Baby Safety / Compounds / 4-Chloro-o-toluidine

Is 4-Chloro-o-toluidine 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 4-Chloro-o-toluidine, 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 4-chloro-o-toluidine?

The IUPAC name is 4-chloro-2-methylaniline.

Also known as: 4-chloro-2-methylaniline, 4-Chloro-2-toluidine, RefChem:912425, 2-Amino-5-chlorotoluene.

IUPAC name
4-chloro-2-methylaniline
CAS number
95-69-2
Molecular formula
C7H8ClN
Molecular weight
141.6 g/mol
SMILES
CC1=C(C=CC(=C1)Cl)N
PubChem CID
7251

Risk for babies

Context-dependent

Pregnancy alters the metabolism and distribution of 4-Chloro-o-toluidine, 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.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Risk for pregnant and nursing people

Context-dependent

Pregnancy alters the metabolism and distribution of 4-Chloro-o-toluidine, 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.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

8 regulatory and scientific bodies have classified 4-Chloro-o-toluidine. The classifications differ — that's the data.

AgencyYearClassificationNotes
IARC2010Group 1
US EPA2010likely human 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 (single report) (Ames: None, 1 positive / 0 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (single report) (Ames: None, 1 positive / 0 negative reports)
EPA CTX / Skin-Eye—Skin Sensitization: SkinSens1 (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 kids encounter 4-chloro-o-toluidine

  • 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 4-Chloro-o-toluidine:

  • 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: 2-5×

Frequently asked questions

What products contain 4-chloro-o-toluidine?

4-Chloro-o-toluidine appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

Why do regulators disagree about 4-chloro-o-toluidine?

4-Chloro-o-toluidine has been classified by 8 agencies including IARC, US EPA, EPA CTX / NTP RoC, EPA CTX / IARC, EPA CTX / CalEPA, 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 4-Chloro-o-toluidine in the baby app

Look up products containing 4-chloro-o-toluidine, compare to alternatives, and explore the full data record.

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Sources (3)
  1. IARC Monographs Volume 99: 4-Chloro-o-Toluidine — Group 1; Bladder Cancer in German Chemical Plant Workers; Chlordimeform Manufacturing Cohort; Aromatic Amine Mechanism (2010) — iarc_monograph
  2. Stasik: Carcinoma of the Urinary Bladder in a 4-Chloro-o-Toluidine Cohort — Key Epidemiological Study; German Chemical Manufacturing Workers; Bladder Cancer Excess (1988) — study
  3. ECHA REACH Restriction: 4-Chloro-o-Toluidine in Textile Articles — Aromatic Amine Bladder Carcinogen; Concentration Limits; Azo Dye Cleavage Products; EU Textile Regulations (2014) — 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 →