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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. Chemistry - Wikipedia

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

  3. What Is a Chemical? Definition and Examples

    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. ChemicalBook

    Here you can get chemical information (such as chemical physical properties, safety data, Excellent china suppliers and their web addresses and etc.)by searching the name, CAS number, molecular …

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

    Apr 29, 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 …

  6. 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.

  7. 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.

  8. Periodic Table - Ptable - Properties

    Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.

  9. 12 Types of Chemicals Explained | Uses, Examples & Safety Tips

    Aug 28, 2025 · Learn about 12 types of chemicals with examples, uses, and safety tips. Explore acids, bases, polymers, pharmaceuticals, and more in everyday life.