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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Reference substances

Reference substances

Currently viewing:
IUPAC name:
Sodium acid pyrophosphate

Inventory

EC number:
231-835-0
EC name:
Disodium dihydrogenpyrophosphate
CAS number:
7758-16-9
CAS number:
7758-16-9
Synonyms
Names:
Disodium diphosphate
Polyphosphoric acids, sodium salts
diphosphoric acid disodium salt
disodium diphosphate
disodium pyrophosphate
sodium pyrophosphate dibasic
Identifier:
IUPAC name
Disodium dihydrogen diphosphate
Identifier:
IUPAC name
Sodium acidpyrophosphate
Identifier:
IUPAC name
disodium [hydroxy(oxido)phosphoryl] hydrogen phosphate
Identifier:
IUPAC name
disodium [hydroxy(oxido)phosphoryl] hydrogen phosphate
Identifier:
other: Molecular formula
H2Na2O7P2
Identifier:
other: InChl
InChI=1/2Na.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-2
Identifier:
other: SMILES notation
[Na+].[Na+].[O-]P(=O)(O)OP([O-])(=O)O
Identifier:
other: SMILES notation
[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O

Molecular and structural information

Molecular formula:
H4O7P2.2Na
Molecular weight:
> 222 - < 224
SMILES notation:
OP(=O)([O-])OP(=O)(O)[O-].[Na+].[Na+]
InChl:
1/2Na.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+1;/p-4
Structural formula:
Chemical structure

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