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Phosphates and phosphorus salts

Phosphite

Also known as Trioxidophosphane, Phosphites, Alendronate EP Impurity C

CAS 14901-63-4Formula O3P-3Molar mass 78.97 g/mol
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Phosphite chemical structure, O3P-3, CAS 14901-63-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
14901-63-4
Formula
O3P-3
Molar mass
78.97 g/mol
HS code
283510
Category
Phosphates and phosphorus salts

What is Phosphite?

Plain description, key identifiers and synonyms

Phosphite(3-) is a trivalent inorganic anion obtained by removal of all three protons from phosphorous acid. It is a phosphite ion and a trivalent inorganic anion. It is a conjugate base of a hydrogenphosphite.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
phosphite
CAS number
14901-63-4 CAS number cross-checked
Molecular formula
O3P-3
InChIKey
AQSJGOWTSHOLKH-UHFFFAOYSA-N
InChI
InChI=1S/O3P/c1-4(2)3/q-3
SMILES (canonical and isomeric)
[O-]P([O-])[O-]

Synonyms

  • Trioxidophosphane
  • Phosphites
  • Alendronate EP Impurity C
  • phosphite(3-)
  • trioxophosphate(3-)
  • trioxophosphate(III)
  • trioxidophosphate(3-)
  • PO3(3-)
  • [PO3](3-)

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
78.97 g/molcalc.
Exact mass
78.9602 Dacalc.
LogP (octanol/water)
-2.71calc.
Topological polar surface area
69.18 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
-3calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

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.

Phosphite suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 10 suppliers
10 of 10 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

10 suppliers in 8 countries

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Phosphite price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Functional uses

  • Antioxidant
  • Catalyst
  • Heat stabilizer

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 Phosphite is traded under.

HS 2835.10Indicative HS code

Phosphinates (hypophosphites) and phosphonates (phosphites)

World exports in 2024
$168M
+1.4% vs 2023, imports $163M
2019 to 2024
Top exporters
  1. China69.2%
  2. United States6.5%
  3. Switzerland * partner reported4.5%
Top importers
  1. United States12.5%
  2. Germany10.9%
  3. Malaysia9.8%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Phosphite?

Phosphite(3-) is a trivalent inorganic anion obtained by removal of all three protons from phosphorous acid. It is a phosphite ion and a trivalent inorganic anion. It is a conjugate base of a hydrogenphosphite.

What is the CAS number of Phosphite?

The CAS registry number of Phosphite is 14901-63-4.

What is the molecular formula and weight of Phosphite?

The molecular formula of Phosphite is O3P-3 and its molar mass is 78.97 g/mol.

What is Phosphite used for?

Known uses and roles of Phosphite include heat stabilizers in plastics and polymers, antioxidant, catalyst and heat stabilizer.

Is Phosphite hazardous?

No GHS hazard classification for Phosphite 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 Phosphite?

Phosphite is usually classified under HS code 283510 (Phosphinates (hypophosphites) and phosphonates (phosphites)). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Phosphite?

CompoundList lists 10 suppliers of Phosphite in China, Czech Republic, United Kingdom, Greece and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Phosphite in India?

1 supplier in India list Phosphite on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Phosphite?

Suppliers quote Phosphite 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 Phosphite

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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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