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CAS 7758-29-4 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

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InventoryRef 3648615/10/2010

PENTASODIUM TRIPHOSPHATE

Pentasodium triphosphate

PENTASODIUM TRIPHOSPHATE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 7758-29-4

CAS 7758-29-4PubChem CID 24455

Sodium Tripolyphosphate

Sodium tripolyphosphate is an inorganic compound with formula Na5P3O10 and the sodium salt of the polyphosphate penta-anion. It is used as a component of a wide range domestic and industrial products, particularly detergents. — DrugBank

IUPAC name: pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate

Molecular formula: Na5O10P3
Molecular weight: 367.86 g/mol
Exact mass: 367.8192786 Da
Topological polar surface area: 185.0 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 10
Covalent units: 6
Defined stereocentres: 0

Also known as

Pentasodium triphosphateSTPPArmofosThermphosRhodiaphos LVThermphos NTriphosphoric acid, pentasodium saltThermphos SPR

16 more reported names

Thermphos L 50Sodium phosphate (Na5P3O10)Sodium triphosphate (Na5P3O10)9SW4PFD2FZS 400RefChem:1714745HK03SA80JSODIUM TRIPOLYPHOSPHATE, UNSPECIFIED231-838-7Sodium triphosphateCaswell No. 799HSDB 1099EINECS 231-838-7UNII-9SW4PFD2FZEPA Pesticide Chemical Code 076404Na5P3O10

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External database identifiers

EPA DTXSID:DTXSID9036307

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for PENTASODIUM TRIPHOSPHATE

INCI name

PENTASODIUM TRIPHOSPHATE

Description

Pentasodium triphosphate

Record provenance

Inventory reference: 36486
Imported identity: PENTASODIUM TRIPHOSPHATE
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for PENTASODIUM TRIPHOSPHATE

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Key data

CAS

7758-29-4

231-838-7

Restriction

—

Function

BUFFERING: Stabilising the pH of an aqueous medium in a narrow range even if an acid or base is added. Altering and/or maintaining a cosmetic product's pH at the desired level.
CHELATING: Forming complexes with metal ions which could affect the stability and/or appearance of cosmetics.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#20434 · PENTASODIUM TRIPHOSPHATE

Ingredients with overlapping formulation functions

PENTAPOTASSIUM TRIPHOSPHATEBUFFERING, CHELATING

PENTASODIUM AMINOTRIMETHYLENE PHOSPHONATECHELATING

PENTASODIUM ETHYLENEDIAMINE TETRAMETHYLENE PHOSPHONATECHELATING, VISCOSITY CONTROLLING

PENTASODIUM PENTETATECHELATING

PENTETIC ACIDCHELATING

PHOSPHONOBUTANETRICARBOXYLIC ACIDANTICORROSIVE, BUFFERING, CHELATING

PHOSPHORUS PENTOXIDEBUFFERING, CHELATING

PHYTIC ACIDCHELATING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How PENTASODIUM TRIPHOSPHATE appears in the CosIng inventory

The CosIng inventory lists PENTASODIUM TRIPHOSPHATE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

PENTASODIUM TRIPHOSPHATE is also tagged with 2 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

PENTASODIUM TRIPHOSPHATE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, PENTASODIUM TRIPHOSPHATE carries the following function designation(s):

CAS 7758-29-4 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Source note for PENTASODIUM TRIPHOSPHATE

This page reproduces the CosIng inventory entry for PENTASODIUM TRIPHOSPHATE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research PENTASODIUM TRIPHOSPHATE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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