Calcium Sulfite

Catalog	ACM10257553
CAS	10257-55-3
Structure
Category	Flocculant
Description	Calcium sulfite, or calcium sulphite, is a chemical compound, the calcium salt of sulfurous acid with the formula CaSO3. In presence of moisture it commonly forms the hemihydrate CaSO3.0.5H₂O. Its uses as the pure compound are limited, such as a food additive, but it is produced in large quantities during flue gas desulfurization (FGD) with lime, which then exposed to air converts to common calcium sulfate (CaSO4, more exactly the gypsum form, CaSO4.2H₂O) by oxygen scavenging, this route of CaSO4 production via CaSO3 intermediate being the main source of drywall wallboard.
Synonyms	Calcium Sulfite;
IUPAC Name	calcium; sulfite
Molecular Weight	120.14
Molecular Formula	CaO3S
Canonical SMILES	[O-]S(=O)[O-].[Ca+2]
InChI	InChI=1S/Ca.H₂O3S/c;1-4(2)3/h;(H2,1,2,3)/q+2;/p-2
InChI Key	GBAOBIBJACZTNA-UHFFFAOYSA-L
EC Number	243-873-5
HS Code	2832200000
LogP	-0.20270
PSA	91.63

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