Chemical Waste Management

Chemical waste should be treated as hazardous. Follow these rules:

  1. It is forbidden to dispose chemicals into the sink or the sewage.
  2. There are six categories of Chemical waste:
    • Organic materials
    • Organic materials with halogens
    • Inorganic materials
    • Acids
    • Bases
    • Ethidium bromide
  3. Prior to disposal of the waste, label the container appropriately according to the above categories.
  4. A cabinet for collecting the labeled chemical waste must be available on each floor.
  5. Collect liquid waste in glass bottles (up to 2L) or plastic bottles (up to 5L). The containers must be clean of any remnant of chemical and dry, in order to avoid accidents resulting from reaction between incompatible reagents (e.g. acid+organic solvent, nitric acid+alcohol). Chemicals should not be disposed in lab vessels such as  beakers, Erlenmeier, etc.
    Chemical in solid form (powders etc.) should be disposed in the original container or in plain plastic bags carrying the label with full  information on the material.
    • Hydrofluoric acid (HF) – should be disposed in a polypropylene container.
    • Nitric acid, concentrated – should be disposed in a glass bottle.
    • Halogen solvents (such as chloroform, methyl chloride) – should be disposed in glass bottles. 
  6. Chemical waste is segregated in the lab, by the lab worker, according to the following guidelines.