Sodium Stearate Pure & BP Ph Eur USP NF Grade Suppliers, Exporters CAS 822-16-2 |
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MSDS of Sodium Stearate BP Ph Eur USP NF Manufacturers
Sodium Stearate
Pure
Also IP BP Ph Eur USP-NF Reagent FCC Food Grades
Specifications of Sodium Stearate BP Ph Eur
Action and use
Excipient
DEFINITION
Mixture of sodium salts of different fatty acids consisting mainly of stearic (octadecanoic) acid [C17H35COONa] and palmitic (hexadecanoic) acid [C15H31COONa].
Content:
sodium: 7.4 per cent to 8.5 per cent (dried substance);
stearic acid in the fatty acid fraction: minimum 40 per cent;
sum of stearic acid and palmitic acid in the fatty acid fraction: minimum 90 per cent.
CHARACTERS
Appearance
White or yellowish, fine powder, greasy to the touch.
Solubility
Slightly soluble in water and in ethanol (96 per cent).
IDENTIFICATION
First identification C, D.
Second identification A, B, D.
A. Freezing point Minimum 53°C for the residue obtained in the preparation of solution S (see Tests).
B. Acid value 195 to 210, determined on 0.200 g of the residue obtained in the preparation of solution S dissolved in 25 ml of the prescribed mixture of solvents.
C. Examine the chromatograms obtained in the assay of stearic acid and palmitic acid.
Results The 2 principal peaks in the chromatogram obtained with the test solution are similar in retention time and size to the 2 principal peaks in the chromatogram obtained with the reference solution.
D. Solution S gives reaction of sodium.
TESTS
Meets all the tests for Specifications of Sodium Stearate BP Ph Eur mongograph.
Sodium Stearate USP NF
Octadecanoic acid, sodium salt.
CAS 822-16-2
Sodium Stearate is a mixture of sodium stearate (C18H35NaO2) and sodium palmitate (C16H31NaO2), which together constitute not less than 90.0 percent of the total content. The content of C18H35NaO2 is not less than 40.0 percent of the total. Sodium stearate contains small amounts of the sodium salts of other fatty acids.
USP Reference standards—
USP Palmitic Acid RS
USP Stearic Acid RS
Identification—
A: When heated, it fuses. At a high temperature it decomposes, emitting flammable vapors and the odor of burning fat, finally leaving a residue that, when moistened with water, is alkaline to litmus paper, effervesces with acids, and colors a non-luminous flame intensely yellow.
B: Dissolve 25 g in 300 mL of hot water, add 60 mL of 2 N sulfuric acid, and heat the solution, with frequent stirring, until the separated fatty acid layer is clear. Wash the fatty acids with boiling water until they are free from sulfate, collect in a small beaker, and warm on a steam bath until the water has settled and the fatty acids are clear. Allow the acids to cool, pour off the water layer, then melt the acids, filter into a dry beaker while hot, and dry at 105 for 20 minutes: the solidification temperature of the fatty acids is not less than 54.
TESTS
Meets all the tests for Specifications of Sodium Stearate USP NF mongograph.
Sodium Stearate BP Ph Eur USP NF Manufacturers at:
Muby Group
Chemicals Suppliers, API and Excipient Suppliers, Toll manufacturing & Warehouse at Houston & Midland, Texas, USA and India
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