The hydroxyl value can be calculated using the following equation.
2.
ASTM D 1957 and ASTM E222-10 describe several versions of this method of determining hydroxyl value.
3.
The conversion between hydroxyl value and other hydroxyl content measurements is obtained by multiplying the hydroxyl value by the factor 17 / 560.
4.
The conversion between hydroxyl value and other hydroxyl content measurements is obtained by multiplying the hydroxyl value by the factor 17 / 560.
5.
The acid value ( AV ) of the substance, determined in a separate experiment, enters into this equation as a correction factor in the calculation of the hydroxyl value ( HV ):
6.
Where HV is the hydroxyl value; V B is the amount ( ml ) potassium hydroxide solution required for the titration of the blank; V acet is the amount ( ml ) of potassium hydroxide solution required for the titration of the acetylated sample; W acet is the weight of sample ( in grams ) used for acetylation; N is the normality of the titrant; 56.1 is the molecular weight of potassium hydroxide; AV is a separately determined acid value of the chemical substance.
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