Pet Safety / Compounds / Isopropanol (isopropyl alcohol)

Is Isopropanol (isopropyl alcohol) safe for dogs and cats?

High risk for pets

Dogs are commonly exposed to IPA through: licking alcohol-based hand sanitizers (widely available and sometimes left at accessible levels during the pandemic), grooming after flea treatments containing isopropanol, and ingesting rubbing alcohol. Dogs metabolize IPA to acetone, which accumulates and causes CNS depression, respiratory depression, and hypotension. Clinical signs appear rapidly (30–60 min after ingestion): ataxia, vomiting, disorientation, bradycardia. Prognosis is generally good with prompt supportive care. LD50 in dogs is approximately 2.9 g/kg; a small dog licking a pump bottle of hand sanitizer could ingest a clinically significant dose.

What is isopropanol (isopropyl alcohol)?

The IUPAC name is propan-2-ol.

Also known as: propan-2-ol, Isopropyl alcohol, isopropanol, 2-Propanol.

IUPAC name
propan-2-ol
CAS number
67-63-0
Molecular formula
C3H8O
Molecular weight
60.1 g/mol
SMILES
CC(C)O
PubChem CID
3776

Risk for dogs

High risk

Dogs are commonly exposed to IPA through: licking alcohol-based hand sanitizers (widely available and sometimes left at accessible levels during the pandemic), grooming after flea treatments containing isopropanol, and ingesting rubbing alcohol. Dogs metabolize IPA to acetone, which accumulates and causes CNS depression, respiratory depression, and hypotension. Clinical signs appear rapidly (30–60 min after ingestion): ataxia, vomiting, disorientation, bradycardia. Prognosis is generally good with prompt supportive care. LD50 in dogs is approximately 2.9 g/kg; a small dog licking a pump bottle of hand sanitizer could ingest a clinically significant dose.

Risk for cats

High risk

Cats are at risk from IPA through topical flea products containing IPA as a carrier solvent, accidental contact with hand sanitizer, and inappropriate home treatment of wounds with rubbing alcohol. Cats' limited hepatic CYP450 and glucuronidation capacity affects alcohol metabolism kinetics; cats may accumulate acetone more slowly but also clear it less efficiently. Topical application of IPA-containing products over large body surface areas (as a flea treatment or wound irrigation) can produce systemic absorption. ASPCA APCC advises against using rubbing alcohol to treat pets.

Regulatory consensus

16 regulatory and scientific bodies have classified Isopropanol (isopropyl alcohol). The classifications differ — that's the data.

AgencyYearClassificationNotes
IARC—Not classified as a carcinogen
US EPA—Not classified as a carcinogen
NIOSH—IDLH 2,000 ppm
OSHA—PEL 400 ppm
EPA CTX / IARC—Group 3 - Not classifiable as to its carcinogenicity to humans
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 4 positive / 6 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 4 positive / 6 negative reports)
EPA CTX / Skin-Eye—Eye Irritation: Eye Irrit. 2 (score: high)
EPA CTX / Skin-Eye—Eye Irritation: Serious eye damage/eye irritation - Category 2 (score: high)
EPA CTX / Skin-Eye—Eye Irritation: Category 2 (score: high)
EPA CTX / Skin-Eye—Skin Irritation: Not classified (score: low)
EPA CTX / Skin-Eye—Eye Irritation: Eye Irrit. 2 (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)
EPA CTX / Skin-Eye—eye irritation: in vivo: Severe Irritation (score: high)
EPA CTX / Skin-Eye—skin sensitisation: in vivo (non-LLNA): Not likely to be sensitizing (score: low)

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 isopropanol (isopropyl alcohol)

  • 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 Isopropanol (isopropyl alcohol):

  • Physical/mechanical pest control (IPM)
    Trade-offs: More labor-intensive. May not be sufficient for severe infestations.
    Relative cost: 1.2-2×

Frequently asked questions

Is isopropanol (isopropyl alcohol) safe for pets?

Dogs are commonly exposed to IPA through: licking alcohol-based hand sanitizers (widely available and sometimes left at accessible levels during the pandemic), grooming after flea treatments containing isopropanol, and ingesting rubbing alcohol. Dogs metabolize IPA to acetone, which accumulates and causes CNS depression, respiratory depression, and hypotension. Clinical signs appear rapidly (30–60 min after ingestion): ataxia, vomiting, disorientation, bradycardia. Prognosis is generally good with prompt supportive care. LD50 in dogs is approximately 2.9 g/kg; a small dog licking a pump bottle of hand sanitizer could ingest a clinically significant dose.

What products contain isopropanol (isopropyl alcohol)?

Isopropanol (isopropyl alcohol) appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

Why do regulators disagree about isopropanol (isopropyl alcohol)?

Isopropanol (isopropyl alcohol) has been classified by 16 agencies including IARC, US EPA, NIOSH, OSHA, EPA CTX / IARC, 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 Isopropanol (isopropyl alcohol) in the pets app

Look up products containing isopropanol (isopropyl alcohol), compare to alternatives, and explore the full data record.

Open in pets View raw API data

Sources (4)
  1. ATSDR Toxicological Profile for Isopropyl Alcohol (2020) — report
  2. US EPA IRIS: Isopropanol — Reference Dose and Review (1993) — regulatory
  3. American Association of Poison Control Centers: Isopropanol Exposure Data (2022) — report
  4. ASPCA Animal Poison Control Center: Isopropanol Toxicosis in Companion Animals (2019) — 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 →