Triethylene glycol dimethacrylate (CAS 109-16-0): storage and disposal

Keep each component bottle separate from the thick resins and bonding agents it is mixed with, so a surgery does not end up with half-labelled pots of unknown liquid. Store it in a closed cupboard, away from the curing lamp, daylight and sources of heat, upright in a small tray, with the date of receipt on the label. Because the only classification is skin sensitisation, the habit that counts is careful handling of drips and wiped bottles, and keeping suitable gloves in the cupboard, because methacrylate monomers can pass through thin disposable gloves. Decanted or syringed amounts should carry the name, not an abbreviation that only one dental nurse understands.

A thin, clear, colourless liquid is normal, and it moves freely, much like a light oil. As a methacrylate it can begin to set, so thickening, a hazy look, specks, or a rubbery plug in the neck are the visible signs of a bottle on the way out. Resin-like residue on the dropper or cap, and a cap that sticks, say the same thing. A bottle that has changed shape, feels warm or has set solid should not be opened. Faded labels and a missing date are the other checks, and a bottle that has lost its date is best listed for collection.

We arrange this by specialist collection. We do not publish a drain or general waste route for any chemical. It is normally packed in a general laboratory pack with compatible chemicals.

Leaving the surgery, it travels as a described organic liquid, so list the bottle by its printed name, the volume left and whether it has thickened. A dental surgery in a human healthcare setting normally uses 18 01 06*, and the general entry is 16 05 06*. The paperwork follows the hazardous route. Unwanted monomer is not allowed to set in the bottle on purpose, washed into a sink, put in a clinical sharps container or added to general waste. It is collected by a registered carrier and packed with other compatible organic liquids in sealed UN approved packaging.

Usually held as: dental resin component.

Tell us the container size and how many you hold. An estimate is enough to start with, and some items cannot be priced until someone has looked at them.