Sodium silicate (waterglass) under K-REACH
Na2O.nSiO2 (n typically 2.0 to 3.3) · 硅酸钠
Status: Registered. Sodium silicate is registered under K-REACH. NOT on Korea TCCA Toxic Chemicals list (verify against the current TCCA Toxic Chemicals list at https://www.nics.go.kr/ before relying). NOT on Korean Drug Management Act precursor list. NO active Korean AD/CVD case on Chinese-origin sodium silicate currently (verify against https://www.kita.org/ or Korea Trade Commission filings before invoicing). Korea has domestic sodium silicate production capacity; balanced producer-importer for detergent + pulp / paper + water treatment + foundry sectors. KCFTA preferential zero-duty applies for Chinese-origin imports.
K-REACH treats sodium silicate as a routine registered substance with no TCCA overlay. Korea has domestic production capacity; balanced producer-importer. NO active Korean AD/CVD case. **Sodium silicate distinguishing pattern across all 5 regimes**: Production via furnace fusion of soda ash (Na2CO3 batch 36) plus silica sand at ~1400 C producing solid cullet, then hydrothermal dissolution in pressurised hot water yielding liquid waterglass at variable Na2O:SiO2 ratios (mass ratio "n" typically 2.0 to 3.3 for commercial grades) + completes Na2CO3 batch 36 downstream chain alongside sodium bicarbonate batch 68 + detergent silicate plus pulp / paper sizing plus silica-gel and zeolite feedstock plus water treatment plus oil-drilling fluid plus foundry sand binder plus soil stabilization plus fire-retardant downstream chains + moderate hazard profile (Skin Irrit. 2 + Eye Dam. 1 at concentrated alkaline grade) + concentrated liquid waterglass Class 8 PG III at high alkalinity + China VAT export rebate.
Listing and threshold
| Substance | Sodium silicate (waterglass) (CAS 1344-09-8), Na2O.nSiO2 (n typically 2.0 to 3.3) |
|---|---|
| Regime | Korea Act on the Registration and Evaluation of Chemicals (Act No. 11789, "K-REACH" amended 2018) |
| Jurisdiction | Republic of Korea |
| Status | Registered |
| Tonnage threshold | K-REACH registration required for existing chemicals manufactured or imported >1 tonne/year (verified per Korean Ministry of Environment / NIER guidance, https://chemical.chemlinked.com/chempedia/k-reach; threshold for new substances was reduced from 0.1 t/y to 1 t/y effective 1 January 2025 per K-REACH 2025 amendment) |
Classifications under this regime
- Korean GHS classification: Skin Irrit. 2 + Eye Dam. 1 at concentrated alkaline grade
- NOT on Korea TCCA Toxic Chemicals list
- NOT on Korean Drug Management Act precursor list
- Korean Customs Service (KCS) HS code: 283919
- IARC: Not classified
Restrictions and conditions of use
- No TCCA Toxic Chemicals Handling Permit required
- KOSHA MSDS in Korean required at workplace (with skin / eye corrosion handling at concentrated grade)
- NO active Korean AD/CVD case on Chinese sodium silicate currently
- KCFTA preferential zero-duty applies (HS 283919)
Importer obligations
Korean importer of record must hold K-REACH registration. Korea has domestic sodium silicate production capacity; balanced producer-importer.
Required documents
- K-REACH registration number on Korean side
- Korean MSDS (with skin / eye corrosion handling at concentrated grade)
- KCS declaration with HS 283919
- China-Korea FTA Form CO
Common compliance traps
The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.
- Korea has domestic sodium silicate production capacity; balanced producer-importer
- KCFTA preferential zero-duty applies
- NO active Korean AD/CVD case
- NOT on TCCA Toxic Chemicals list
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 K-REACH, see the K-REACH 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
Regulatory
Sodium silicate (waterglass) under REACH
European Union listing status, classifications, importer obligations.
Regulatory
Sodium silicate (waterglass) under TSCA
United States of America listing status, classifications, importer obligations.
Regulatory
Sodium silicate (waterglass) under IECSC
People's Republic of China listing status, classifications, importer obligations.
Regulatory
Sodium silicate (waterglass) under AICIS
Australia listing status, classifications, importer obligations.
Glossary
K-REACH, K-REACH
South Korean Act on the Registration and Evaluation of Chemicals, the Korean equivalent of EU REACH. Requires registration of substances manufactured in or imported into Korea above 1 tonne per year. Administered by the Ministry of Environment through NIER. Includes phase-in registration tiers, joint submission requirements, and a designated 'Only Representative' mechanism for non-Korean manufacturers.
Referenced in
4 pages across the Sourzi moat
This term shows up in 4 regulatory pages. Sample backlinks per content type below.
Regulatory (4)
Sodium silicate (waterglass) under REACH
European Union compliance profile for Sodium silicate (waterglass).
Sodium silicate (waterglass) under TSCA
United States of America compliance profile for Sodium silicate (waterglass).
Sodium silicate (waterglass) under IECSC
People's Republic of China compliance profile for Sodium silicate (waterglass).
Plus 1 more regulatory pages.
Free download
Free PDF: the same MSDS verification template the Sourzi team uses to cross-reference factory documents against TSCA, REACH, AICIS, and CDR before booking.