Specification :

Polyphosphoric acid is used as cyclizing agent, Acylating agent in the organic synthesis process, analytical reagent,and the substitute for phosphoric acid.
Commodity:105-115% polyphosphoric acid
specification: PPA 105-115 PCT MIN
PHOSPHORUS PENTOXIDE AS P205 75.8-83.3PCT MIN
CHLORIDE AS CL 5PPM MAX
SULPHATE AS SO4 50PPM MAX
IRON AS FE 500PPM MAX
ARSENIC AS AS 50PPM MAX
HEAVY METAL AS PB 10PPM MAX
FLUORIDE AS F 50PPM MAX
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