. "copper sulphate"@en-us . "a copper salt made by the action of sulfuric acid on copper oxide"@en-us . . . "113978643"@en-us . . "cupric sulphate"@en-us . . "14822839-n"^^ . "0"^^ . "copper sulfate"^^ . . "0"^^ . . . . "114822839"^^ . "110634625"@en-us . "copper sulfate"@en-us . . . . "cupric sulfate"@en-us .