CAS 144-55-8 · TSCA · United States of America

Sodium bicarbonate (baking soda) under TSCA

NaHCO3 · 碳酸氢钠

Status: Listed. Sodium bicarbonate is on the TSCA Inventory and currently listed as TSCA Active. **No substance-specific OSHA PEL** for sodium bicarbonate at 29 CFR 1910.1000 Table Z-1; covered as Particulates Not Otherwise Regulated (PNOR) at 5 mg/m3 respirable fraction and 15 mg/m3 total dust 8-hr TWA (verify against https://www.osha.gov/annotated-pels/table-z-1). 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 bicarbonate currently (verify against https://access.trade.gov/ before invoicing). **However, US has active AD case on Chinese-origin soda ash (CAS 497-19-8) historic context; verify scope and current status against access.trade.gov before relying on soda-ash-chain duty status.** Section 301 List 3 25% additional duty applies on Chinese-origin sodium bicarbonate (HS 283630) (verify against current USTR Section 301 schedule before invoicing). **Food-grade GRAS** under 21 CFR 184.1736 (verify against https://www.ecfr.gov/ before relying); USP / NF monograph applies for pharma-grade. Major US domestic producers (verify each company-site pair against the producer's public website before relying): Solvay (now Genesis Energy) Green River Wyoming natural trona operations, Tata Chemicals (Soda Ash Partners) Green River Wyoming natural trona operations, Genesis Alkali (formerly Tronox / Tata) Green River Wyoming natural trona operations.

US sodium bicarbonate lane: **PNOR-only OSHA coverage (5 / 15 mg/m3) + Section 301 List 3 + soda-ash AD context + GRAS / USP / NF for food-grade and pharma-grade**. NOT on Cal Prop 65. NO active US AD/CVD case on bicarbonate itself. Major US producers (natural trona): Genesis Energy, Tata Chemicals, Genesis Alkali at Green River Wyoming.