eye, EPA CTX / Skin-Eye, EPA CTX / Skin-Eye, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.
See Hydrogen sulfide in the pets app
Look up products containing hydrogen sulfide, compare to alternatives, and explore the full data record.
Open in pets View raw API dataSources (3)
- ATSDR Toxicological Profile for Hydrogen Sulfide (2006) — report
- NIOSH Pocket Guide to Chemical Hazards: Hydrogen Sulfide (2019) — regulatory
- CDC/NIOSH Alert: Preventing Occupational Fatalities from Hydrogen Sulfide in Confined Spaces (2013) — report
Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →