Mouth pipetting is forbidden. To avoid false reporting of natural gas leaks, logs of mercaptan use should be kept when mercaptans will be used in a laboratory in such a manner that persons outside of the laboratory could smell the mercaptan and suspect a natural gas leak in the building. Particularly dangerous chemicals , for example, perchloric acid. If perchloric acid is heated above ambient temperature it will give off vapors that can condense and form explosive perchlorates. Hence, when heating perchloric acid above ambient temperature, a perchloric acid hood with a wash down system or a local scrubbing or trapping system should be used.
Gloves are essential when working with hazardous substances.
The proper gloves will prevent skin absorption, infection, or burns. All glove materials are not equally effective in protection from chemical hazards. Consult a chemical resistance chart such as the one found in Appendix 3 or contact the Center for Environmental Health and Safety for assistance in appropriate selection. Gloves must be removed before leaving the laboratory. Eye protection .