Writing chemical formulas and unitsLast Updated: June 30, 2020
You can use our "ChemText" technology to easily write units, chemical formulas and reactions. ChemText is available for labels and arrows.
To enable it, select an arrow or a label and toggle the "Smart detection of units and chemical formulas" in the ChemText section
You can now write chemical formulas. You can write
- compounds, e.g. "H2SO4":
- ions, e.g. "Na+":
- ions with multiple atoms and charges can be written too, e.g. "SO42-"
- Reaction arrows can be written like this: "A <- B", "C -> D", "E <-> F"
- Units can be written like this, e.g. "30cm3"
- You can combine all of the above to write e.g. "30 cm3 of H2O":
- Hydration dot is typed with ".", without gaps: e.g. "CuSO4.5H2O"
- Temperature units are typed using "oC" and "oF" immediately after a number. In other contexts, use "degC" and "degF" with a space at the front. E.g. "20oC = 68oF":
If you find issues with how your text is interpreted, please report them to firstname.lastname@example.org, sending:
- The text you've typed
- A screenshot of how it was rendered.
- A description of what you expected to happen