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PubChem
Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers.
Substance (chemistry) - Wikipedia
In chemistry, a substance is a unique form of matter with constant chemical composition and characteristic properties. [1][2] Chemical substances may take the form of a single element or chemical compounds.
CHEMICAL Definition & Meaning - Merriam-Webster
The meaning of CHEMICAL is of, relating to, used in, or produced by chemistry or the phenomena of chemistry. How to use chemical in a sentence.
Chemicals, Pesticides and Toxics Topics | US EPA
Managing Chemical Risks Radiation Protection Safer Chemicals in Cleaning Products Safer Chemicals Research Databases: Search by Chemical ChemView CompTox Chemicals Dashboard Integrated Risk Information System (IRIS) Pesticide Chemical Search Substance Registry Service (SRS) TSCA Chemical Substance Inventory Pest Management Integrated Pest ...
What Is a Chemical? Definition and Examples
A chemical is any substance with a definite composition and distinct properties. All matter is made of chemicals, regardless of whether it is natural or synthetic.
CHEMICAL | English meaning - Cambridge Dictionary
CHEMICAL definition: 1. any basic substance that is used in or produced by a reaction involving changes to atoms or…. Learn more.
What Is and Is Not a Chemical? - ThoughtCo
A chemical is any substance that is made of matter, like solids, liquids, or gases. Light, heat, and sound are not chemicals since they are not made of matter. Chemicals can be both natural, like oxygen, or artificial, like stainless steel.
What is a Chemical ? | Nuclear Regulatory Commission - NRC
Chemical changes are different from physical changes, which don't result in a change in substances. One example of a physical change is when water freezes into ice.
Chemical - definition of chemical by The Free Dictionary
Relating to or produced by means of chemistry: a chemical discovery; a chemical change.
CHEMICAL Definition & Meaning | Dictionary.com
CHEMICAL definition: a substance produced by or used in a chemical process. See examples of chemical used in a sentence.
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