... -Trihydroxy Benzoic Acid,CHEMICAL phosphoric acid Chemical Name: 3,4,5 -Trihydroxy Benzoic AcidPhysical Properties: White or grayish white ... aether.Specification: Conforming to European Standard-93 (First Grade), Japanese National Standard (JIS) Standard (First Grade), 21st edition of USA ... in the analysis of rare metals.GALLIC ACID,3,4,5 -Trihydroxy Benzoic Acid,CHEMICAL phosphoric acid