Reference number
ISO 6794:1981
ISO 6794:1981
© ISO 2024
ISO 6794:1981
Butane-1,4-diol for industrial use — Determination of degree of unsaturation
Edition 1
1981-10
1981-10
Retirada
Resumen
A test portion is treated with a solution of bromine in absolute methanol saturated with sodium bromide (Kaufman solution). After addition of potassium iodide solution the liberated iodine is titrated with standard volumetric sodium thiosulfate solution. The degree of unsaturation is expressed as iodine value, the number of grams of iodine absorbed by 100 g of a substance under specified conditions of test.