Fast green FCF (CAS 2353-45-9): storage and disposal

One practical check at the shelf is to see whether powder has settled in the thread of the cap, because dust of this dye irritates the airways and a gritty thread throws it into the air at every opening. If powder has accumulated in the thread, do not disturb it. Record the condition and keep the jar closed in a dry, labelled store with its date of receipt. Storage class is general, so no cabinet is required, but keep it low and in a tray with the other stains. In school stores it often sits near plant practical supplies, where it can be confused with other green colourants, so mark the jar clearly.

Check first for powder where it should not be: a green dusting around the cap, on the shelf or on neighbouring jars. A normal jar holds dry, free flowing powder behind a clean closure. Lumps, a damp or tacky look and a hard cake mean moisture has entered, and a green crust in the thread means the lid has been closing on powder. The dye gives few other visible signs of age that anyone should rely on, so the paperwork is the evidence: unreadable label, no date of receipt, a cracked jar. A jar that cannot be identified is listed as unknown and left closed.

By specialist collection only. It never goes down the drain or into general waste. It is normally packed in a non-regulated or low hazard laboratory pack with compatible chemicals.

A school, college or university store describes this dye under 16 05 06*, and human healthcare clearing under 18 01 06*, so begin by naming the setting. Because it is harmful to aquatic life with long lasting effects, emptying a jar down a sink is never acceptable, and neither is putting powder into the general waste or trying to treat a spill before collection. Say that it is powder, give the jar size and mention any dust on the outside of the jar. Leave it sealed and upright, with other dry stains it can be packed with in a lab pack.

Usually held as: solid.

Part-used bottles and full containers are both fine. Tell us the size and how many, and an estimate is enough for a first price.