Study Set Content:
Also known as Ester number
Ester value
- The number of mg of KOH require to saponify the esters in 1 g of volatile oil, fats wax, resin, balsam or similar organic substance.
Ester Value
Substances that do not contain free fatty acids, the ester value is equal to the
- saponification number.
- is the difference between the saponification and acid number.
Ester value
- Also known as Iodine number
Iodine number
The number of grams of iodine absorbed under specified conditions by 100g of oil, fats, wax, or other substance.
Iodine value
Quantitative measure of unsaturated fats
Iodine value
- It serves to characterize and indicate the substances purity or if they contain admixtures.
Iodine value
- Iodine monobromide
HANUS Method
Iodine monochloride
WIJS Method
Drying oil:
IV> 120
Semi-drying oil:
IV of 100-120
Non-drying oil:
IV < 100
- Hydroxyl number
Hydroxyl value
Is the number of mg of KOH equivalent to the hydroxyl content of 1g of the substance.
Hydroxyl value
- This constant gives an indication of the identity and purity of fatty substance possessing Hydroxyl groups.
Hydroxyl value
Number of milligrams of KOH required to neutralize the acetic acid obtained by the saponification of 1 g of acetylated fatty acids
Acetyl value
saponification value of acetylated fatty acids
S
acetyl value of free fatty acids
A
acid value of original fatty acids
F =
