also: ピロりんさん
pyrophosphoric acid
A chemical compound; used in technical and scientific contexts.
Pyrophosphoric acid is sometimes used as a food additive.
Rare variant using the older kanji 燐 for phosphorus; the reading ピロりんさん is restricted to this form.
From English 'pyro-' + 'phosphoric acid', adapted into Japanese as ピロリン酸.