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Description

Calcium hypophosphite · CAS 7789-79-9 · CaO4P2. UNII NS00074460. Boiling Point: >350 °C; Melting Point: Decomposes at 300 °C; Solubility: In water, 154 g/L at 25 °C.

Identification

CAS Registry Number	7789-79-9
PubChem CID	24618
Molecular formula	CaO4P2
UNII (FDA)	NS00074460

Computed Descriptors

Molecular Weight	166.02
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	0
Exact Mass	165.8897733
Monoisotopic Mass	165.8897733
Topological Polar Surface Area	80.3
Heavy Atom Count	7
Formal Charge	0
Complexity	7.5

Physical & Chemical Properties

Boiling Point	>350 °C
Melting Point	Decomposes at 300 °C
Solubility	In water, 154 g/L at 25 °C
Density	2.243 at 20 °C

Physical description & handling notes

• White solid; Soluble in water; [Hawley] Grey powder; Soluble in water; [MSDSonline]
• Monoclinic, prismatic crystals or granular powder
• White monoclinic crystals
• Monoclinic crystals from aqueous Me2CO
• White powder
• MP: Decomposes at 300 °C and evolves spontaneously inflammable phosphine

Regulatory Status

Regulatory & Food Contact	FDA Substance added to food: ANTIOXIDANT
GHS notification summary	0.5% (1 / 188)

GHS Hazard Classification

GHS notification summary	0.5% (1 / 188)
Reported hazard statements	H228 (99.5%), H302 (73.9%), H319 (60.1%)

Documented Uses

• Used as a corrosion inhibitor, pharmaceutical antioxidant, and veterinary dietary supplement; Also used in nickel plating; [Merck Index]
• Electroplating [Category: Plate]
• Farming (Feed Additives) [Category: Industry]
• This is a DEA List 1 chemical substance.
• List I chemical means a chemical specifically designated by the Administrator in section 1310.02(a) of this chapter that, in addition to legitimate uses, is used in manufacturing a controlled substance in violation of the Act and is important to the manufacture of a controlled substance.
• As corrosion inhibitor; in nickel plating. Pharmaceutic aid (retards oxidation of ferrous salts).

Synonyms

7789-79-9; DTXSID1052531; RefChem:200049; DTXCID8031104; CALCIUM PHOSPHINATE; Calciumphosphinat; SCHEMBL146220; LITFOGPYONJRNO-UHFFFAOYSA-L; AKOS025243251; DB-023011; NS00074460; 232-190-8

Frequently Asked Questions

What are the CAS number and molecular formula of Calcium hypophosphite?

CAS 7789-79-9; molecular formula CaO4P2; molecular weight — g/mol.

What other names is Calcium hypophosphite known by?

7789-79-9, DTXSID1052531, RefChem:200049, DTXCID8031104, CALCIUM PHOSPHINATE, Calciumphosphinat.

What is the regulatory status of Calcium hypophosphite?

Documented regulatory listings: FDA Substance added to food: ANTIOXIDANT.

Is Calcium hypophosphite classified as hazardous?

0.5% of GHS notifications report no hazard classification (1 of 188).

What are the key physical properties of Calcium hypophosphite?

Boiling Point: >350 °C; Melting Point: Decomposes at 300 °C; Solubility: In water, 154 g/L at 25 °C; Density: 2.243 at 20 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.