Ammonium orthomolybdate

Ammonium orthomolybdate
Names
	Other names Diammonium molybdate
Identifiers
CAS Number	13106-76-8;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:91249 ;
ChemSpider	17339732;
ECHA InfoCard	100.032.741
EC Number	236-031-3;
PubChem CID	61578;
CompTox Dashboard (EPA)	DTXSID5051654 ;
	InChI InChI=1S/Mo.2H3N.4O/h;21H3;;;;/q;;;;;2-1/p+2 Key: APUPEJJSWDHEBO-UHFFFAOYSA-P;
	SMILES [NH4+].O=[Mo]([O-])([O-])=O.[NH4+];
Properties
Chemical formula	(NH4)2MoO4
Molar mass	196.02 g/mol
Appearance	colorless monoclinic crystals
Density	2.276 g/cm3
Melting point	decomposes upon heating
Solubility in water	soluble
Solubility	insoluble in alcohol and liquid ammonia
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H335, H412
Precautionary statements	P261, P264, P264+P265, P270, P271, P273, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1870 mg/kg (rabbit, oral); 2200 mg/kg (guinea pig, oral); 1600 mg/kg (cat, oral)
LDLo (lowest published)	120 mg Mo/kg (rat, oral); 120 mg Mo/kg (guinea pig, oral)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ammonium orthomolybdate is the inorganic compound with the chemical formula (NH₄)₂MoO₄. It is a white solid that is prepared by treating molybdenum trioxide with aqueous ammonia. Upon heating these solutions, ammonia is lost, to give ammonium heptamolybdate ((NH₄)₆Mo₇O₂₄·4H₂O).