Baby Safety / Compounds / Copper naphthenate (wood preservative)

Is Copper naphthenate (wood preservative) safe for babies and kids?

Moderate risk for kids

Infants are more vulnerable to Copper naphthenate (wood preservative) 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 copper naphthenate (wood preservative)?

The IUPAC name is 5-(methylamino)-2-phenyl-4-[3-(trifluoromethyl)phenyl]furan-3-one.

Also known as: Flurtamone, 96525-23-4, Fluortanone, BACCARA.

IUPAC name
5-(methylamino)-2-phenyl-4-[3-(trifluoromethyl)phenyl]furan-3-one
CAS number
1338-02-9
Molecular formula
Variable (Cu salt of naphthenic acids)
Molecular weight
333.3 g/mol
SMILES
CNC1=C(C(=O)C(O1)C2=CC=CC=C2)C3=CC(=CC=C3)C(F)(F)F
PubChem CID
91755

Risk for babies

Moderate risk

Infants are more vulnerable to Copper naphthenate (wood preservative) 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 Copper naphthenate (wood preservative), 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

2 regulatory and scientific bodies have classified Copper naphthenate (wood preservative). The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA—Registered wood preservative pesticide under FIFRA. General use (no restricted use classification)
AWPA—American Wood Protection Association standard P8 — copper naphthenate treatment specifications

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 copper naphthenate (wood preservative)

  • Consumer Wood Treatment — Fence posts and garden stakes, Raised bed garden timber treatment, Deck post cut-end treatment, Log cabin preservation
  • Utility Infrastructure — Utility pole preservation, Railroad tie treatment (supplemental)
  • Marine — Marine timber pilings, Dock/wharf wood preservation

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Copper naphthenate (wood preservative):

  • Alkaline copper quaternary (ACQ)
    Trade-offs: Removes 95-99% of dissolved contaminants including metals, PFAS, nitrates; wastes 2-4 gallons per gallon produced (improving with newer systems); removes beneficial minerals; $0.05-0.25/gallon; requires pre-treatment for longevity.
    Relative cost: 1.2-2×
  • Copper azole (CA)
    Trade-offs: Removes 95-99% of dissolved contaminants including metals, PFAS, nitrates; wastes 2-4 gallons per gallon produced (improving with newer systems); removes beneficial minerals; $0.05-0.25/gallon; requires pre-treatment for longevity.
    Relative cost: 1.2-2×
  • Naturally durable wood (cedar, redwood)
    Trade-offs: Alternative approach; specific tradeoffs depend on application context, scale, and regulatory requirements. Full hazard assessment of alternative recommended before adoption to avoid regrettable substitution.
    Relative cost: 2-5× conventional

Frequently asked questions

Is copper naphthenate (wood preservative) safe for kids?

Infants are more vulnerable to Copper naphthenate (wood preservative) 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 copper naphthenate (wood preservative)?

Copper naphthenate (wood preservative) appears in: Fence posts and garden stakes (Consumer wood treatment); Raised bed garden timber treatment (Consumer wood treatment); Utility pole preservation (Utility infrastructure); Railroad tie treatment (supplemental) (Utility infrastructure); Marine timber pilings (Marine).

What should I do if my child is exposed to copper naphthenate (wood preservative)?

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.

See Copper naphthenate (wood preservative) in the baby app

Look up products containing copper naphthenate (wood preservative), compare to alternatives, and explore the full data record.

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Sources (1)
  1. — expert_curation

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 →