Aluminium dihydrogenphosphate

Aluminium dihydrogenphosphate

Identifiers
CAS Number	13530-50-2  Y
3D model (JSmol)	Interactive image
ChemSpider	7994176
ECHA InfoCard	100.033.508
EC Number	236-875-2
PubChem CID	9818426
CompTox Dashboard (EPA)	DTXSID2094005
InChI InChI=1S/Al.3H3O4P/c;3*1-5(2,3)4/h;3*(H3,1,2,3,4)/q+3;;;/p-3 Key: RGPUVZXXZFNFBF-UHFFFAOYSA-K
SMILES OP(=O)(O)[O-].OP(=O)(O)[O-].OP(=O)(O)[O-].[Al+3]
Properties
Chemical formula	AlH6O12P3
Molar mass	317.939 g·mol−1
Appearance	white solid
Density	2.37 g/cm3
Hazards
GHS labelling:
Pictograms
Hazard statements	H318
Precautionary statements	P280, P305+P351+P338, P310
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Aluminium dihydrogenphosphate describes inorganic compounds with the formula Al(H₂PO₄)₃^.xH₂O where x = 0 or 3. They are white solids. Upon heating these materials convert sequentially to a family of related polyphosphate salts including aluminium triphosphate (AlH₂P₃O₁₀^.2H₂O), aluminium hexametaphosphate (Al₂P₆O₁₈), and aluminium tetrametaphosphate (Al₄(P₄O₁₂)₃). Some of these materials are used for fireproofing and as ingredients in specialized glasses. ^[1]

According to analysis by X-ray crystallography, the structure consists of a coordination polymer featuring octahedral Al³⁺ centers bridged by tetrahedral dihydrogen phosphate ligands. The dihydrogen phosphate ligands are bound to Al³⁺ as monodentate ligands. ^[2]

References

1. Klaus Schrödter; Gerhard Bettermann; Thomas Staffel; Friedrich Wahl; Thomas Klein; Thomas Hofmann (2008). "Phosphoric Acid and Phosphates". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a19_465.pub3. ISBN   978-3527306732. S2CID   94458523.
2. Brodalla, D.; Kniep, R.; Mootz, D. (1981). "Eine neue Form von Al(H₂PO₄)₃ mit dreidimensionaler Al-O-P Vernetzung" [A new form of Al(H₂PO₄)₃ with three-dimensional Al-O-P crosslinking]. Zeitschrift für Naturforschung B. 36: 907–909. doi: 10.1515/znb-1981-0803 .