Chemical directory
Elemental Substances: Formulas & CAS Numbers
Records linked to this chemical family through ChEBI ontology ancestry. Membership can overlap across families.
What belongs to this chemical family?
Elemental substances contain one chemical element, including molecular forms such as S8. Several atoms in one molecule do not necessarily make a multi-element compound. See the linked ChEBI definition for the classification scope.
Examples on this page: Argon(0), Chloride, Copper(2+).
| Substance | CAS number | |
|---|---|---|
| Argon(0) Element | 7440-37-1 | |
| Chloride Organic/Inorganic Small Molecule | 16887-00-6 | |
| Copper(2+) Organic/Inorganic Small Molecule | 15158-11-9 | |
| Cyclooctasulfur Element | 10544-50-0 | |
| Dibromine Element | 7726-95-6 | |
| Dichlorine Element | 7782-50-5 | |
| Dihydrogen Element | 1333-74-0 | |
| Diiodine Element | 7553-56-2 | |
| Dinitrogen Element | 7727-37-9 | |
| Dioxygen Element | 7782-44-7 | |
| Graphite Element | 7782-42-5 | |
| Manganese(2+) Organic/Inorganic Small Molecule | 16397-91-4 | |
| Nickel(2+) Organic/Inorganic Small Molecule | 14701-22-5 | |
| Nickel(3+) Organic/Inorganic Small Molecule | 22541-64-6 | |
| Ozone Element | 10028-15-6 | |
| Polysulfur Element | 7704-34-9 | |
| Potassium(1+) Organic/Inorganic Small Molecule | 24203-36-9 | |
| Samarium(3+) Organic/Inorganic Small Molecule | 22541-17-9 | |
| Sodium(1+) Organic/Inorganic Small Molecule | 17341-25-2 | |
| Xenon(0) Element | 7440-63-3 |