This is the case with the conversion of diamond to lower energy graphite at atmospheric pressure, in such a reaction diamond is considered metastable and will not be observed converting into graphite.
Related Words for chemical synthetic , actinic , alchemical , enzymatic , synthetical. Life or Just Gas? Francis December 17, Francis December 14, Sewers Wudan Yan November 29, Historical Examples of chemical The air was saturated by it just as water may hold a chemical in solution.
Heroes of the Telegraph J. City of Endless Night Milo Hastings. Its True Genesis R. Of or relating to chemistry. Of or relating to the properties or actions of chemicals. A substance with a distinct molecular composition that is produced by or used in a chemical process. A drug, especially an illicit or addictive one. Do not rely on just any random web site; look for authoritative resources by established governmental, academic, and public service agencies.
If you encounter a new chemical at your job, read the SDS. And if you have no information about a new chemical, then it's right to treat it with suspicion until you know otherwise. It's a sad fact that only a few hundred of the tens of thousands of chemicals in commercial use today have been thoroughly evaluated for their effects on human health and the environment. Keep your exposure as low as reasonably achievable in all cases.
Chemical manufacturers in the US and other "developed" nations have come a long way in the past century. Thanks to stricter regulation as well as consumer pressure, chemical manufacturers are working on developing "green" chemistry that produces less or no waste, have reduced the amount of waste they discharge to the environment, and have found replacements for hazardous processes.
While there are always a few rogue operations out there, the American Chemistry Council 's Responsible Care program has proven quite effective. Of course, there is always room for improvement and citizens need to keep a watchful eye on companies that are more interested in a quick profit than a sustainable environment. Safety Data Sheets are only required for hazardous chemicals. As noted above, the OSHA definition of "chemical" is much broader than the common definition.
However, certain items are exempted from coverage under the Hazard Communication Standard, particularly items that are classified as articles. Recognize that virtually any chemical substance has inherent hazards that can cause harm under the right conditions.
Water can drown you, pure oxygen can cause deadly fires, and consuming an entire bottle of whiskey in one minute will cause fatal poisoning. The key is to know the potential hazards and precautions of each substance you deal with in the workplace. Read and understand the content of your SDS's. If you are unsure of the hazards and what you can do to avoid them after reading the SDS do not proceed until someone has fully explained these to you.
Always use engineering controls and proper PPE to reduce workplace exposures. Always remember that the best way to avoid exposure to toxic or hazardous substances is to eliminate them from your workplace.
Look for alternative methods to using such materials and processes. Additional definitions from Google and OneLook. Sunday, February 18, This page is copyright by ILPI. Unauthorized duplication or posting on other web sites is expressly prohibited.
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The formation of products that are different from reactants is the difference between a chemical change and a physical change of matter. In a chemical change, the formulas of at least one of the reactants and products are different. chemical potential n a thermodynamic function of a substance in a system that is the partial differential of the Gibbs function of the system with respect to the number of moles of the substance., (Symbol) μ. Products are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants.