Other Wastes Known to be Hazardous
There are many chemicals currently in use which meet neither the EPA’s criteria of a listed hazardous waste nor a characteristic hazardous waste. These substances present enough of a danger to humans or the environment, however, that management as a hazardous waste is the best option.
Laboratory workers should always review all new product Material Safety Data Sheets (MSDSs) before commencing work with the new reagent. When chemical products carry safety warnings which caution users against symptoms/effects such as skin irritation, eye damage, noxious fumes, or acrid odors, lab workers are directed to take a conservative approach and manage these substances as hazardous waste. This action will provide an additional level of protection to building services personnel by minimizing their chance of exposure, and will also prevent these substances from being inadvertently released to the campus environment.
The following is a partial list of these types of substances, which lab workers should manage as hazardous waste.
- Concentrated stock solutions and stained agarose gels containing Ethidum Bromide
- Corrosive solids, such as anhydrous metal salts or solid hydroxide compounds (i.e. sodium hydroxide or potassium hydroxide pellets, commonly used to adjust pH’s of working solutions)
- Carcinogens (dioxins, asbestos, aldehydes, etc.), mutagens, or teratogens
- State sanitary sewer guidelines prohibit drain disposal of liquids with pH < 5.0.
Check SDS information or measure pH of liquid to confirm.