CAS 1344-09-8 · IECSC · People's Republic of China

Sodium silicate (waterglass) under IECSC

Na2O.nSiO2 (n typically 2.0 to 3.3) · 硅酸钠

Status: Listed. Sodium silicate is on the IECSC public portion. **NOT on China's Catalog of Hazardous Chemicals at solid industrial-grade purity** (verify against the most recent MEE Catalog of Hazardous Chemicals before relying; concentrated liquid waterglass at high alkalinity may carry GB 6944 Class 8 transport status). NOT on Highly Toxic Chemicals Catalog. NOT on Easily-Made Drugs Catalog. **China VAT export rebate** for sodium silicate (HS 283919) per current inorganic chemicals chapter rebate schedule (verify the rate against the most recent MOF / GACC rebate notice before invoicing). **China dominates global sodium silicate capacity (verify percent-of-global share against ICIS or S&P Commodity Insights before quoting)**. Major Chinese producers: PQ Corporation (Ecovyst) China operations, Shandong Xintai Water Treatment, Shandong Sanjiang Industry, Zhejiang Sanmei Chemical, Chongqing Sanfeng Silicate, Jiangsu Hailan New Materials (verify each producer-site pair against the producer's public website before relying on a specific plant).

Sodium silicate is comfortably IECSC-listed; typically NOT on Catalog of Hazardous Chemicals at solid industrial grade. Concentrated liquid waterglass at high alkalinity may carry Hazardous Chemicals Operation Permit obligations. NOT on Highly Toxic, NOT on Easily-Made Drugs. **China VAT export rebate** rate per current schedule (verify before invoicing). China dominates global sodium silicate capacity. Production: furnace fusion soda ash + silica sand at 1400 C, then hydrothermal dissolution at n=2.0-3.3.

Listing and threshold

Substance Sodium silicate (waterglass) (CAS 1344-09-8), Na2O.nSiO2 (n typically 2.0 to 3.3)
Regime China Inventory of Existing Chemical Substances (IECSC), administered by the Ministry of Ecology and Environment (MEE)
Jurisdiction People's Republic of China
Status Listed
Tonnage threshold No new-substance threshold. Hazardous Chemicals Operation Permit may apply at concentrated liquid grade (verify against the most recent MEE Catalog before relying)

Classifications under this regime

  • NOT typically on Catalog of Hazardous Chemicals at solid industrial-grade purity (verify against the most recent MEE Catalog before relying)
  • Concentrated liquid waterglass at high alkalinity may carry Class 8 transport classification (verify against GB 6944-2012 before relying)
  • NOT on Highly Toxic Chemicals Catalog
  • NOT on Easily-Made Drugs Catalog
  • GB/T 4209-2008 industrial sodium silicate specification (verify the current sodium-silicate-specific GB / GB-T standard at https://www.codeofchina.com/ before relying)
  • GB/T 17519-2013 Chinese SDS standard
  • GACC HS code: 283919
  • **Pharma-grade compliance with Chinese Pharmacopoeia (ChP)** where placed as colloidal-silica derivative (verify monograph reference against the most recent ChP edition before relying)

Restrictions and conditions of use

  • Hazardous Chemicals Operation Permit may apply at concentrated liquid grade (verify against the most recent MEE Catalog before relying)
  • **China VAT export rebate** rate per current inorganic chemicals chapter schedule (verify against the most recent MOF / GACC rebate notice before invoicing)
  • GB/T 17519 Chinese SDS required (with skin / eye corrosion handling notes at concentrated grade)

Importer obligations

For Chinese-origin sodium silicate exported abroad, no IECSC obligation falls on the foreign importer. Major Chinese producers: PQ Corporation (Ecovyst) China operations, Shandong Xintai Water Treatment, Shandong Sanjiang Industry, Zhejiang Sanmei Chemical, Chongqing Sanfeng Silicate, Jiangsu Hailan New Materials.

Required documents

  • GACC export declaration HS 283919
  • GHS Chinese SDS per GB/T 17519 (with skin / eye corrosion handling at concentrated grade)
  • Pharma-grade ChP certification where applicable for colloidal-silica derivative
  • Hazardous Chemicals Operation Permit where concentrated liquid grade requires it

Common compliance traps

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

  • Catalog of Hazardous Chemicals status (verify against the most recent MEE Catalog before relying); concentrated liquid grade may require Hazardous Chemicals Operation Permit
  • **China VAT export rebate** rate (verify against the most recent MOF / GACC rebate notice before invoicing)
  • NOT on Highly Toxic, NOT on Easily-Made Drugs
  • Major Chinese producers: PQ Corporation (Ecovyst) China, Shandong Xintai, Shandong Sanjiang, Zhejiang Sanmei, Chongqing Sanfeng, Jiangsu Hailan (verify each producer-site pair)
  • Production: furnace fusion of soda ash + silica sand at ~1400 C, then hydrothermal dissolution to liquid waterglass at variable Na2O:SiO2 ratios n=2.0-3.3
  • **Detergent silicate + pulp / paper sizing + silica-gel and zeolite feedstock + water treatment + oil-drilling fluid + foundry sand binder + soil stabilization + fire-retardant downstream chains** dominate Chinese consumption

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 silicate (waterglass), see the CAS 1344-09-8 sourcing reference.

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

For the structure and history of IECSC, see the IECSC 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.

Read next

Cross-jurisdiction profile and sourcing references

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