- PubChem
Search chemicals by name, molecular formula, structure, and other identifiers Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more
- What Is a Chemical? Definition and Examples
For example, pesticides in water or artificial colorings in food are “chemicals ” But, chemistry sees chemicals somewhat differently A chemical is a substance with a specific composition It is an element, an alloy, or a compound made up of two or more elements combined in a fixed ratio
- Substance (chemistry) - Wikipedia
Chemical substances can exist in several different physical states or phases (e g solids, liquids, gases, or plasma) without changing their chemical composition Substances transition between these phases of matter in response to changes in temperature or pressure
- Chemicals, Pesticides and Toxics Topics | US EPA
Learn how to safely handle chemicals, the effects of certain toxins, which substances are controlled or managed, and safer alternatives
- Chemistry | Definition, Topics, Types, History, Facts | Britannica
chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes
- 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 While ice may have different physical properties, it is still just water Another example is when you dissolve salt into a cup of water
- 12 Types of Chemicals Explained | Uses, Examples Safety Tips
Learn about 12 types of chemicals with examples, uses, and safety tips Explore acids, bases, polymers, pharmaceuticals, and more in everyday life
- 10 Types Of Chemicals and How to Manage Them
Chemicals are the backbone of countless industries—from manufacturing and agriculture to healthcare and research However, with their widespread use comes the inevitable risk of chemical hazards that can seriously affect human health and the environment
|