The report is a technical guide for the safe warehousing of hazardous materials. The purpose of the document is to introduce practical guidelines for the safe storage and warehousing of hazardous materials. It is designed to be used world wide and to meet requirements of developing as well as developed countries. The topics presented include (1) key responsibilities of authorities, suppliers, or owners of the stored materials, and the 'warehouse keeper'; (2) the legal framework; (3) an explanation and description of Material Safety Data Sheets (MSDS) and the classification and labelling of chemicals; (4) storage location; (5) warehouse management; (6) fire and environmental protection; and (7) a proposed checklist for regular review of safety and security conditions.