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Acetyl Value (AcV)

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Definition

  • The acetyl value is the number of milligrams of potassium hydroxide (KOH) required to neutralize the acetic acid liberated from 1 gram of acetylated fat or oil.

Significance

  • Provides information about the hydroxyl groups present in the fat or oil, which are acetylated during the process.

  • Important for identifying the presence of hydroxylated fatty acids or alcohols within the fat.

Principle

  • The fat or oil is acetylated (reacted with acetic anhydride), and the acetylated product is hydrolyzed.

  • The liberated acetic acid is then titrated with KOH to determine the acetyl value.

Equation of Acetyl Value

Equation of Acetyl Value

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