Castor oil: fixed vegetable oil (ricinoleic acid triglyceride).
Castor oil testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.
8001-79-4
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Fixed vegetable oil (ricinoleic acid triglyceride)
Identity: Castor oil
Method for the $250 identity, purity and quantity test: Chromatographic assay, with detection selected for the compound, against a reference standard, with results in 3 to 5 business days.
The USP monograph covers identity by fatty acid composition by chromatography and UV spectroscopy, triglyceride composition by HPLC, and acid value, hydroxyl value, peroxide value, unsaponifiable matter, water and specific gravity. Full testing to the USP Castor Oil monograph is available and quoted.
Chromatographic purity and mg per unit by the method matched to the compound, identity against a reference standard. 1 unit.
| Add-on test | Price |
|---|---|
| Identity and impurities | |
| FTIR identity | $90 |
| CHNS elemental analysis (carbon, hydrogen, nitrogen, sulfur) | $125 |
| Chiral purity (where a chiral method exists; new methods quoted) | $250 |
| Water, solvents and salt form | |
| Water content by Karl Fischer | $60 |
| Residual solvents | $150 |
| Counterions: chloride, acetate and TFA | $70 |
| Assay | |
| Assay, % w/w (with raw powder purity; $250 together) | +$50 |
| Metals and conformity | |
| Heavy metals: arsenic, cadmium, chromium, mercury and lead | $150 |
| Conformity: purity and quantity on more units from the same lot | $100 per extra unit |
| Microbiology (injectables) | |
| Endotoxin | $210 |
| Sterility or bioburden | $150 |
| Container closure integrity (CCI) | $50 |
| Screening | |
| Fentanyl screen | $50 |
10% off for 10 or more samples.
Need something else? Other tests are available on request.
Purity and quantity is $250 per sample (1 unit) and raw powder purity is $200 for 50 mg, with results in 3 to 5 business days. Send the material sealed and labeled, with the label claim and the form it contains.
No. The $250 test covers identity, purity and quantity by a chromatographic assay, with detection selected for the compound. Full testing to the USP Castor Oil monograph is available and quoted.
Castor oil is a mixture of triglycerides. The fatty acids are converted to methyl esters, which gives a fatty acid profile dominated by ricinoleic acid, typically close to 90 percent.
Yes. Other vegetable oils have very little ricinoleic acid and more oleic, linoleic or palmitic acid, so blending shifts the fatty acid profile in a way the test picks up.
No. Hydrogenated castor oil is a waxy solid in which ricinoleic acid has been converted mostly to 12-hydroxystearic acid, so its fatty acid profile differs from liquid castor oil.
Identity facts from the USP monograph header for this compound.
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