Is Methyl isocyanate (MIC) safe for dogs and cats?
High risk for petsMethyl isocyanate (MIC) is acutely toxic (GHS Category 1-3). Dogs may access through household exposure. Contact veterinarian immediately if exposure suspected.
What is methyl isocyanate (mic)?
The IUPAC name is methylimino(oxo)methane.
Also known as: methylimino(oxo)methane, METHYL ISOCYANATE, Isocyanatomethane, Methane, isocyanato-.
- IUPAC name
- methylimino(oxo)methane
- CAS number
- 624-83-9
- Molecular formula
- C2H3NO
- Molecular weight
- 57.05 g/mol
- SMILES
- CN=C=O
- PubChem CID
- 12228
Risk for dogs
High riskMethyl isocyanate (MIC) is acutely toxic (GHS Category 1-3). Dogs may access through household exposure. Contact veterinarian immediately if exposure suspected.
Risk for cats
High riskMethyl isocyanate (MIC) is acutely toxic (GHS Category 1-3). Cats are particularly vulnerable due to grooming behavior and glucuronidation deficiency.
Regulatory consensus
14 regulatory and scientific bodies have classified Methyl isocyanate (MIC). The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| OSHA | — | Occupational exposure limit | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: negative, 1 positive / 2 negative reports) | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: negative, 1 positive / 2 negative reports) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Eye Dam. 1 (score: very high) | |
| EPA CTX / Skin-Eye | — | Skin Irritation: Skin Irrit. 2 (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Skin Sens. 1 (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Irritation: Skin corrosion/irritation - Category 1 (score: very high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Skin sensitization - Category 1 (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Category 1 (score: very high) | |
| EPA CTX / Skin-Eye | — | Skin Irritation: Category 2 (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Category 1 (score: high) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Eye Dam. 1 (score: very high) | |
| EPA CTX / Skin-Eye | — | Skin Irritation: Skin Irrit. 2 (score: high) | |
| EPA CTX / Skin-Eye | — | Skin Sensitization: Skin Sens. 1 (score: high) |
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 methyl isocyanate (mic)
- 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 Methyl isocyanate (MIC):
-
Safer process chemistry; Green chemistry alternatives; Exposure controls
Trade-offs: Requires R&D investment to redesign synthesis routes; may reduce yield or throughput initially; long-term benefits include reduced waste treatment costs, regulatory compliance, and worker safety; 12 Principles of Green Chemistry framework available.Relative cost: 1.2-2×
Frequently asked questions
Is methyl isocyanate (mic) safe for pets?
Methyl isocyanate (MIC) is acutely toxic (GHS Category 1-3). Dogs may access through household exposure. Contact veterinarian immediately if exposure suspected.
What products contain methyl isocyanate (mic)?
Methyl isocyanate (MIC) appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).
Why do regulators disagree about methyl isocyanate (mic)?
Methyl isocyanate (MIC) has been classified by 14 agencies including OSHA, EPA CTX / Genetox, EPA CTX / Genetox, 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 Methyl isocyanate (MIC) in the pets app
Look up products containing methyl isocyanate (mic), compare to alternatives, and explore the full data record.
Open in pets View raw API dataSources (3)
- Indian Council of Medical Research: Health Effects of the Bhopal Gas Tragedy — Mortality Data, Pulmonary Effects, Reproductive Outcomes, Neurological Effects, Long-term Survivor Cohort (2004) — study
- ATSDR Toxicological Profile: Methyl Isocyanate — Bhopal Disaster Review, Acute Pulmonary Toxicity, Ocular Effects, Chronic Health Effects, Exposure Limits (1993) — regulatory
- Dhara & Dhara: The Union Carbide Disaster in Bhopal — A Review of Health Effects — International Journal of Occupational and Environmental Health; Long-term Epidemiology, Reproductive Effects, Immune Dysregulation (2002) — study
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 →