Storage and disposal of deliquescent chemicals - Zinc Nitrate: Hi, My bottle of zinc nitrate has liquid in it and the bottle has expanded. It does not look right.

Storage and disposal of deliquescent chemicals - Zinc Nitrate: Hi, My bottle of zinc nitrate has liquid in it and the bottle has expanded. It does not look right.
Use of iron III nitrate and zinc nitrate: Is it still okay to use iron III nitrate and zinc nitrate, as they are not listed on the Recommended List of Chemicals for Schools.