5.5 Toxic gases
Corrosive substances or substances which may impede respiration should be obtained in cylinders small enough to be used within a fume hood. Such gas cylinders should be clearly marked with skull and crossbones.
Poison gas may not be stored together with flammable gas.
Cabinets and fume hoods containing toxic gases should be marked with these two signs/pictograms.
Storage rooms containing toxic gases should be marked with these signs/pictograms.