INCI Name
Magnesium Sulfate
Botanical Name
None
Inorganic mineral salt used in cosmetics mainly as a bulking and viscosity-controlling agent, and in bath products. CIR concludes it is safe in current practices of use (up to 11% leave-on; 25% rinse-off). Often used in bath soaks and scrubs; keep usage appropriate to product type.
Bulking agent; viscosity-controlling; emulsion stabilizer (W/O); bath additive; physical exfoliant for scrubs
Product Type(s):
Typical Usage Range:
Leave-on: 0.1–11% (per CIR reported max use); Rinse-off: up to 25%; Bath soaks: typically 50–100% of formula (product-type dependent).
Softens bath water; helps product texture and spread; traditional use in bath soaks; may support gentle physical exfoliation in rinse-off scrubs (cosmetic context)
Primary Components:
Magnesium sulfate (typically heptahydrate, MgSO₄·7H₂O)
External use only; avoid on broken/irritated skin; may be drying or stinging at higher concentrations; keep out of eyes; discontinue if irritation occurs
Preferred Extraction Method:
Mined/processed mineral salt (natural epsomite deposits or neutralization of magnesium compounds with sulfuric acid)
Prefer USP/BP/FCC grade; verify heptahydrate crystals; check particle size for scrubs; request CoA (heavy metals, purity); avoid added fragrance/colorants
Explore additional safety and regulatory data from trusted external sources:
*The ingredient details on this page are intended for general educational use and should not be considered exhaustive. Additional properties, uses, or safety considerations may be available from other sources. Root & Ritual Apothecary is not affiliated with Cosmetics Info, Cosmetic Ingredient Review (CIR), INCIDecoder, SkinSafe, EWG Skin Deep, or SpecialChem. External links are provided solely for informational purposes; Root & Ritual does not control or guarantee the accuracy, methodology, or conclusions of third-party sources, including consumer rating systems such as EWG.
Epsom Salt
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