Safety  
 
The relevant hazard warning symbols are listed against the reagents needed for each experiment, e.g. dichlorodimethylsilane, Xi, F. The publishers have done this by providing an additional service to the reader. However, anyone conducting an experiment is obliged to acquaint himself/herself with the hazards associated with the materials employed, to conduct the experiments with due caution and to dispose of all materials properly. The latest hazardous substances regulations (including R, S and E phrases) and the guidelines of the school boards must be observed.