Polyphosphoric Acid, identifiable by CAS 8017-16-1, functions as a powerful dehydrating and cyclizing agent used primarily to modify bitumen for road paving and synthesize organic pigments. Chemically defined as an oligomeric mixture of phosphoric acids, this viscous, colorless to glassy liquid serves as a catalyst in petrochemical alkylation and a reagent in the production of phosphate esters. The substance, often referred to as PPA or Superphosphoric Acid in chemical processing, acts as a high-efficiency ring-closing agent in the synthesis of quinacridones and pharmaceutical intermediates due to its low water content. We facilitate bulk supply of this acidic medium with competitive factory pricing, capable of meeting customized specifications for phosphoric acid content (typically 95% to 118%), backed by comprehensive MSDS, TDS, COA documentation.
Polyphosphoric Acid (PPA) CAS 8017‑16‑1
- CAS: 8017-16-1
- Synonyms: Polyphosphoric acid, PPA acid, Condensed phosphoric acid
- Einecs: 232-417-0
- Molecular Formula: H6P4O13
- Grade: Industrial grade 99%
- Package: 200kg iron drum or 50kg plastic drum packaging
Product Description
Product Name:Polyphosphoric acid
Appearance:Colorless, transparent, viscous liquid
Polyphosphoric acid is a colorless, transparent, viscous liquid, corrosive, and is a dipolar inorganic acid corrosive item. Polyphosphoric acid is a proton acid, which can dissolve a variety of low and high molecular weight organic compounds. It is used as a water loss agent, cyclizing agent, acylating agent in organic synthesis, and is a catalyst or solvent for condensation, cyclization, rearrangement, substitution and other reactions. Polyphosphate (PPE) is sometimes used to increase the solubility of polyphosphate in organic solvents. In addition, polyphosphoric acid is also used as a substitute for orthophosphoric acid and as an analytical reagent.
Formula: H6P4O13
Molecular weight: 337.93
CAS Number: 8017-16-1
Boiling point: 856°C
Solubility: miscible with water
Density: Relative density (water=1) 2.1
Stability: Stable Hazard Mark 20 (Acid Corrosive)
Physical and chemical properties: colorless transparent viscous liquid, easy to deliquescence, non-crystallization
FAQ - Technical & Supply Chain
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Q:
What do 84% and 115% P₂O₅ indicate for Polyphosphoric Acid?
A: These values indicate the equivalent phosphorus pentoxide (P₂O₅) content, which reflects the degree of condensation and acidity of the polyphosphoric acid system. -
Q:
Is Polyphosphoric Acid the same as orthophosphoric acid?
A: No. Polyphosphoric Acid is a condensed form derived from phosphoric acid and differs in composition, viscosity, and functional behavior from orthophosphoric acid.
Documents and Product Support
For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.
- COA for batch-based quality reference
- TDS for key physical and chemical information
- SDS / MSDS for handling, storage, and safety reference
- Packing information for sample, trial, and bulk orders
- Technical communication based on application and specification requirements
Information to Confirm Before Quotation
Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.
- Product name and CAS number
- Application or intended end use
- Required purity, grade, or specification
- Sample quantity, trial order, or bulk demand
- Preferred packing form or net weight
- Destination country or port
- Required documents or compliance expectations
Packaging, Storage, and Handling Notes
Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.
Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.
Sample, Bulk Order and Repeat Supply Support
Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.
For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.
