Epsom Salt (Magnesium Sulfate)
Bath Salt
Mineral salt for making bath salts and bath products.
TECHNICAL DATA
INCI Magnesium Sulfate
No. CAS 10034-99-8
Relaxing bath salts 5 – 30 %
Body scrubs 10 – 50 %
Face or body masks 1 – 5 %
Shampoos / hair treatments 0.5 – 2 %
Body creams and lotions 0.5 – 3 %
Appearance Crystals or crystalline powder
Color White
Odor Odorless
Solubility Soluble in water, insoluble in alcohol
Solution appearance Clear and colorless (in water)
Melting / decomposition point ~112 °C (loses water of crystallization)
Purity ≥ 99 % (cosmetic/pharmaceutical grade)
Water of crystallization 51 % (7 molecules of H₂O, heptahydrate)
Moisture being hygroscopic, it can absorb water and cake.
FUNCTION
Widely used in cosmetics for its relaxing,Scrubssoothing and mineralizing propertiesInorganic compound
APPLICATIONS
Bath saltsBath bombsScrubsFoot care products
Relaxing bath salts. Body scrubs combined with plant oils. Spa treatments and aromatherapy. Hair formulations that help comfort the scalp. Body creams and lotions with a revitalizing feel.
DESCRIPTION
Technical data sheet
Epsom Salt
Epsom salt is the common form of magnesium sulfate heptahydrate, a natural mineral composed of magnesium, sulfur and oxygen. It comes as white, odorless, water-soluble crystals
Practical formulation guide
Usage level: Recommended usage level
How to use and incorporate: Mix with plant oils for body scrubs (2 parts salt to 1 part oil) or with baking soda, citric acid and fragrance for bath salts and bath bombs.
Formulation tips:
- Clays and powders absorb water and oil: adjust the proportion of liquids in the formula.
- In water-based products, the powder adds microbial load: use a preservative.
- Before scaling up, make a pilot batch and run a stability test (cycles at 4 / 25 / 45 °C/39 / 77 / 113 °F for 4 weeks, checking odor, color, pH, viscosity and separation) in the final packaging.
Compatibility: Incompatibilities
Strong acids: release sulfuric acid.
Strong bases: may precipitate magnesium hydroxide.
Calcium or barium salts: form insoluble precipitates (sulfates).
Strong oxidizing agents: risk of decomposition.
Storage: Packed in sacks or sealed bags. Store in a cool, dry, ventilated place. Protect from moisture and heat sources.
Precautions: Generally safe in cosmetic use. Avoid contact with eyes and mucous membranes at high concentrations. Keep out of reach of children. Handling: Store in an airtight container in a cool, dry place. Protect from ambient humidity. Avoid prolonged exposure to temperatures > 40 °C/104 °F to prevent loss of water of crystallization. Wear gloves and safety glasses when handling large amounts of powder.
Technical information for formulators: This sheet describes industrial uses of the raw material in the development of cosmetic products. It is not an efficacy claim for any finished product. The person responsible for the formulation must validate the concentration, compatibility and claims of their product in accordance with applicable regulations.
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