Water-soluble polymers sodium polyacrylate, guar gum, casein, etc. Water-reactive materials lithium, sodium, and other alkali metals Chemicals with a foul odor Toxic chemicals carcinogens, mutagens, teratogens; indicated on SDS Substances with a boiling point lower than 50 o C Insoluble solids, including hair, ash, sand, metal, or glass Oil or grease Mixture that includes any of the above substances Source : Lab Waste Drain Disposal , Montana State University accessed February 1, Which chemicals are acceptable for drain disposal?
Those that meet criteria for trash disposal Acids and bases with a pH between 5. Please note , if you have a compound that is not a pairing of a cation and anion on this list, it is NOT safe for drain disposal and should be disposed with hazmat pickup. What to do with hazardous materials Hazardous materials provide a unique problem for high school chemistry teachers, because most of us do not have a quick and safe way to store or dispose of them.
Leave the bag open so most of the water can be evaporated in a fume hood. When this five-gallon bucket is full of bags of sludge, dispose of it as hazardous waste. Corrosive liquids, such as strong acids and bases, should be disposed of as hazardous waste.
However, if appropriately diluted to a pH between 5. What to purchase to update storage Be certain your lab has dedicated cabinets for flammables and corrosives. Helpful tips Contact a local college or university for assistance and possible hazmat pickup. Do one shelf at a time. Inform maintenance staff of your disposal activities. Keep a list of incompatible chemicals in your storeroom and do a quick check each time you rearrange for disposal. Planning ahead for next school year Plan — Teachers must decide which chemicals are truly necessary in their laboratories, and safely dispose of the rest.
This keeps dangerous materials and reactions out of the hands of students and avoids other problems. Collect — When laboratory waste is not collected and handled correctly, it can threaten the health and safety of students and school staff alike.
Keeping logs of hazardous waste and clearly labeling it as such are key parts of the solution. Storage — A well-organized and maintained storage system for all chemicals, including wastes, is important for a safe laboratory.
Be sure your waste storage space is secure and cannot be easily bumped or damaged. Your local solid waste district can help you plan a hazardous waste pickup — ideally, at least once per year. Credit: Ralph Stuart. Works Cited American Chemical Society. Montana State University. Lab Waste Drain Disposal , accessed February 1, Skip to content Chemical Safety in Schools. DG Class. DG PG. Guidance notes. Print Alphabetical Search Chemicals listed under S. Home Top Updates Chemwatch.
Chemical Safety in Schools. Home Education, training and skills Pupil wellbeing, behaviour and attendance Health, safety and wellbeing in schools. Guidance Storing and disposing of hazardous chemicals in schools. Applies to England Documents.
This guidance is for school leaders, staff and governing bodies in: maintained schools academies independent schools pupil referral units academy trusts local authorities further education and sixth form colleges It explains how to handle and dispose of hazardous substances and materials, and signposts to professional bodies offering further advice.
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