INTRODUCTION General ?C Liquid propellant fuels and oxidizers are@ in general@ highly reactive chemicals. Consequently@ the propellants and their reaction products possess certain hazardous properties which must be fully understood by all who are required to handle them. This manual is intended as a guide to help establish rules as needed to fit actual cases. The fitting of details into this framework must be left to personnel assigned to specific operations. Accordingly@ information on the properties of these materials is given so that hazards will be recognized and understood. Personnel training and Supervision ?C All operating personnel shall be taught the nature of propellants and the general principles of safe conduct in handling@ storage@ and use of such materials. Propellants described here can be handled safely when certain simple basic principles are known and followed faithfully. On the other hand@ ignorance or carelessness can result in permanent injury or death. Each person engaged in this work should be taught procedures of self-aid and first-aid@ which if applied promptly afford a substantial measure of protection against injury in the event of accident.