Physical hazards, molecular design

Hazard is a broad term defined as the ability of a substance to result in consequences that are adverse to human health and the environment and encompasses several subcategories (Table I). The first time students enter a laboratory they are cautioned about physical hazards such as flammability, explosivity, and corrosivity. Physical hazards can be defined as events that cause injury or significant disruption at a well defined, localized level. A discussion of how these physical hazards are derived from their molecular structure is an important component in making students aware that they can influence the potential for ha5 rd as they design new molecules. 

Green Chemistry, defined as the design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances (5), has been referred to as pollution prevention at the molecular level. This emerging area recognizes fiiat during the design phase of any chemical synthesis, product, or process, minimized hazard must be viewed as a performance criterion. Moreover, hazard must also be viewed as a physical/chemical property that is possible to manipulate and control at die molecular level. 

Chemical Designations — Synonyms Acrylic Amide 50%, Propenamide 50% Chemical Formula CH2=CHCONH2—H2O. Observable Characteristics — Physical State (as normally shipped) Liquid Color Clear Odor None. Physical and Chemical Properties — Physical State at 15 C and 1 atm. Liquid Molecular Weight 71 (solute only) Boiling Point at 1 atm. Data not available (Vapor Pressure 0.033 atm at 125°C Freezing Point 183, 84, 357 Critical Temperature Not pertinent Critical Pressure Not pertinent Specific Gravity 1.05 at 25°C Vapor (Gas) Density Not pertinent Ratio of Specific Heats of Vapor (Gas) Not pertinent Latent Heat of Vaporization Not pertinent Heat of Combustion Not pertinent Heat of Decomposition Not pertinent. Health Hazards Information — Recommended Personal Protective Equipment Safety glasses with side shields ... 

---