Baby Safety / Compounds / Geosmin

Is Geosmin safe for babies and kids?

Moderate risk for kids

Infants are more vulnerable to Geosmin than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What is geosmin?

The IUPAC name is (4S,4aS,8aR)-4,8a-dimethyl-1,2,3,4,5,6,7,8-octahydronaphthalen-4a-ol.

Also known as: (4S,4aS,8aR)-4,8a-dimethyl-1,2,3,4,5,6,7,8-octahydronaphthalen-4a-ol, (-)-geosmin, MYW912WXJ4, Octahydro-4alpha,8abeta-dimethyl-4aalpha(2H)-naphthol.

IUPAC name
(4S,4aS,8aR)-4,8a-dimethyl-1,2,3,4,5,6,7,8-octahydronaphthalen-4a-ol
CAS number
19700-21-1
Molecular formula
C12H22O
Molecular weight
182.3 g/mol
SMILES
CC1CCCC2(C1(CCCC2)O)C
PubChem CID
29746

Risk for babies

Moderate risk

Infants are more vulnerable to Geosmin than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.

What to do: Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Risk for pregnant and nursing people

Context-dependent

Pregnancy alters the metabolism and distribution of Geosmin, 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

3 regulatory and scientific bodies have classified Geosmin. The classifications differ — that's the data.

AgencyYearClassificationNotes
WHO2022no carcinogenicity classification; drinking-water taste and odor compound; provisional guideline value 0.010 μg/L based on odor threshold; produced by actinomycetes and cyanobacteria in water sources
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 1 negative reports)
EPA CTX / Genetox—Genotoxicity: negative (Ames: negative, 0 positive / 1 negative reports)

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 geosmin

  • 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 Geosmin:

  • Source reduction; Remediation; Exposure avoidance
    Trade-offs: Exposure reduction does not eliminate the hazard but lowers risk to acceptable levels when alternatives are not available or practical. Requires ongoing monitoring and compliance.
    Relative cost: 1.2-2×

Frequently asked questions

Is geosmin safe for kids?

Infants are more vulnerable to Geosmin than children or adults due to immature hepatic/renal clearance, higher intake-to-body-weight ratio, rapid organ development, and increased gastrointestinal absorption.

What products contain geosmin?

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

What should I do if my child is exposed to geosmin?

Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Why do regulators disagree about geosmin?

Geosmin has been classified by 3 agencies including WHO, EPA CTX / Genetox, EPA CTX / Genetox, 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 Geosmin in the baby app

Look up products containing geosmin, compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (1)
  1. WHO Drinking-water Quality Guidelines 4th Ed 2022: Geosmin Provisional Taste/Odor Guideline 0.010 μg/L; Streptomyces Cyanobacteria Biosynthesis; 5–10 ng/L Water Odor Threshold; Petrichor Evolutionary Significance; PAC GAC Advanced Oxidation Removal; Aquaculture Off-Flavor Depuration (2022) — 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 →