... .we have our own factory. CAS Number:56-25-7Name:4,7-Epoxyisobenzofuran-1,3-dione,hexahydro-3a,7a ... 3aR,4S,7R,7aS)-rel- Molecular Structure: Synonyms:4,7-Epoxyisobenzofuran-1,3-dione,hexahydro-3a,7a-dimethyl-, (3aa ... camphor;Cantharidine; Cantharone; Hexahydro-3a,7a-dimethyl-4,7-epoxyisobenzofuran-1,3-dione;Kantaridin; NSC 61805; exo-1 ... acrid and irritating fumes. Cantharidine 99%,CAS Number:56-25-7