different between thioacid vs sulphophosphoric

English

thio- +? acid

thioacid (plural thioacids)

(chemistry) Any acid formally derived from an oxyacid by replacement of one or more oxygen atoms with sulfur.

sulpho- +? phosphoric

sulphophosphoric (not comparable)

(chemistry) Of, pertaining to, or designating a hypothetical thioacid of phosphorus, analogous to phosphoric acid, and known only in its salts.

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