Making Nylon: It has now been 14 years since I was i

Making Nylon: It has now been 14 years since I was i
Sulfur hexafluoride: I require information on availability, safety, cost and suppliers of sulfur hexafluride.
This online resource is a source of science-related images.
Sharps container disposal: Hi. I just want to know where we should dispose our full sharps container.
Supply of large calcium carbonate marble chips: I have been asked to purchase large calcium carbonate marble chips, as the chem supply ones are the wrong size. any suggestions??
Plant ecology - oxygen-producing plants: What aquatic plants are legal to use for photosynthesis experiments in Australia, in particular Western Australia?
Photocopier / printer stored outside chemical store room: Hi I have just come back off holidays to find a large photocopying machine placed opposite the door to my Chemical Store room—within a metr
Electrical standards for classroom laboratories:
Gallium Metal: Hi, I was wondering what your thoughts were on the use of gallium in schools (Years 7–12) for the purpose of demonstrating the melting point of metals and possibly other experiments.
This downloadable document is a Standard Operating Procedure (SOP) and detailed procedure for demonstrating the Van de Graaff generator.