Baby Safety / Compounds / Benzo[k]fluoranthene (BkF)

Is Benzo[k]fluoranthene (BkF) safe for babies and kids?

Elevated risk for kids

Infants are more vulnerable to Benzo[k]fluoranthene (BkF) 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 benzo[k]fluoranthene (bkf)?

The IUPAC name is benzo[k]fluoranthene.

Also known as: benzo[k]fluoranthene, BENZO(K)FLUORANTHENE, 8,9-Benzofluoranthene, 11,12-Benzofluoranthene.

IUPAC name
benzo[k]fluoranthene
CAS number
207-08-9
Molecular formula
C20H12
Molecular weight
252.3 g/mol
SMILES
C1=CC=C2C=C3C4=CC=CC5=C4C(=CC=C5)C3=CC2=C1
PubChem CID
9158

Risk for babies

Elevated risk

Infants are more vulnerable to Benzo[k]fluoranthene (BkF) 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 Benzo[k]fluoranthene (BkF), 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

6 regulatory and scientific bodies have classified Benzo[k]fluoranthene (BkF). The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA CTX / IRIS—B2 (Probable human carcinogen - based on sufficient evidence of carcinogenicity in animals)
EPA CTX / NTP RoC—Reasonably Anticipated to be a Human Carcinogen
EPA CTX / IARC—Group 2B - Possibly carcinogenic to humans
EPA CTX / CalEPA—Known human carcinogen
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 2 positive / 0 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 2 positive / 0 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 benzo[k]fluoranthene (bkf)

  • 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 Benzo[k]fluoranthene (BkF):

  • Exposure reduction (combustion byproduct)
    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×

Frequently asked questions

Is benzo[k]fluoranthene (bkf) safe for kids?

Infants are more vulnerable to Benzo[k]fluoranthene (BkF) 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 benzo[k]fluoranthene (bkf)?

Benzo[k]fluoranthene (BkF) 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 benzo[k]fluoranthene (bkf)?

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 benzo[k]fluoranthene (bkf)?

Benzo[k]fluoranthene (BkF) has been classified by 6 agencies including EPA CTX / IRIS, EPA CTX / NTP RoC, EPA CTX / IARC, EPA CTX / CalEPA, 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 Benzo[k]fluoranthene (BkF) in the baby app

Look up products containing benzo[k]fluoranthene (bkf), compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. IARC Monographs Volume 92: Some Non-heterocyclic Polycyclic Aromatic Hydrocarbons and Some Related Exposures — Chrysene Group 2B, Benzo[b]fluoranthene Group 2B, Benzo[k]fluoranthene Group 2B, Dibenzo[a,h]anthracene Group 2A (2010) (2010) — regulatory
  2. US EPA: 16 Priority Polycyclic Aromatic Hydrocarbons — Carcinogenic Potency Factors (TEFs), Environmental Monitoring Priority List, Superfund Guidance (SW-846 Method 8270, IRIS Assessments) (1993) — 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 →