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Calcium 10-undecenoate or Calcium Undecylenate USP Grade Supplier Exporter Manufacturers' Representative |
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Calcium 10-undecenoate or Calcium Undecylenate
CAS Number: 1322-14-1
Molecular Formula: C22H38CaO4
Molecular Weight: 406.61
Calcium 10-undecenoate or Calcium Undecylenate
Calcium Undecylenate USP Grade Specifications
C22H38O4Ca -- 406.61
10-Undecenoic acid, calcium (2+) salt.
Calcium 10-undecenoate.
Calcium Undecylenate contains not less than 98.0 percent and not more than 102.0 percent of C22H38O4Ca (calcium undecylenate), calculated on the dried basis.
Identification:
A: A filtered solution (1 in 20) in 3 N hydrochloric acid responds to the tests for Calcium.
B: Transfer 40 mL of water and 10 g of calcium undecylenate to a 250-mL separator. Cautiously and slowly add 10 mL of hydrochloric acid, while swirling. Insert the stopper, and shake. [NOTE: The separator will become quite warm, and pressure must be carefully and frequently relieved through the stopcock. If a curdy, white material remains after 5 minutes of shaking, add additional hydrochloric acid, 1 mL at a time, and shake until a clear oily phase is formed.] Allow the phases to separate, drain, and discard the bottom aqueous layer. Drain and discard the middle oily layer, if present. Filter the top layer of undecylenic acid through a pledget of cotton into a 10-mL graduated cylinder, noting the volume obtained. Transfer the filtrate to a 250-mL flask, and add an equal volume of aniline. Reflux for 1 hour, swirling the flask occasionally. Allow to cool, and pour 60 mL of alcohol through the condenser into the flask. Remove the flask from the condenser, add 1 g of charcoal, and stir. Filter the slurry into a 250-mL beaker. Add water drop-wise until a few crystals form or the solution becomes slightly cloudy. [NOTE: If too much water is added, an oil will form. Add alcohol dropwise until the oil dissolves.] Allow the mixture to stand or refrigerate until crystals are formed. Collect the crystals on a filter paper inserted in a 45-mm porous glass filter funnel. Wash the crystals with 75 mL of 25% alcohol: the crystals have a clean, white, glossy appearance. If not, re-crystallize by dissolving the crystals in about 50 mL of alcohol. Add about 1 g of charcoal, stir, filter into a 150-mL beaker, and continue as directed above, beginning with “Add water dropwise.” Dry the crystals in vacuum at 50C for 2 hours: the crystals so obtained melt between 66 and 67.5. [NOTE: If the melting point is low, additional drying or recrystallization may be necessary.]
Loss on drying: Dry it at 105 for 2 hours: it loses between 2.0% and 5.7% of its weight.
Particle size, Method: Test in accordance with this procedure, except to use not more than 25 g, and except that a single No. 100 sieve is used and is to be shaken for not less than 30 minutes or until sifting is practically complete: not less than 99.0% of it passes through a No. 100 sieve.
Limit of free undecylenic acid: Transfer 10 g of Calcium Undecylenate, accurately weighed, to a 400-mL beaker, add 250 mL of solvent hexane, and mix for 2 hours using a magnetic stirrer. Filter into a 500-mL flask, evaporate with the aid of a current of air to about 20 mL, and add 100 mL of neutralized alcohol. Add 3 drops of phph TS, and titrate with 0.1 N sodium hydroxide. Each mL of 0.1 N sodium hydroxide is equivalent to 18.43 mg of C11H20O2: not more than 0.1% is found.
Please visit SDS Safety Data Sheet of Calcium 10-undecenoate or Calcium Undecylenate Suppliers.
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