Bis-GMA (CAS 1565-94-2): storage and disposal

The thing that sets this one apart from a thin liquid is how slowly it moves. A thick resin clings to bottle threads and drips from the lip, so keep each container upright in a small tray that catches runs. Light-activated dental resins should be kept away from the curing lamp and from strong daylight, so a drawer or closed cupboard is better than a windowsill. Keep it apart from adhesives, etchants and cements with similar bottles, because the labels are often small. Because it may cause an allergic skin reaction, anyone wiping a sticky bottle should use appropriate gloves. Record the date of receipt on the container, and keep the surgery stock list up to date.

A thick, clear to pale resin that still moves slowly is normal for this component. What does not look right is a bottle in which the resin has set, formed a skin or hard lumps, or become stiff and cloudy where it was clear. Sticky residue round the cap, a cap that has set fast to the neck, resin smeared on the outside and a label stuck down by drips are the usual visible clues in a surgery. A bottle that has become warm to the touch, or has changed shape, should not be opened. No other change is described for this substance, so use the label date and the container to judge.

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 We do not publish a drain or general waste route for any chemical.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.

Avoid trying to empty a bottle of thick resin to make it easier to pack. What matters is what it is and how it looks: say it is a dental resin component, note whether the contents are still liquid or have set, and give the size of the container. Surgeries with 18 01 06* in the code list for a human healthcare setting should confirm that against the product label, while a general lab entry is 16 05 06*. Do not scrape resin out, cure it under a lamp, or put it in clinical waste or the general bin. A registered carrier packs it with compatible organic items.

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.