Na4O7P2
265.9 g/mol
Food AdditiveDanger
Sodium pyrophosphate
CAS7722-88-5EC231-767-1
Category
Food Additive
Compound Class
Inorganic Salt
Primary Use
Detergent builder and food additive
Sodium pyrophosphate, also known as tetrasodium pyrophosphate (TSPP), is an inorganic salt composed of the pyrophosphate anion and sodium ions. It appears as a white, water-soluble solid and is commonly employed as a detergent builder and a food additive.
Detergent builderFood additive
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
StrongSame Parent
Iron(III) pyrophosphate
CAS10058-44-3
Industrial and pharmaceutical raw material
StrongSame Parent
Potassium pyrophosphate
CAS7320-34-5
Chelating agent
ReferenceSame Category
Magnesium phosphate
CAS7757-87-1
food additive and dietary supplement
ReferenceSame Category
Dicalcium phosphate
CAS7757-93-9
mineral supplement and leavening agent
ReferenceSame Category
Potassium iodate
CAS7758-05-6
oxidizing agent in chemical analysis
ReferenceSame Category
Dibasic potassium phosphate
CAS7758-11-4
buffering agent and emulsifier
Referencestereoisomer of
Disodium pyrophosphate
CAS7758-16-9
Baking powder acidulant and food additive
Safety Reference
Danger
H302Harmful if swallowed
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H335May cause respiratory irritation
H312Harmful in contact with skin
H332Harmful if inhaled
H413May cause long lasting harmful effects to aquatic life
Customs Tariff Classification
The international HS code for Sodium pyrophosphate (CAS 7722-88-5) is 2835.39.
HS code (international, 6-digit)
2835.39
EU CN code (8-digit)
2835 39 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
tetrasodium;phosphonato phosphate
InChIKey
FQENQNTWSFEDLI-UHFFFAOYSA-J
SMILES
[O-]P(=O)([O-])OP(=O)([O-])[O-].[Na+].[Na+].[Na+].[Na+]
Synonyms (31)
- PYP
- TSPP
- Sodium pyrophosphate (USAN)
- Diphosphoric acid tetrasodium
- Natrium pyrophosphat
- Natrium pyrophosphat [German]
- Phosphotex
- SODIUM PYROPHOSPHATE [MART.]
- Sodium diphosphate
- Sodium diphosphate (Na4P2O7)
- Sodium diphosphate tetrabasic
- Sodium diphosphate, anhydrous
- Sodium phosphate (Na4P2O7)
- Sodium pyrophosphate
- Sodium pyrophosphate anydrous
- TETRASODIUM PYROPHOSPHATE
- Tetranatriumpyrophosphat
- Tetrasodium Pyrophosphoate
- Tetrasodium diphosphate
- V34 Colour Corrector
- Victor TSPP
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