CAS 7757-82-6 · TSCA · United States of America

Sodium sulfate (Glauber's salt) under TSCA

Na2SO4 · 硫酸钠

Status: Listed. Sodium sulfate is on the TSCA Inventory and currently listed as TSCA Active. **No OSHA PEL specifically listed for sodium sulfate at 29 CFR 1910.1000 Table Z-1 (verify against https://www.osha.gov/annotated-pels); the OSHA Particulates Not Otherwise Regulated (PNOR) framework provides 15 mg/m3 total dust + 5 mg/m3 respirable as default for nuisance dust (verify against osha.gov before relying).** 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 sulfate currently (verify against https://access.trade.gov/ before invoicing). Section 301 List 3 25% additional duty applies on Chinese-origin sodium sulfate (HS 283311 / 283319) (verify against current USTR Section 301 schedule before invoicing). USP / NF monograph applies for pharma-grade sodium sulfate. Major US domestic producers (verify each company-site pair against the producer's public website before relying): Searles Valley Minerals Trona California natural sodium sulfate operations from Searles Lake, Cooper Natural Resources Brownfield Texas natural sodium sulfate operations from West Texas brine.

US sodium sulfate lane: **No OSHA PEL specifically listed (PNOR framework default) + Section 301 List 3 + USP / NF for pharma-grade**. NOT on Cal Prop 65. NO active US AD/CVD case. Major US producers: Searles Valley Minerals (California Searles Lake natural), Cooper Natural Resources (Texas West Texas brine natural).