Baby Safety / Compounds / Strontium-90 (⁹⁰Sr)

Is Strontium-90 (⁹⁰Sr) safe for babies and kids?

Very high risk for kids

Infants are more vulnerable to Strontium-90 (⁹⁰Sr) 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 strontium-90 (⁹⁰sr)?

The IUPAC name is strontium-90.

Also known as: strontium-90, 90Sr radioisotope, Strontium Sr-90, STRONTIUM 90.

IUPAC name
strontium-90
CAS number
10098-97-2
Molecular formula
Sr
Molecular weight
89.90773 g/mol
SMILES
[Sr]
PubChem CID
5486204

Risk for babies

Very high risk

Infants are more vulnerable to Strontium-90 (⁹⁰Sr) 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

Severe risk

Pregnancy alters the metabolism and distribution of Strontium-90 (⁹⁰Sr), potentially increasing fetal exposure. The developing embryo/fetus is vulnerable during organogenesis (weeks 3-8) and neurological development. Placental transfer should be assumed.

Known reproductive toxicant (GHS H360) or confirmed endocrine disruptor. Placental transfer is presumed. Fetal exposure during critical developmental windows may cause structural malformations, growth restriction, or functional deficits.

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

Regulatory consensus

1 regulatory bodyhas classified Strontium-90 (⁹⁰Sr).

AgencyYearClassificationNotes
IARC—Group 1

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 strontium-90 (⁹⁰sr)

  • 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 Strontium-90 (⁹⁰Sr):

  • Shielding / distance / time (radiation protection)
    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 strontium-90 (⁹⁰sr) safe for kids?

Infants are more vulnerable to Strontium-90 (⁹⁰Sr) 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 strontium-90 (⁹⁰sr)?

Strontium-90 (⁹⁰Sr) 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 strontium-90 (⁹⁰sr)?

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 Strontium-90 (⁹⁰Sr) in the baby app

Look up products containing strontium-90 (⁹⁰sr), compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. US NRC: Strontium-90 Fact Sheet — 28.8-Year Physical Half-Life, Beta Emitter, Bone-Seeking Behavior (Calcium Analog), Leukemia and Osteosarcoma Risk, Baby Tooth Survey 1959-1961, and Partial Test Ban Treaty Context (2020) (2020) — regulatory
  2. CDC: Radiation Emergencies — Strontium-90 Radiological Fact Sheet, Dietary Exposure Routes, Bone Incorporation Mechanism, Calcium Competitive Inhibition, Post-Chernobyl and Post-Fukushima Food Monitoring Programs (2018) (2018) — 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 →