Sorbitan Trioleate
(sor' bi tan trye oh' lee ate).
» Sorbitan Trioleate is the triester of Oleic Acid and Sorbitol and its mono- and dianhydrides. It yields, upon saponification, not less than 85.5 percent and not more than 90.0 percent of fatty acids, and not less than 13.0 percent and not more than 19.0 percent of polyols (w/w).
Packaging and storage—
Preserve in tight containers.
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Identification—
It responds to Identification tests A and B under Sorbitan Monooleate.
Acid value 
401
:
not more than 17.
401:
not more than 17.
Hydroxyl value 401:
between 50 and 75.
401:
between 50 and 75.
Iodine value 401:
between 77 and 85.
401:
between 77 and 85.
Saponification value 401:
between 169 and 183.
401:
between 169 and 183.
Water, Method I 921:
not more than 0.7%.
921:
not more than 0.7%.
Residue on ignition 281:
not more than 0.25%.
281:
not more than 0.25%.
Heavy metals, Method II 231:
0.001%.
231:
0.001%.
Assay for fatty acids—
Transfer about 8.6 g of Sorbitan Trioleate, accurately weighed, to a 500-mL conical flask, cautiously add 100 mL of alcohol and 3.5 g of potassium hydroxide, then add a few glass beads, and mix. Proceed as directed for Assay for fatty acids under Sorbitan Monooleate, beginning with “Connect a suitable condenser.”
Assay for polyols—
Proceed as directed for Assay for polyols under Sorbitan Monooleate.
Auxiliary Information—
Please check for your question in the FAQs before contacting USP.
| Topic/Question | Contact | Expert Committee |
|---|---|---|
| Monograph | Robert H. Lafaver, M.S.
Scientific Liaison 1-301-816-8335 |
(EXC2010) Monographs - Excipients |
| Reference Standards | RS Technical Services 1-301-816-8129 rstech@usp.org |
USP35–NF30 Page 1965