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557-04-0

Basic Information
CAS No.: 557-04-0
Name: Octadecanoicacid, magnesium salt (2:1)
Article Data: 80
Cas Database
Molecular Structure:
Molecular Structure of 557-04-0 (Octadecanoicacid, magnesium salt (2:1))
Formula: 2(C18H35O2).Mg
Molecular Weight: 591.254
Synonyms: Magnesiumstearate (7CI);Octadecanoic acid, magnesium salt (9CI);Stearic acid,magnesium salt (8CI);Daiwax M;Daiwax SMO;Dibasic magnesium stearate;EM 100;EM 100 (salt);EM 112;EM 144;EM 612;Electol MM 2;HyQual;Magnesiumdistearate;Magnesium octadecanoate;Magnesium stearic acid;Mg-St;NP 1500;NS-M;NS-M (salt);Nissan Electol MM 2;Petrac MG 20NF;Pharma;SM 1000;SM-P;Synpro 90;Synpro Magnesium Stearate 90;Magnesium stearate;
EINECS: 209-150-3
Density: 1.028 g/cm3
Melting Point: 200 °C(lit.)
Boiling Point: 359.4 °C at 760 mmHg
Flash Point: 162.4 °C
Solubility: Insoluble in water
Appearance: White powder
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 26-37/39
Transport Information: N/A
PSA: 52.60000
LogP: 12.50830
Raw Materials
69-65-8
Downstream Products
39133-31-8
5638-76-6
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  • Magnesium Stearate

  • Casno:

    557-04-0

    Magnesium Stearate

    Min.Order: 200 Kilogram

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    China (Mainland)  |  Contact Details

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  • Magnesium stearate CAS 557-04-0 magnesium distearate

  • Casno:

    557-04-0

    Magnesium stearate CAS 557-04-0 magnesium distearate

    Min.Order: 1 Kilogram

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  • Magnesium Stearate CAS NO.557-04-0

  • Casno:

    557-04-0

    Magnesium Stearate CAS NO.557-04-0

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Consensus Reports

Reported in EPA TSCA Inventory.

Standards and Recommendations

ACGIH TLV: TWA 10 mg/m3
DOT Classification:  4.2; Label: Spontaneously Combustible

Specification

The IUPAC name of Magnesium stearate is magnesium octadecanoate. With the CAS registry number 557-04-0, it is also named as Octadecanoic acid, magnesium salt. The product's category is Cosmetic Ingredients & Chemicals. It is white powder which is soluble in hot ethanol solution and insoluble in water. In addition, this chemical has good skin adhesion and lubricity. Besides, it should be sealed in the container and stored in the cool and dry place.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 8.22; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 7.42; (4)ACD/LogD (pH 7.4): 5.63; (5)#H bond acceptors: 2; (6)#H bond donors: 1; (7)#Freely Rotating Bonds: 16; (8)Flash Point: 162.4 °C; (9)Enthalpy of Vaporization: 63.84 kJ/mol; (10)Boiling Point: 359.4 °C at 760 mmHg; (11)Vapour Pressure: 8.58E-06 mmHg at 25°C; (12)Rotatable Bond Count: 30; (13)Exact Mass: 590.512453; (14)MonoIsotopic Mass: 590.512453; (15)Topological Polar Surface Area: 80.3; (16)Heavy Atom Count: 41; (17)Complexity: 196.

Preparation of Magnesium stearate: It can be obtained by magnesium sulfate and sodium stearate which is prepared by sodium hydroxide and stearic acid.
C17H35COOH+NaOH→C17H35COONa+H2O
2C17H35COONa+MgSO4→Mg[CH3(CH2)16COO)]2+Na2SO4 

Uses of Magnesium stearate: It often used as a diluent in the manufacture of medical tablets, capsules and powders. It is not only used to bind sugar in hard candies, but also used as a heat stabilizer of PVC, lubricating agent of ABS, amino resins, phenolic resins and urea formaldehyde resin. In addition, it is a common ingredient in baby formulas. Besides, tis chemical can used in the powder products to enhance adhesion and lubrication.

When you are using this chemical, please be cautious about it as the following:
It is irritating to eyes, respiratory system and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable gloves and eye/face protection.

People can use the following data to convert to the molecule structure. 
1. SMILES:[Mg+2].[O-]C(=O)CCCCCCCCCCCCCCCCC.[O-]C(=O)CCCCCCCCCCCCCCCCC
2. InChI:InChI=1/2C18H36O2.Mg/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2*2-17H2,1H3,(H,19,20);/q;;+2/p-2