四水钼酸铵

Description

Ammonium molybdate tetrahydrate · CAS 12054-85-2 · H32Mo7N6O28-42. UNII OGI154X474. Melting Point: 90 °C; Density: 2.27 @25 °C; Density: 2.498 @25 °C.

Identification

CAS Registry Number	12054-85-2
PubChem CID	485454
Molecular formula	H32Mo7N6O28-42
IUPAC name	hexaazanium;molybdenum;(oxygen(2-));tetrahydrate
UNII (FDA)	OGI154X474

Computed Descriptors

Molecular Weight	1235.9
Hydrogen Bond Donor Count	10
Hydrogen Bond Acceptor Count	28
Rotatable Bond Count	0
Exact Mass	1239.468066
Monoisotopic Mass	1249.46428
Topological Polar Surface Area	34
Heavy Atom Count	41
Formal Charge	-42
Complexity	0

Physical & Chemical Properties

Melting Point	90 °C
Density	2.27 @25 °C
Density	2.498 @25 °C

Physical description & handling notes

• Ammonium molybdate is a white to greenish-yellow solid. Sinks and mixes with water. (USCG, 1999)
• Liquid; Dry Powder; Large Crystals
• White lumps or powder; Partially soluble in water; [MSDSonline]
• 1.4 at 68 °F 2.398 (USCG, 1999) - Denser than water; will sink

Regulatory Status

GHS notification summary	90.4% (281 / 311)

GHS Hazard Classification

GHS notification summary	90.4% (281 / 311)
Reported hazard statements	H302, H319, H335, H351, H361, H373

Documented Uses

• A metallic negative stain that is used to negative stain the Formvar backing on coated electron microscopic grids for transmission electron microscopy. [Hayes, p. 2075]
• Information on 2 consumer products that contain Ammonium molybdate in the following categories is provided:
• 2023: 2,500,000 - <4,000,000 lb
• 2022: 4,000,000 - <5,500,000 lb
• 2021: 4,000,000 - <5,500,000 lb
• 2020: 2,500,000 - <4,000,000 lb

Synonyms

Hexaammonium molybdate tetrahydrate; OGI154X474; RefChem:915719; DTXSID5036896; MOLYBDENUM (AS AMMONIUM MOLYBDATE); Molybdate (Mo7O246-), hexaammonium, tetrahydrate; 234-320-9; 234-722-4; 603-021-9; 12501-45-0; 21Y68J178E; Ammonium Molybdate; Ammonium molybdate anhydrous; Ammonium molybdate(VI) tetrahydrate; Ammonium paramolybdate; CHEBI:91249

Frequently Asked Questions

What are the CAS number and molecular formula of Ammonium molybdate tetrahydrate?

CAS 12054-85-2; molecular formula H32Mo7N6O28-42; molecular weight — g/mol.

What other names is Ammonium molybdate tetrahydrate known by?

Hexaammonium molybdate tetrahydrate, OGI154X474, RefChem:915719, DTXSID5036896, MOLYBDENUM (AS AMMONIUM MOLYBDATE), Molybdate (Mo7O246-), hexaammonium, tetrahydrate.

Is Ammonium molybdate tetrahydrate classified as hazardous?

90.4% of GHS notifications report no hazard classification (281 of 311).

What are the key physical properties of Ammonium molybdate tetrahydrate?

Melting Point: 90 °C; Density: 2.27 @25 °C; Density: 2.498 @25 °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.