Conservation laboratories contain a myriad of old and materials, some of which date back to antiquity, and some that are new and ever-changing. For example, solvents can be used to clean artifacts; acids may be used to remove decades of corrosion and tarnish, while leaving a delicate patina below; fumigants and pesticides are used to kill insects and other organisms infesting collections. Al present the conservator with unique occupational health and safety hazards. This data sheet discusses safe storage and disposal of laboratory chemicals, and offers a suggested storage and disposal program for your laboratory.