Polyphosphoric Acid is used in organic synthesis for cyclizations and acylations. It is also used industrially as a dehydrating agent, catalyst, and oxidizing agent.
Specifications

Appearance: Colorless Viscous Clear Liquid
Phosphoric Acid H3PO4, % w/w: 115 Min
Arsenic as As, ppm: 100 Max
Sulphate as SO4, ppm: 100 Max
Iron as Fe, ppm: 20 Max
Nitrate as NO3, ppm: 5 Max
Total Heavy Metals as Pb, ppm: 20 Max
Color, ppm: 30 Max
Fluoride as F, ppm: 10 Max
Phosphate P2O5, % w/w: 83.30 Min
Gravity (at 20�°C): 2.015 Min
Packing

749.564 Lb (340 KG) drum, 4 drums per pallet
3527.36 lbs (1600 kg) IBC Tote
DOT Transportation

UN/NA: UN3264
Proper Shipping Name: Corrosive Liquid, Acidic, Inorganic, N.O.S. (Polyphosphoric Acids)
Hazard Class: 8
Packing Group: III