CAS 7681-52-9 · TSCA · United States of America

Sodium hypochlorite under TSCA

NaClO · 次氯酸钠

Status: Listed. Sodium hypochlorite is on the TSCA Inventory and currently listed as TSCA Active. **Sodium hypochlorite IS a US EPA FIFRA-registered antimicrobial pesticide active ingredient** (verify the current FIFRA registration scope against https://www.epa.gov/pesticide-registration before relying); FIFRA registration requirements apply where placed as antimicrobial product (drinking water disinfection, swimming pool sanitiser, hospital disinfectant, sanitiser). No OSHA PEL specifically listed for sodium hypochlorite at 29 CFR 1910.1000 Table Z-1 (verify against https://www.osha.gov/annotated-pels); chlorine PEL 1 ppm ceiling applies to airborne chlorine release. NOT on EPA RMP threshold list. NOT on DEA scheduling. NOT on California Proposition 65 (verify against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list before relying on negative listing). NO active US AD/CVD case on Chinese-origin sodium hypochlorite currently (verify against https://access.trade.gov/ before invoicing). Section 301 List 3 25% additional duty applies on Chinese-origin sodium hypochlorite (HS 282890) (verify against current USTR Section 301 schedule before invoicing). Major US domestic producers (verify each company-site pair against the producer's public website before relying): Olin Corporation chlor-alkali multi-site, Westlake Chemical Lake Charles Louisiana plus other chlor-alkali sites, Occidental Chemical (OxyChem) multi-site.

US sodium hypochlorite lane: **FIFRA registration where placed as antimicrobial product + Section 301 List 3 + Safe Drinking Water Act for drinking water disinfection**. NOT on Cal Prop 65. NO active US AD/CVD case. Major US producers: Olin, Westlake Chemical, OxyChem.

Listing and threshold

Substance Sodium hypochlorite (CAS 7681-52-9), NaClO
Regime US Toxic Substances Control Act (TSCA), administered by EPA
Jurisdiction United States of America
Status Listed
Tonnage threshold CDR threshold: 25,000 lb manufactured or imported per site per year

Classifications under this regime

  • OSHA HCS: GHS H290 / H314 / H318 / H400 / EUH031
  • No OSHA PEL specifically listed for sodium hypochlorite (verify against https://www.osha.gov/annotated-pels); chlorine PEL 1 ppm ceiling applies to airborne chlorine release
  • NIOSH: Chlorine ceiling 0.5 ppm (verify against https://www.cdc.gov/niosh/npg/)
  • NOT subject to TSCA Section 6 Risk Evaluation
  • NOT on EPA RMP threshold list
  • NOT on DEA List I or List II
  • NOT on California Proposition 65 list (verify against OEHHA before relying on negative listing)
  • DOT 49 CFR 172.101: UN 1791, Class 8, PG II or III
  • **FIFRA-registered antimicrobial active ingredient** (verify the current FIFRA registration scope against https://www.epa.gov/pesticide-registration before relying)
  • IARC: Hypochlorite salts not separately classified

Restrictions and conditions of use

  • OSHA-compliant SDS and workplace HazCom training required
  • NO active US AD/CVD case on Chinese-origin sodium hypochlorite currently
  • Section 301 List 3 25% additional duty applies on Chinese-origin sodium hypochlorite (HS 282890)
  • **FIFRA registration** required where placed as antimicrobial pesticide product (drinking water disinfection, swimming pool, hospital disinfectant, sanitiser)
  • Safe Drinking Water Act applies for drinking water disinfection use

Importer obligations

TSCA self-certification regime; FIFRA registration where placed as antimicrobial. Major US producers: Olin Corporation chlor-alkali multi-site, Westlake Chemical Lake Charles Louisiana plus other chlor-alkali sites, Occidental Chemical (OxyChem) multi-site.

Required documents

  • TSCA Section 13 Import Certification on customs entry
  • OSHA SDS reflecting H290 / H314 / H318 / H400 / EUH031
  • CBP Form 7501 with HS 282890 + Section 301 List 3 25% duty
  • CDR filing every 4 years
  • **FIFRA registration** documentation where placed as antimicrobial product

Common compliance traps

The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.

  • No OSHA PEL specifically listed for sodium hypochlorite; chlorine PEL 1 ppm ceiling applies
  • NO active US AD/CVD case
  • Section 301 List 3 25% additional duty applies
  • **FIFRA registration** required where placed as antimicrobial pesticide product
  • Major US producers: Olin Corporation chlor-alkali multi-site, Westlake Chemical Lake Charles Louisiana, Occidental Chemical (OxyChem) multi-site

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for sodium hypochlorite, see the CAS 7681-52-9 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the sodium hypochlorite cornerstone hub covers the full sourcing chain.

For the structure and history of TSCA, see the TSCA glossary entry.

Need cross-jurisdiction compliance support on this substance? Run it through the REACH / TSCA / IECSC / AICIS / K-REACH checker, or send us the substance and the destination and we will quote FOB China and CIF / DDP landed including the regulatory work on the destination side.

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Free PDF: the same MSDS verification template the Sourzi team uses to cross-reference factory documents against TSCA, REACH, AICIS, and CDR before booking.