sodium thiosulfate vs sodium thiosulphate

sodium thiosulfate and sodium thiosulphate both are nouns.

Word	Noun	Adjective	Verb	Adverb
sodium thiosulfate	Yes	No	No	No
sodium thiosulphate	Yes	No	No	No

As nouns, sodium thiosulfate and sodium thiosulphate are synonyms defined as:

sodium thiosulfate and sodium thiosulphate: a compound used as a fixing agent in photographic developing

Other synonyms of sodium thiosulfate include hypo.

sodium thiosulfate (noun)	sodium thiosulphate (noun)
a compound used as a fixing agent in photographic developing	a compound used as a fixing agent in photographic developing