Chemicals (cold pack practical): I would like use the following chemicals for a cold pack prac: ammonium chloride, ammonium nitrate, magnesium sulfate and sodium thiosulfate.

Chemicals (cold pack practical): I would like use the following chemicals for a cold pack prac: ammonium chloride, ammonium nitrate, magnesium sulfate and sodium thiosulfate.
Storage of copper powder: Could you please advice me how and where to keep this copper powder (Chem Supply) as in the SDS it has been marked as a DG 4.1 PGII?
Oxidising Chemicals: While updating Safety Data Sheets (SDSs), I found some confusing changes in the listing of some nitrates.
Calcium Metal: Can you please tell me how I can safely dispose of a very small amount of Calcium metal, which has not been used for a long time.
Lightning in a test tube: I have a teacher who is planning on performing the 'lightning in a test tube' demonstration in the school lecture theatre.
Portable Bunsen burners: In August 2013, a Qld Dept Education Health and Safety Consultant advised us that the Australian Gas Association (AGA) and Qld Petroleum and Gas Inspectorate have decided t
Ammonium nitrate: Hi, Has anyone else had any trouble with ammonium nitrate absorbing water? Mine has become a clear mixture of liquid and crystals.
Disposal of empty helium cylinders: From browsing Google, there seems to be a lot of confusion on how to dispose of empty helium gas cylinders.
Phenylthiocarbamide (PTC) paper used in genetics: Are we still allowed to pu
Disposal of silver nitrate solid: I have collected silver nitrate solution in a winchester and decanted it off, ready to evaporate the solution, so that I am left with just the solid waste.