Magnesium stearate

CAS NO.

557-04-0

EINECS NO.

209-150-3

FORMULA

Mg(C₁₇H₃₅CO₂)₂

MOL WT. 591.25

SYNONYMS

Octadecanoic Acid, Magnesium Salt;

Magnesium Distearate; Dibasic Magnesium Stearate; Magnesiumdistearat (German); Diestearato de magnesio (Spanish); Distéarate de magnésium (French);

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

Fine white to yellow-white powder

MELTING POINT

150 C

SPECIFIC GRAVITY

1.03

SOLUBILITY IN WATER

Insoluble

NFPA RATINGS

Health: 1; Flammability: 0; Reactivity: 0

APPLICATIONS

Gelling Agent, Stabilizer, Lubricant, Anti-sticking Agent, Sanding Agent, Emulsifier And Plasticizer for Polymer, Paper Pharmaceutical, Rubber, Cosmetic, Paint and Food Industries.

SALES SPECIFICATION (VEG. GRADE)

BIBLIOGRAPHY

USP 23/ NF 18

APPEARANCE

White powder

IDENTIFICATION

Pass Test

Mg CONTENT

4 - 5%

STEARIC ACID

40% min

HEAVY METALS

20ppm max

LEAD

10ppm max

CHLORIDES

0.1% max

ACIDITY & ALKALINITY

Pass Test

SULPHATES

0.25% max

FREE FATTY ACID

0.5% max

ASH (as MgO)

7.5% max

TOTAL MICROBIAL COUNT

1,000/g max

SALMONELLA

Negative

TOTAL MOLDS AND YEASTS

500/g max

E. COLI

Negative

LOSS ON DRYING

4.0% max

MELTING POINT

150 C

SIEVE ANALYSIS

99.8% Through 200 mesh

TRANSPORTATION

PACKING

20kgs in Bag

GENERAL DESCRIPTION OF METALLIC SALTS OF FATTY ACIDS

Metallic salts of fatty acids are used as stabilizer and plasticizer in plastic industry as well as in cosmetics. They are used as flatting and sanding agents in lacquers, coatings & inks. They can be applied in tablet manufacturing. They are used as drying lubricants and dusting agents for rubbers. They are used as catalysts in chemical synthesis and emulsifiers for emulsion polymerization of synthetic rubber and resin which can be approved for use in food contact applications. They are used as waterproofing additives and ointments.