alginic acid vs algin

alginic acid and algin both are nouns.

Word	Noun	Adjective	Verb	Adverb
alginic acid	Yes	No	No	No
algin	Yes	No	No	No

As nouns, alginic acid and algin are synonyms defined as:

alginic acid and algin: a gum used especially as a thickener or emulsifier

alginic acid (noun)	algin (noun)
a gum used especially as a thickener or emulsifier	a gum used especially as a thickener or emulsifier