CAS 1305-78-8

Calcium oxide

氧化钙

CaOMW 56.077 g/molHS 282510 UN1910 · Class

From the buying desk

Not classified as DG for sea transport (UN 1910 is for some specific applications). Reacts violently with water releasing heat. Ships in 25 to 50 kg bags, 1 t big bags, or bulk vessel. China is one of the largest producers; Yunnan, Hunan, Hebei have major capacity.

Import Card

Before you order calcium oxide from China, see its register listing, the duty, anti dumping cases and a supplier check on one card, each with its source and date.

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Identifiers

Synonyms
Quicklime, Burnt lime, CaO
Formula
CaO
Molecular weight
56.077 g/mol
SMILES
O=[Ca]
InChIKey
ODINCKMPIJJUCX-UHFFFAOYSA-N
HS code (6-digit)
282510

Transport and hazard profile

Transport classification, UN number UN1910, IMDG Class .

GHS hazard statements, Danger. H-codes, H315, H318, H335. Refer to the substance SDS Section 2 for the full classification.

US and Australian rules for Calcium oxide

Read from the official lists by CAS 1305-78-8. Screening only: check the source before you ship, store or report.

California Prop 65

No entry

No entry for CAS 1305-78-8 in the OEHHA list dated July 31, 2026.

Open the tool · Official source

OSHA exposure limit

Listed

Table Z-1: 5 mg/m³ as an 8 hour average.

Open the tool · Official source

Australian exposure standard

Listed

2 mg/m³ as an 8 hour average.

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CERCLA reportable quantity

No entry

No entry for CAS 1305-78-8 in 40 CFR 302.4 as read on September 24, 2026.

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EPCRA Tier II threshold

No entry

Not on the Extremely Hazardous Substances list, so the general 10,000 lb Tier II threshold applies where an SDS is required.

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Regulatory profile across 5 jurisdictions

Verified against ECHA, US EPA TSCA Inventory, MEE China IECSC, NIER K-REACH, and AICIS AIIC. Last verification 2026-04-30. Confirm with the regulator portal before any shipping decision.

EU REACH
Listed
US TSCA
Listed
China IECSC
Listed
Korea K-REACH
Listed
Australia AICIS
Listed

Look up other substances at the REACH / TSCA cross-jurisdiction checker.

Common applications

  • · Steel production (slag former)
  • · Construction (mortar, cement)
  • · Sugar refining
  • · Wastewater treatment
  • · Soil stabilisation

Typical Chinese supplier geography

Major Chinese capacity sits in Yunnan, Hunan, Hebei. Coastal producers (Shandong, Jiangsu, Zhejiang) typically dominate export volume because of port access; inland producers (Inner Mongolia, Xinjiang, Shaanxi) compete on raw-material cost but add inland-rail or trucking cost to reach the coast.

Sourcing documentation chain

Every shipment of Calcium oxide from China should include a per-batch COA, a current SDS per GB/T 17519 on the China side and the destination jurisdiction's standard on the import side, a packing list, a bill of lading, and a certificate of origin plus an MSA China DG packing certificate. For Incoterms reference see FOB, CIF, and CFR.

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Read next

Where this substance shows up across Sourzi

Referenced in

11 pages across the Sourzi moat

This term shows up in 5 regulatory pages, 6 chemical parks. Sample backlinks per content type below.

Regulatory (5)

Plus 2 more regulatory pages.

Park (6)

Plus 3 more chemical parks.

Free download

Free PDF: the MSDS verification template Sourzi runs against the supplier sheet for every CAS number we book out of China.