Aviation waste chemicals include a variety of substances that can be hazardous if not handled or disposed of properly:

• Corrosive materials – Acids and alkaline solutions used for cleaning, degreasing, or etching aircraft
• Flammable liquids – Fuels, solvents, and hydraulic fluids that are highly combustible and pose a fire risk
• Toxic chemicals – Substances that contain heavy metals, pesticides, or other toxic compounds
• Petroleum-based solvents – Used to remove grease and oil from aircraft surfaces, and can also dissolve paints and other coatings

Other types of aviation waste include: – oils, solvents, batteries, fluorescent lamps, de-icing fluids, maintenance materials, office waste, scrap metal, and used oil.

Aviation waste can come from a variety of sources, including aircraft maintenance, fueling operations, and airport waste.

Many materials and liquids in auto repair shops may be considered hazardous waste including:

• Lubricants: Motor oil, transmission fluid, gear oil, and grease help keep a vehicle’s engine running smoothly and prevent parts from wearing out.
• Solvents: Brake cleaner, carburetor cleaner, gasket remover, and parts cleaner are used to clean parts.
• Flammable substances: Gasoline, starting fluid, acetylene, and propane are flammable.
• Paints, varnishes, lacquers, and thinners: Auto body shops use these highly volatile substances.
• Brake oil: A hydraulic fluid that transmits force from the brake pedals to the brake calipers.
• Antifreeze and coolants: Prevent the engine from overheating and keep it cool in extreme temperatures.
• Power steering fluids: Hydraulic fluids that make the steering wheel work smoothly.
• Auto Batteries – Wet-cell, acid batteries.
• Auto Lamps – Headlights, LED instrument lights.

Many materials and liquids in the cabinet-making industry may be considered hazardous waste including:

• Adhesives: Cabinet glues, epoxy resin adhesives, and urea-formaldehyde adhesives.
• Spent solvents: These include xylene, toluene, and acetone waste. 
• Organic HAP: This includes toluene, xylene, methanol, methyl ethyl ketone, methyl isobutyl ketone, glycol ethers, and formaldehyde.

Many materials and liquids in the printing industry may be considered hazardous waste including:

• Hazardous waste – Waste inks, cleaning solvents, developer and fixer solutions, and other chemicals. Usually, these materials are stored indoors or in a covered area and kept away from drains.
• Solid waste – Empty containers, used film packages, outdated materials, damaged plates, developed film, scrap paper, and damaged products. 
• Wastewater – Fountain solutions, cleanup solvents, photographic chemicals, acids, alkalis, and plate coatings. 
• Air emissions – Volatile organic compounds (VOCs) from the use of cleaning solvents, inks, alcohols, and other wetting agents.
• Other chemicals – Mineral acids and salts, oils and greases, glues, varnishes, resins, and paints

Many materials and liquids in the cosmetic industry may be considered hazardous waste including:

• Parabens – A group of chemicals used to prevent mold and bacteria growth in cosmetics since the 1950s.
• Fragrances – Used to give cosmetics a pleasant smell.
• Pigments and Dyes – The colorant used in liquid and solid products.
• Triclosan – A biocide used as a preservative to prevent bacteria growth and product spoilage.
• Sodium laureth sulfate – An active agent used in cosmetics, personal care, and cleaning products.

Waste products from hospitals and clinics, also known as medical waste, include a variety of items that are potentially infectious and can cause harm to people and the environment:

• Chlorine and chlorine compounds: Hypochlorites are used to disinfect countertops, floors, dental appliances, and more. Bleach can be used to disinfect needles and syringes. However, chlorine is corrosive, so care is needed when using chlorine-releasing agents with metals and plastics.
• Hydrogen peroxide: Used in a variety of formulations, including 7.35% hydrogen peroxide with 0.23% peracetic acid, and 7.5% hydrogen peroxide.
• Peracetic acid: Used in a variety of formulations, including 7.35% hydrogen peroxide with 0.23% peracetic acid, and 1.0% hydrogen peroxide with 0.08% peracetic acid.
• Ortho-phthalaldehyde: Used in a variety of formulations, including 0.55% ortho-phthalaldehyde (OPA).
• Chemical waste – Solvents, reagents, disinfectants, sterilants, and heavy metals. 
• Pharmaceutical waste – Expired or no longer needed pharmaceuticals and items contaminated by pharmaceuticals

Many materials and liquids in the HVAC industry may be considered hazardous waste including:

• Refrigerants: The primary chemical used in HVAC systems, responsible for heat transfer; modern systems primarily use HFCs like R-410a.
• Glycols: Particularly propylene glycol, added to water in closed loop systems to prevent freezing in cold climates.
• Cleaning chemicals: Various solutions used to clean coils, ducts, and other components, including alkaline cleaners, acid-based cleaners, and antimicrobial agents.
• Water treatment chemicals: In cooling towers, chemicals like algaecides and biocides are used to control microbial growth.