Common Compounds List

The Common Compounds List is a searchable reference of frequently encountered chemical compounds — useful for students, educators, and anyone needing quick chemical data. Search by compound name or molecular formula (e.g., water, H₂O, sodium chloride), then filter by Compound Type (acids, bases, salts, organic, or inorganic) and Molecular Weight Range to see your matching Compounds Found along with the Average Molecular Weight of the results.

Search by compound name, molecular formula, or chemical name

Results

Compounds Found

--

Average Molecular Weight

--

Results Table

Frequently Asked Questions

What is a molecular formula?

A molecular formula shows the exact number and types of atoms in a molecule. For example, H2O represents water with 2 hydrogen atoms and 1 oxygen atom.

How is molecular weight calculated?

Molecular weight is calculated by adding up the atomic weights of all atoms in a compound. It's expressed in grams per mole (g/mol).

What's the difference between organic and inorganic compounds?

Organic compounds contain carbon-hydrogen bonds and are typically derived from living organisms. Inorganic compounds usually don't contain carbon-hydrogen bonds.

Why are some compounds known by common names?

Some compounds have been known for so long that their common names are more widely used than systematic names. Examples include water (H2O), ammonia (NH3), and methane (CH4).

How do I search for a specific compound?

You can search by the compound's common name, systematic name, or molecular formula. The search is case-insensitive and will match partial names.

What are acids, bases, and salts?

Acids release hydrogen ions in solution, bases release hydroxide ions or accept hydrogen ions, and salts are ionic compounds formed from acid-base reactions.

Are all chemical formulas the same as molecular formulas?

No, molecular formulas show the exact number of atoms, while empirical formulas show the simplest ratio. Structural formulas show how atoms are connected.

More Chemistry Tools