Is o-Anisidine safe for babies and kids?
Context-dependent for kids(Babies-specific data is limited; this page draws from human pregnant context.) Pregnancy alters the metabolism and distribution of o-Anisidine, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.
What is o-anisidine?
The IUPAC name is 2-methoxyaniline.
Also known as: 2-methoxyaniline, 2-Anisidine, 2-Aminoanisole, o-Aminoanisole.
- IUPAC name
- 2-methoxyaniline
- CAS number
- 90-04-0
- Molecular formula
- C7H9NO
- Molecular weight
- 123.15 g/mol
- SMILES
- COC1=CC=CC=C1N
- PubChem CID
- 7000
Risk for babies
Context-dependentPregnancy alters the metabolism and distribution of o-Anisidine, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.
No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.
Risk for pregnant and nursing people
Context-dependentPregnancy alters the metabolism and distribution of o-Anisidine, potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.
No specific reproductive toxicity data identified, but pregnancy-specific safety data is limited for most chemicals. Precautionary minimization of exposure is recommended.
Regulatory consensus
13 regulatory and scientific bodies have classified o-Anisidine. The classifications differ — that's the data.
| Agency | Year | Classification | Notes |
|---|---|---|---|
| IARC | 1999 | Group 2B | |
| US EPA | 2000 | probable human carcinogen (Group B2) | |
| EPA CTX / NIOSH | — | potential occupational carcinogen | |
| EPA CTX / NTP RoC | — | Reasonably Anticipated to be a Human Carcinogen | |
| EPA CTX / IARC | — | Group 2A - Probably carcinogenic to humans | |
| EPA CTX / CalEPA | — | Known human carcinogen | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: positive, 6 positive / 5 negative reports) | |
| EPA CTX / Genetox | — | Genotoxicity: positive (Ames: positive, 6 positive / 5 negative reports) | |
| EPA CTX / Skin-Eye | — | Eye Irritation: Category 2B (score: moderate) | |
| EPA CTX / Skin-Eye | — | Skin Irritation: Not classified (score: low) | |
| EPA CTX / Skin-Eye | — | skin irritation: in vivo: Studies Indicate No Significant Irritation (score: low) | |
| EPA CTX / Skin-Eye | — | eye irritation: in vivo: Studies Indicate No Significant Irritation (score: low) | |
| EPA CTX / Skin-Eye | — | skin sensitisation: in vivo (LLNA): Ambiguous (score: not classifiable) |
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 kids encounter o-anisidine
- 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 o-Anisidine:
-
Process redesign to avoid hazardous intermediates
Trade-offs: May require significant R&D investment. Not always feasible.Relative cost: 1.2-2×
Frequently asked questions
What products contain o-anisidine?
o-Anisidine appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).
Why do regulators disagree about o-anisidine?
o-Anisidine has been classified by 13 agencies including IARC, US EPA, EPA CTX / NIOSH, EPA CTX / NTP RoC, 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 o-Anisidine in the baby app
Look up products containing o-anisidine, compare to alternatives, and explore the full data record.
Open in baby View raw API dataSources (2)
- IARC Monographs Volume 73: Some Chemicals That Cause Tumours of the Kidney or Urinary Bladder in Rodents — o-Anisidine Group 2B; Bladder Transitional Cell Carcinoma in Rats; Methemoglobin Formation; CYP Metabolism; Dye/Pigment Intermediate (1999) — iarc_monograph
- US EPA o-Anisidine Assessment: Group B2 Probable Carcinogen; OSHA PEL 0.5 mg/m³ Skin Notation; Azo Dye Manufacturing Intermediate; Methemoglobinemia Acute Toxicity; Cancer Slope Factor; Dermal Absorption Concern (2000) — regulatory
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 →