Chemical reactions usually involve the making or breaking of chemical bonds. Oxidation, reduction, dissociation, acid–base neutralization and molecular rearrangement are some …

Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers.

CHEMICAL definition: 1. any basic substance that is used in or produced by a reaction involving changes to atoms or…. Learn more.

Oct 15, 2023 · 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.

Feb 3, 2026 · Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization. Today, vinyl, Teflon, liquid crystals, …

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.

CHEMICAL definition: a substance produced by or used in a chemical process. See examples of chemical used in a sentence.

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.

Relating to or produced by means of chemistry: a chemical discovery; a chemical change.

The NIOSH Pocket Guide to Chemical Hazards (NPG) informs workers, employers, and occupational health professionals about workplace chemicals and their hazards. The NPG …