CAS 1305-78-8 · IECSC · People's Republic of China

Calcium oxide (quicklime) under IECSC

CaO · 氧化钙

Status: Listed. Calcium oxide is on the IECSC public portion. **NOT typically on China's Catalog of Hazardous Chemicals at industrial-grade purity** (verify against the most recent MEE Catalog of Hazardous Chemicals before relying; lower hazard profile than chlor-alkali products despite slaking-reaction moisture-control concern). NOT on Highly Toxic Chemicals Catalog. NOT on Easily-Made Drugs Catalog. **China VAT export rebate** for calcium oxide (HS 252210) per current inorganic chemicals chapter rebate schedule (verify the rate against the most recent MOF / GACC rebate notice before invoicing). China dominates global lime capacity (verify percent-of-global share against ICIS or USGS Mineral Commodity Summaries before quoting; prior reports cited China at well above 50 percent of global ~430 Mt/yr lime capacity) led by Sinoma multi-site, Anhui Conch Cement Group lime sister capacity, Shandong Chongqi Lime, Hebei Yanshan Lime, multiple regional limestone-quarry operators.

Calcium oxide is comfortably IECSC-listed; typically NOT on Catalog of Hazardous Chemicals at industrial grade. NOT on Highly Toxic, NOT on Easily-Made Drugs. **China VAT export rebate** rate per current schedule (verify before invoicing). **Slaking-reaction moisture-control warning critical**. China dominates global lime capacity. Production: limestone calcination at ~900 to 1100 degrees Celsius.

Listing and threshold

Substance Calcium oxide (quicklime) (CAS 1305-78-8), CaO
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 not typically required

Classifications under this regime

  • NOT typically on Catalog of Hazardous Chemicals at industrial-grade purity (verify against the most recent MEE Catalog before relying)
  • NOT on Highly Toxic Chemicals Catalog
  • NOT on Easily-Made Drugs Catalog
  • GB / GB-T specification framework (verify the current calcium-oxide-specific GB / GB-T standard at https://www.codeofchina.com/ before relying)
  • GB/T 17519-2013 Chinese SDS standard
  • GACC HS code: 252210
  • GB 6944-2012 transport: moisture-control warning required

Restrictions and conditions of use

  • Hazardous Chemicals Operation Permit not typically required (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 plus moisture-control warnings

Importer obligations

For Chinese-origin calcium oxide exported abroad, no IECSC obligation falls on the foreign importer. Major Chinese producers: Sinoma multi-site, Anhui Conch Cement Group lime sister capacity, Shandong Chongqi Lime, Hebei Yanshan Lime, multiple regional limestone-quarry operators.

Required documents

  • GACC export declaration HS 252210
  • GHS Chinese SDS per GB/T 17519 plus moisture-control warnings

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)
  • **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: Sinoma multi-site, Anhui Conch Cement Group lime sister capacity, Shandong Chongqi Lime, Hebei Yanshan Lime
  • Production: limestone calcination at ~900 to 1100 degrees Celsius
  • **Steel-making plus construction (cement / mortar) plus FGD plus water-treatment plus pulp and paper plus sugar refining downstream chains** dominate Chinese consumption
  • **Slaking-reaction moisture-control warning critical** for transport and storage

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 IECSC, see the IECSC glossary entry.

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Read next

Cross-jurisdiction profile and sourcing references

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