INCI names / Epsom salt
Epsom salt INCI name
The INCI name for epsom salt is Magnesium Sulfate. A lotion, balm or bath product lists it by that name. In cold-process soap it reacts with the lye (it forms magnesium hydroxide and a sulfate salt), so the tools list it as added and flag it for you to check.
| In lotions, balms and other cosmetics | Magnesium Sulfate |
|---|---|
| In cold-process soap | It reacts with the lye (it forms magnesium hydroxide and a sulfate salt). The tools list it as added, "Magnesium Sulfate", following Article 19(1)(g) of the Cosmetics Regulation ("at the time they are added"), and flag it for you to check. To name what the bar holds instead, add inci: with that name to the line. |
| On a US label | Magnesium Sulfate |
| In Great Britain and Northern Ireland | The same name as the EU. Northern Ireland uses the EU glossary cited below; Great Britain still uses the glossary it kept from the EU, where the name has another entry number. |
| What it is used for (CosIng) | bulking |
| Also entered as | epsom salts, magnesium sulfate, magnesium sulphate |
Glossary citation: Magnesium Sulfate #15818 (Commission Implementing Decision (EU) 2025/1175 on EUR-Lex).
In the soap or skincare tool, put it on its own line with its weight, for example "epsom salt, 5", and the tool prints the name for the region you choose.
Transcribed from the EU glossary of common ingredient names (Implementing Decision (EU) 2025/1175) and checked against it; the US names are the ones FDA's substance registry (GSRS) records, and the uses are those CosIng, the Commission's cosmetic ingredient database, lists. A labelling reference.