Aluminium dihydrogenphosphate

Aluminium dihydrogenphosphate
Identifiers
CAS Number	13530-50-2;
3D model (JSmol)	Interactive image;
EC Number	236-875-2;
PubChem CID	9818426;
	InChI InChI=1S/Al.3H3O4P/c;31-5(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
Safety data sheet	External SDS
GHS pictograms	[1]
GHS hazard statements	H318
GHS precautionary statements	P280, P305+351+338, 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 aluminum 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.[2]

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.[3]

References

"Aluminum Phosphate Monobasic". American Elements. Retrieved January 21, 2019.
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.CS1 maint: uses authors parameter (link)
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.CS1 maint: uses authors parameter (link)

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[sds-1] "Aluminum Phosphate Monobasic". American Elements. Retrieved January 21, 2019.

[Ullmann-2] 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.CS1 maint: uses authors parameter (link)

[3] 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.CS1 maint: uses authors parameter (link)