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Ammonium octamolybdate

Catalog Number ACM12411642-1
CAS 12411-64-2
Structure Ammonium octamolybdate
Synonyms Molybdate (Mo8O264-), ammonium (1:4); Ammonium molybdate(VI) ((NH4)4Mo8O26) (7CI); Molybdate (Mo8O264-), tetraammonium (9CI); Molybdic acid (H4Mo8O26), tetraammonium salt (8CI); AOM; Ammonium octamolybdenate; Charmax LS-AOM; Climax A 20171; Climax AOM; Climax AOM-A 2017; Climax AOM-A 20171; Climax AOM-WA 011GA; Climax WA 011GA; HC Starck 02F001; HC Starck AOM; Kemgard STA; LS 030; Prime 100; Prime 110; Tetraammonium octamolybdate; Tetraammonium β-octamolybdate; ZT 03AOM
IUPAC Name tetraazanium; bis[[[(oxido(dioxo)molybdenio)oxy-dioxomolybdenio]oxy-dioxomolybdenio]oxy]-dioxomolybdenum; dioxido(dioxo)molybdenum
Molecular Weight 1255.66
Molecular Formula 4(NH₄⁺) • (Mo ₈O₂₆⁴⁻)
Canonical SMILES [NH4+].[NH4+].[NH4+].[NH4+].[O-][Mo](=O)(=O)[O-].[O-][Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)[O-]
InChI InChI=1S/8Mo.4H3N.26O/h;;;;;;;;4*1H3;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;4*-1/p+4
Boiling Point N/A
Melting Point > 360 °C
Purity 99%
Density 3.18 g/cm³
Solubility Solubility in H₂O, 4 g/l (25 °C)
Appearance White powder
Application Ammonium octamolybdate is a molybdenum-based coordination compound used as a modifier for its flame-retardant properties, such as in the patented preparation of flame retardant and wear-resistant foamed asphalt. After modification of ammonium octamolybdate from its cluster geometry to a one-dimensional coordination polymer, ammonium octamolybdate is used as an olefin epoxidation catalyst.
Storage Room temperature

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