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Polyphosphoric Acid

Polyphosphoric Acid

CAS Number: 8017-16-1

Molecular Formula: H (n+2) PnO(3n+1)

Dehydrating & cyclization agentNon-Aqueous Acidic CatalystIntermediate & Precursor

About Polyphosphoric Acid

Polyphosphoric Acid (PPA) is a viscous inorganic liquid that acts as a concentrated form of phosphoric acid. oligomer and polymer mixture of phosphoric acid, typically defined by its equivalent P205 content, with common grades ranging from 80% to 85% P2Os (corresponding to 105% to 115% equivalent H3PO4). Chemically, PP...

Polyphosphoric Acid Specifications

CAS Number
8017-16-1
Molecular Formula
H (n+2) PnO(3n+1)
Molecular Weight
337.93
IUPAC Name
Poly(oxy(phosphoryl)) dihydroxide
Canonical SMILES
O=P(O)(O)O (Monomeric unit)
InChI Key
RZJOMKAYJRHKIN-UHFFFAOYSA-N (Basic unit)
EINECS Number
232-416-9 / 232-417-0
MDL Number
MFCD00084474
HSN No
28092000
Molecular Weight
337.93
Physical State
liquid
Boiling Point
Decomposes at approx 250 °C to H3P04 and P2Os
Melting Point
16ºC
Freezing point
Typically - 20 °C to - 5 °C, depending on P205 content
Corrosivity
Corrosive
Autoignition Temperature
Not flammable
Density
2.06 g/mL at 25 °C
RIDADR
3264
Risk Statements Code
34
Safety Statements Code
45-36/37/39-25-26
GHS Classification
Corrosion (Skin and Eye Damage Category 1B)
Transport Condition
Highly corrosive material (UN 3264, Corrosive Liquid, Acidic, Inorganic, N.O.S.) and must be shipped in approved, lined containers with mandatory hazard labelling, requiring compliance with all national and international dangerous goods regulations

Synthetic Reagent

Used as a non-aqueous acidic medium and dehydrating agent in cyclization reactions (e.g., acylation, Friedel-Crafts for fine chemical synthesis

Catalyst

Strong acidic catalyst in polymerization and condensation reactions

Agrochemicals Intermediate Precursor

Production of organophosphorus compounds, including certain pesticides and herbicides

Stabilizer/Binder

Specialty refractory cements and binding agents where high strength and thermal stability are required

Polymers & Plastics Additive

Functions as a curing agent or hardener in certain epoxy resins and coatings.

Temperature

Store below +30°C.

Storage Condition

Keep container closed when not in use. Keep away from water. Corrosives area. Do not store in metal containers.

Stability

Incompatible with strong bases. Hygroscopic.

Protection

Moisture (hydrolyzes exothermically), high temperatures, and incompatible materials.

Shelf Life

Keep containers tightly sealed to prevent moisture absorption and maintain concentration. Chemically stable when stored correctly.

Polyphosphoric Acid FAQs

Minimum Order Quantity

25 kg (pilot) · 1 MT (commercial)

Lead Time

3 – 5 weeks ex-works

Incoterms

FOB · CIF

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

Regional Availability

India · EU · Middle East · Southeast Asia

Documentation

SDS · COA · TDS available on request

Compliance & Quality

REACH registered*

GHS/SDS available

ISO 9001:2015 site*

RoHS compliant*

Global sourcing network

Consistent quality & reliability

End-to-end technical support

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