Ammonium paratungstate

Ammonium paratungstate (or APT) is a white crystalline salt with the chemical formula (NH4)10(H2W12O42)·4H2O. It is described as "the most important raw material for all other tungsten products."

Ammonium paratungstate
Identifiers
ChemSpider
ECHA InfoCard 100.031.228
EC Number
  • 234-364-9
PubChem CID
UNII
  • InChI=1S/10H3N.41O.12W/h10*1H3;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;5*-2;;;;;;;;;;;;/p+10 Y
    Key: LZTNPCZGBGTJFN-UHFFFAOYSA-X Y
  • InChI=1/10H3N.41O.12W/h10*1H3;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;5*-2;;;;;;;;;;;;/p+10/r10H3N.12O3W.5O/c;;;;;;;;;;12*1-4(2)3;;;;;/h10*1H3;;;;;;;;;;;;;;;;;/q;;;;;;;;;;;;;;;;;;;;;;5*-2/p+10
    Key: LZTNPCZGBGTJFN-GEIIXCJIAC
Properties
(NH4)10(H2W12O42)·4H2O
Molar mass 3132.2 g/mol
Appearance White solid
Density 4.60 g/cm3
Boiling point Decomposes at 600 °C
Hazards
GHS labelling:
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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