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  1. PubChem

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

  2. CHEMICAL Definition & Meaning - Merriam-Webster

    5 days ago · 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.

  3. What Is a Chemical? Definition and Examples - Science Notes and …

    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.

  4. Chemistry | Definition, Topics, Types, History, & Facts | Britannica

    May 22, 2026 · Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization. Today, vinyl, Teflon, liquid crystals, semiconductors, and …

  5. 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.

  6. 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 …

  7. 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.

  8. 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.

  9. Chemical - definition of chemical by The Free Dictionary

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

  10. What Is and Is Not a Chemical? - ThoughtCo

    Dec 7, 2019 · 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 …