The toxicological monographs in this volume summarize the safety and intake data on five food additives (annatto extracts lycopene synthetic and lycopene from Blakeslea trispora and propyl paraben). This volume also contains monographs summarizing toxicological and intake data on four food contaminants (aluminium 1 3-dichloro-2-propanol 3-chloro-1 2-propanediol and methylmercury). This volume and others in the WHO Food Additives Series contain information that is useful to those who produce and use food additives and veterinary drugs and those involved with controlling contaminants in food government and food regulatory officers industrial testing laboratories toxicological laboratories and universities.