Anhydrous tetrasodium pyrophosphate
[CAS 93269-17-1]

Identification

• Name: Anhydrous tetrasodium pyrophosphate
• Synonyms: D05873; Sodium Pyrophosphate (Usan); 04286_Riedel
• Molecular Formula: Na₄O₇P₂
• Molecular Weight: 265.90
• CAS Registry Number: 93269-17-1 (10042-91-8)
• SMILES: O=[P](O[P]([O-])([O-])=O)([O-])[O-].[Na+].[Na+].[Na+].[Na+]
• InChI: 1S/4Na.H4O7P2/c;;;;1-8(2,3)7-9(4,5)6/h;;;;(H2,1,2,3)(H2,4,5,6)/q4*+1;/p-4
• InChIKey: FQENQNTWSFEDLI-UHFFFAOYSA-J

Properties

• Density: 2.534 (Expl.)
• Melting point: 988°C (Expl.)
• solubility: Soluble in water, with slow hydrolysis to sodium orthophosphate
• solubility: Soluble in water, with slow hydrolysis to sodium orthophosphate

Safety Data

• Safety Code: S26;S37
• Risk Code: R36/37/38
• Hazard Symbol: X
• Safety Description: Safety glasses.

References

• (1): Peggy Gunkel-Grillon and Jacques Buffle. Speciation of Cu(ii) with a flow-through permeation liquid membrane: discrimination between free copper, labile and inert Cu(ii) complexes, under natural water conditions, Analyst, 2008, 133, 954.