Collection of Laboratory Waste
Laboratory waste should be collected for disposal in separate containers according to the type of chemical involved. The containers can, for example, be labelled according to the schedule described below and labelled with the letters A-K. In doing so, it must be ensured that the chemicals collected in any one category cannot react with each other. At least a check should be made for acid and base content. Many disposal companies require a neutral solution to be provided.
|A||Halogen-free organic solvents and organic substances in solution.|
|B||Halogen-containing organic solvents and organic substances in solution. Attention: Do not use aluminium containers!|
|C||Solid residues of organic laboratory chemicals.|
|D||Salts in solution; the contents of such containers should be adjusted to pH 6-8.|
|E||Toxic inorganic residues and salts of heavy metals and solutions.|
|F||Toxic flammable compounds.|
|G||Mercury and inorganic mercury salt residues.|
|H||Metallic-salt residues; each metal should be collected separately.|
|K||Separate collection of glass, metal, and plastic waste materials.|
The collecting vessels should be clearly labelled with the contents and provided with hazard symbols and safety phrases. Please note that double labelling may be necessary, e.g. if flammable liquids are collected in aqueous solutions of category D, if organic solutions react caustically, if bases and acids are contained or if poisons are collected in categories other than E and F.
Special labels and statutory hazard symbols are listed in the catalog under "Laboratory equipment, accessories, and safety products".
Of course, other categories may be designated if:
Thus, it is recommended that those substances hazardous to health as well as irritating and poisonous substances be collected together; however, two containers - one for substances that are hazardous to health and the other for poisonous substances - may be used.
Collect: Remove and treat only in exceptional cases. Apply the principle of minimum personal safety risk!
Treat: if spontaneously flammable, oxidizing, or reactive with water or other substances. To prevent uncontrolled reactions, it is in principle recommended to pack waste chemicals individually (plastic bags or containers) before placing them in collecting vessels! Special caution should be taken with explosive substances, which should be disposed of separately only in phlegmatized form
In order to enable laboratory waste to be disposed of properly and to minimise the effect on laboratory routines, collection containers designated for waste materials must be:
In addition, the following points should be taken into account:
A selection of UN-approved containers is listed in the catalog under "Laboratory equipment, accessories, and safety products".
Based on experience of the routines of many laboratories, the following containers can be recommended: