Calcium oxide (quicklime) under K-REACH
CaO · 氧化钙
Status: Registered. Calcium oxide 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 calcium oxide currently (verify against https://www.kita.org/ or Korea Trade Commission filings before invoicing). Korea has substantial domestic lime capacity (Hanil Cement Group, Sungshin Cement, multiple regional limestone-quarry operators; verify current operational status against the producers' public reporting before relying); structurally balanced. KCFTA preferential zero-duty applies for Chinese-origin imports.
K-REACH treats calcium oxide as a routine registered substance with no TCCA overlay. Korea has substantial domestic lime capacity. NO active Korean AD/CVD case. **Calcium oxide distinguishing pattern across all 5 regimes**: limestone calcination at ~900 to 1100 degrees Celsius production route + steel-making and ferrous metallurgy plus construction (cement / mortar) plus FGD plus water plus wastewater treatment plus pulp and paper plus sugar refining downstream chains + sister to calcium hydroxide / hydrated lime (CAS 1305-62-0) lime chain + reacts exothermically with water (slaking reaction) + China VAT export rebate + quicklime CN 2522.10 NOT in CBAM Phase 1 but upstream cement clinker IS.
Listing and threshold
| Substance | Calcium oxide (quicklime) (CAS 1305-78-8), CaO |
|---|---|
| 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 (H315), Eye Dam. 1 (H318), STOT SE 3 (H335)
- Signal word: DANGER. GHS pictograms: GHS05 + GHS07
- KOSHA workplace exposure standard: 2 mg/m3 8-hr TWA (verify against KOSHA OEL database before relying)
- NOT on Korea TCCA Toxic Chemicals list
- NOT on Korean Drug Management Act precursor list
- Korean Customs Service (KCS) HS code: 252210
- IARC: Group 3
Restrictions and conditions of use
- No TCCA Toxic Chemicals Handling Permit required
- KOSHA MSDS in Korean required at workplace plus moisture-control warnings
- NO active Korean AD/CVD case on Chinese calcium oxide currently
- KCFTA preferential zero-duty applies (HS 252210)
Importer obligations
Korean importer of record must hold K-REACH registration. Korea has substantial domestic lime capacity.
Required documents
- K-REACH registration number on Korean side
- Korean MSDS reflecting H315 / H318 / H335 plus moisture-control warnings
- KCS declaration with HS 252210
- 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 substantial domestic lime capacity
- KCFTA preferential zero-duty applies
- NO active Korean AD/CVD case
- NOT on TCCA Toxic Chemicals list
- **Slaking-reaction moisture-control warning critical**
Where to read next
For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for calcium oxide (quicklime), see the CAS 1305-78-8 sourcing reference.
For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the calcium oxide (quicklime) 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
Calcium oxide (quicklime) under REACH
European Union listing status, classifications, importer obligations.
Regulatory
Calcium oxide (quicklime) under TSCA
United States of America listing status, classifications, importer obligations.
Regulatory
Calcium oxide (quicklime) under IECSC
People's Republic of China listing status, classifications, importer obligations.
Regulatory
Calcium oxide (quicklime) under AICIS
Australia listing status, classifications, importer obligations.
CAS
CAS 1305-78-8 sourcing reference
Identifiers, hazard profile, IMDG transport class, and supplier geography for Calcium oxide (quicklime).
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
5 pages across the Sourzi moat
This term shows up in 4 regulatory pages, 1 CAS profiles. Sample backlinks per content type below.
Regulatory (4)
Calcium oxide (quicklime) under REACH
European Union compliance profile for Calcium oxide (quicklime).
Calcium oxide (quicklime) under TSCA
United States of America compliance profile for Calcium oxide (quicklime).
Calcium oxide (quicklime) under IECSC
People's Republic of China compliance profile for Calcium oxide (quicklime).
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.