Calcium Oxide (CAS 1305-78-8) Sigma-Aldrich

Calcium Oxide molecular structure — Molecular structure

The Sigma-Aldrich catalog lists 9 grades and pack sizes of Calcium Oxide (CAS 1305-78-8). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS	1305-78-8
Molecular formula	CaO
Molecular weight	56.08 g/mol
IUPAC name	oxocalcium
Synonyms	Calcia · Calxyl · Gebrannter kalk · Unslaked lime · Calcium monoxide · Airlock

Safety & Hazards (GHS) Danger

Corrosive

Irritant

H315 Causes skin irritation
H318 Causes serious eye damage
H335 May cause respiratory irritation

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand	Product / grade	Code
Sigma	CALCIUM OXIDE, 99.995%	229539-5G	Request Quote
Sigma	CALCIUM OXIDE, ANHYDROUS, POWDER, >=99.	451711-5G	Request Quote
Sigma	CALCIUM OXIDE, NANOPOWDER, <160NM (BET)	634182-100G 634182-25G	Request Quote
Sigma	CALCIUM OXIDE, REAGENT GRADE	248568-2.5KG 248568-500G	Request Quote
Sigma	CALCIUM OXIDE, REAGENTPLUS, 99.9% METALS	208159-100G 208159-25G 208159-500G	Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.