Background information is provided on the registered trademark "TLV" (Threshold Limit Value), the term used to express tolerable concentrations. The TLV of a compound is an estimate extrapolated from some defined damage to humans or animals at higher concentrations or by drawing analogies between similar concentrations. (JN)

Discusses the relative instability of organic oxidants, citing early attempts at overcoming the solubility limitations in organic reaction systems. Describes the more recent introduction of new types of organic oxidant salts that have demonstrated more promising levels of stability, though unexpected explosions have still occurred. (TW)

Presents a scenario related to the disposal of potentially dangerous ether. Several suggestions for dealing with peroxide-forming compounds are included. (JN)

Procedures for recovering silver and cobalt from laboratory wastes (including those resulting from student experiments) are presented. The procedures are generally applicable since only common, inexpensive laboratory reagents are needed. (JN)

Presents a model, ChemSafe, that was developed to address and solve the allied problems of chemical purchase, storage, use, and disposal in schools. (ZWH)

This is the fourth in a series of articles concerned with safety in school science. This article presents some facts about eight types of carcinogenic chemicals and suggests precautions in their use in British schools. A safety bibliography is also included. (HM)

Chemical demonstrations can and do enhance an otherwise potentially dull subjects--the properties of hazardous materials. This book contains the recipes for presenting several chemical demonstrations. Demonstrations are designed to be relatively easy to perform and present minimal hazards if done properly. The book contains an introduction, safety…

The purpose of this document is to identify potentially hazardous substances that may be in use in many school laboratories and to provide an inventory of these substances so that science teachers may take the initiative in providing for the proper storage, handling, use, and if warranted, removal of hazardous materials. The document consists of…

Described is a simple test tube method developed lead analysis of samples of roadside soil. The relationship between the results and the traffic flow indicate car exhausts are the major source of lead pollution. Materials and procedures are detailed. An example of results is provided. (Author/CW)

Discussed are accidents that occur in the laboratories of highly trained chemists. Four examples are provided to illustrate potential hazards that are often overlooked in chemistry laboratories, molten inorganic salt baths, the reaction of acetone and hydrogen peroxide, halogenated acetylene compounds, and the reaction of hydrogen peroxide and…

Guidelines are offered to research administrators for reducing the volume of hazardous laboratory waste. Suggestions include a chemical location inventory, a chemical reuse facility, progressive contracts with chemical suppliers, internal or external chemical recycling mechanisms, a "chemical conservation" campaign, and laboratory fees for…

Provides real life assignments that can be used to help students apply chemistry laboratory techniques to solve environmental hazardous waste problems. Numerous diagrams are provided to aid in describing the experiments performed. (ZWH)

Describes procedures for disposing of dichromate cleaning solution, picric acid, organic azides, oxalic acid, chemical spills, and hydroperoxides in ethers and alkenes. These methods have been tested under laboratory conditions and are specific for individual chemicals rather than for groups of chemicals. (JN)

Highlights guidelines that should be implemented in administering a plan for the proper storage of chemicals. They include housing chemicals in multiple locations within a building to lessen the accident potential, not grouping them in alphabetical order, and storing them according to six major chemical classes. (JN)

Presented is an experiment in which students recover almost 90 percent of the original lead chloride thus saving on costs of chemicals and disposal. Included are experimental procedures and a discussion of typical results. (CW)