Baby Safety / Compounds / Sulfur mustard (mustard gas)

Is Sulfur mustard (mustard gas) 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 Sulfur mustard (mustard gas), 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 sulfur mustard (mustard gas)?

The IUPAC name is 1-chloro-2-(2-chloroethylsulfanyl)ethane.

Also known as: 1-chloro-2-(2-chloroethylsulfanyl)ethane, Mustard gas, Sulfur mustard, Yperite.

IUPAC name
1-chloro-2-(2-chloroethylsulfanyl)ethane
CAS number
505-60-2
Molecular formula
C4H8Cl2S
Molecular weight
159.08 g/mol
SMILES
C(CCl)SCCCl
PubChem CID
10461

Risk for babies

Context-dependent

Pregnancy alters the metabolism and distribution of Sulfur mustard (mustard gas), 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 Sulfur mustard (mustard gas), 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

9 regulatory and scientific bodies have classified Sulfur mustard (mustard gas). The classifications differ — that's the data.

AgencyYearClassificationNotes
IARC1987Group 1 (carcinogenic to humans)IARC Supplement 7 (1987), originally Monograph 9 (1975). Sufficient evidence in humans (lung cancer, pharyngeal/laryngeal cancer, esophageal cancer in WWI and WWII veterans with mustard gas exposure) and animals. A bifunctional alkylating agent forming DNA intrastrand and interstrand cross-links; also a potent vesicant causing severe tissue injury independent of carcinogenicity.
US EPA2000known to be carcinogenic to humansClassified as a chemical warfare agent; production and stockpiling prohibited under the Chemical Weapons Convention (CWC, 1993). EPA regulates cleanup of former mustard gas manufacturing sites and munitions disposal facilities. Residual soil contamination at former WWII production/testing sites in the US represents the primary current environmental concern.
EPA CTX / NTP RoC—Known Human Carcinogen
EPA CTX / IARC—Group 1 - Carcinogenic to humans
EPA CTX / CalEPA—Known human carcinogen
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 10 positive / 0 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 10 positive / 0 negative reports)
EPA CTX / Skin-Eye—Eye Irritation: Category 1 (score: very high)
EPA CTX / Skin-Eye—Skin Irritation: Category 1 (score: very 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 sulfur mustard (mustard gas)

  • Outdoor Air — Vehicle exhaust, Industrial emissions, Power plant discharge
  • Indoor Air — Combustion byproducts, Office buildings, Parking garages

Safer alternatives

Lower-risk approaches that achieve a similar outcome to Sulfur mustard (mustard gas):

  • 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 sulfur mustard (mustard gas)?

Sulfur mustard (mustard gas) appears in: Vehicle exhaust (Outdoor air); Industrial emissions (Outdoor air); Combustion byproducts (Indoor air); Office buildings (Indoor air).

Why do regulators disagree about sulfur mustard (mustard gas)?

Sulfur mustard (mustard gas) has been classified by 9 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 Sulfur mustard (mustard gas) in the baby app

Look up products containing sulfur mustard (mustard gas), compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (3)
  1. IARC Monographs Volume 9: Sulfur Mustard (updated Supplement 7, 1987) (1987) — regulatory
  2. US EPA: Chemical Warfare Agents at Former Defense Sites — Remediation Guidance (2009) — regulatory
  3. ATSDR Medical Management Guidelines for Sulfur Mustard (2014) — report

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 →