Ammonium Hypophosphite

Description

Ammonium Hypophosphite · CAS 7803-65-8 · H4NO2P. UNII 15A8J678A2. Boiling Point: Decomposes at 240 °C; Melting Point: 392 °F (USCG, 1999); Melting Point: 200 °C.

Identification

CAS Registry Number	7803-65-8
PubChem CID	24656
Molecular formula	H4NO2P
UNII (FDA)	15A8J678A2

Computed Descriptors

Molecular Weight	81.011
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	80.99796537
Monoisotopic Mass	80.99796537
Topological Polar Surface Area	41.1
Heavy Atom Count	4
Formal Charge	0
Complexity	7.5

Physical & Chemical Properties

Boiling Point	Decomposes at 240 °C
Melting Point	392 °F (USCG, 1999)
Melting Point	200 °C
Density	1.634 at 20 °C

Physical description & handling notes

• Ammonium hypophosphite is a white crystalline solid. Sinks and mixes with water. (USCG, 1999)
• White deliquescent solid; [Hawley] White crystalline solid; [MSDSonline]
• White granules or rhombic crystals
• Crystals or white granules
• Deliquescent crystals or white powder
• Decomposes 464 °F (USCG, 1999)

GHS Hazard Classification

Reported hazard statements	H315 (100%), H319 (100%), H335 (72%)

Documented Uses

• Used as a catalyst in the production of polyamides; [Merck Index]
• 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 catalyst in polyamide manufacture.
• To prevent the crystals or solution from turning yellow due to formation of free iodine, up to 1% of ammonium hypophosphite is added as a stabilizer /to ammonium iodide preparations/.
• Phosphinic acid, ammonium salt (1:1): ACTIVE

Synonyms

DTXSID20884440; RefChem:202613; DTXCID701023880; 7803-65-8; Phosphinic acid, ammonium salt (1:1); AMMONIUM HYPOPHOSPHITE [MI]; AMMONIUM HYPOPHOSPHITE [HSDB]; AKOS015904424; AMMONIUM HYPOPHOSPHITE ((NH4)H2PO2); NS00082735; PHOSPHINIC ACID AMMONIUM SALT (1:1)

Frequently Asked Questions

What are the CAS number and molecular formula of Ammonium Hypophosphite?

CAS 7803-65-8; molecular formula H4NO2P; molecular weight — g/mol.

What other names is Ammonium Hypophosphite known by?

DTXSID20884440, RefChem:202613, DTXCID701023880, 7803-65-8, Phosphinic acid, ammonium salt (1:1), AMMONIUM HYPOPHOSPHITE [MI].

Is Ammonium Hypophosphite classified as hazardous?

Hazard statements reported: H315, H319, H335.

What are the key physical properties of Ammonium Hypophosphite?

Boiling Point: Decomposes at 240 °C; Melting Point: 392 °F (USCG, 1999); Melting Point: 200 °C; Density: 1.634 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.