Packaging and storage
Preserve in tight containers, and avoid exposure to excessive heat.
Free fatty acids 401
Weigh accurately 20 g into a conical flask, melt on a steam bath, add 75 mL of hot alcohol that previously has been neutralized with 0.1 N sodium hydroxide to
phenolphthalein TS, swirl, and add 1 mL of phenolphthalein TS. Titrate with 0.1 N sodium hydroxide VS, swirling vigorously, until the solution remains faintly pink after being shaken for 60 seconds: not more than 11.0 mL of 0.1 N sodium hydroxide is required.
Hydroxyl value
The hydroxyl value is between 154 and 162, determined as directed in the test for Hydroxyl value under Castor Oil.