Exits, aisles and safety equipment must NOT be obstructed in any way with equipment, furniture, or other items. Work areas and floors are not to be used for excessive storage. Doors which are not in use but which are accessible from a corridor or adjacent room should be appropriately labeled if they are blocked on the interior of the room. Hallways are not to be used as storage areas. Mouth pipetting .
Mouth pipetting or siphoning is forbidden.
Top of page Perchloric acid . If perchloric acid is heated above ambient temperature it may evaporate and condense on ductwork in the form of explosive perchlorates. Therefore, when heating perchloric acid above ambient temperature, a perchloric acid fume hood with a water wash down system or a local scrubbing or trapping system must be used. All personnel must wear PPE appropriate for the hazardous chemicals used in the laboratory. Laboratories where hazardous materials or operations are present must provide an emergency contact card, updated at least annually.