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Phosphates and phosphorus salts

Trimetaphosphate

Also known as 1,3,5,2,4,6-trioxatriphosphinane-2,4,6-triolate 2,4,6-trioxide, Trimetaphosphate ion, Cyclotriphosphate

CAS 15705-55-2Formula O9P3-3Molar mass 236.91 g/mol
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Trimetaphosphate chemical structure, O9P3-3, CAS 15705-55-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
15705-55-2
Formula
O9P3-3
Molar mass
236.91 g/mol
HS code
283539
Category
Phosphates and phosphorus salts

What is Trimetaphosphate?

Plain description, key identifiers and synonyms

Cyclotriphosphate(3-) is a trivalent inorganic anion obtained by removal of all three protons from cyclotriphosphoric acid., major species at pH 7.3. It is a triphosphate ion and a trivalent inorganic anion. It is a conjugate base of a cyclotriphosphoric acid.

Trimetaphosphate is an anion, fully deprotonated trimetaphosphoric acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,4,6-trioxido-1,3,5,2λ5,4λ5,6λ5-trioxatriphosphinane 2,4,6-trioxide
CAS number
15705-55-2
Molecular formula
O9P3-3
UNII
VV97AF839F
InChIKey
AZSFNUJOCKMOGB-UHFFFAOYSA-K
InChI
InChI=1S/H3O9P3/c1-10(2)7-11(3,4)9-12(5,6)8-10/h(H,1,2)(H,3,4)(H,5,6)/p-3
SMILES (canonical and isomeric)
[O-]P1(=O)OP(=O)(OP(=O)(O1)[O-])[O-]

Synonyms

  • 1,3,5,2,4,6-trioxatriphosphinane-2,4,6-triolate 2,4,6-trioxide
  • Trimetaphosphate ion
  • Cyclotriphosphate
  • Trimetaphosphate trianion
  • Metaphosphate (P3O93-)
  • cyclotriphosphate(3-)
  • cyclotriphosphate trianion
  • 2,4,6-trioxido-1,3,5,2lambda5,4lambda5,6lambda5-trioxatriphosphinane 2,4,6-trioxide
  • tri--oxido-tris(hydroxidooxidophosphorus)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
236.91 g/molcalc.
Exact mass
236.8772 Dacalc.
LogP (octanol/water)
-1.55calc.
Topological polar surface area
148.1 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
9calc.
Rotatable bonds
0calc.
Heavy atoms
12calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
-3calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=[PH]1O[PH](=O)O[PH](=O)O1

O=[PH]1O[PH](=O)O[PH](=O)O1

1 ring, 9 atoms.

11 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Trimetaphosphate suppliers

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Trimetaphosphate price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Trimetaphosphate is traded under.

HS 2835.39Indicative HS code

Polyphosphates, other

World exports in 2024
$983M
+0.1% vs 2023, imports $980M
2019 to 2024
Top exporters
  1. China35.2%
  2. Germany19.2%
  3. United States9.7%
Top importers
  1. United States10.2%
  2. United Kingdom6.1%
  3. France * partner reported4.5%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Trimetaphosphate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Trimetaphosphate, based on the data on this page

What is Trimetaphosphate?

Cyclotriphosphate(3-) is a trivalent inorganic anion obtained by removal of all three protons from cyclotriphosphoric acid., major species at pH 7.3. It is a triphosphate ion and a trivalent inorganic anion. It is a conjugate base of a cyclotriphosphoric acid.

What is the CAS number of Trimetaphosphate?

The CAS registry number of Trimetaphosphate is 15705-55-2.

What is the molecular formula and weight of Trimetaphosphate?

The molecular formula of Trimetaphosphate is O9P3-3 and its molar mass is 236.91 g/mol.

Is Trimetaphosphate hazardous?

No GHS hazard classification for Trimetaphosphate is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Trimetaphosphate?

Trimetaphosphate is usually classified under HS code 283539 (Polyphosphates, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Trimetaphosphate?

Post a free request on CompoundList and suppliers of Trimetaphosphate will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Trimetaphosphate?

Suppliers quote Trimetaphosphate on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Trimetaphosphate

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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