α-4-hidroksibutil-ω-hidroksipoli(oksitetrametilen), z vsebn ostjo veè kot 1 mg/kg halogena in manj kakor 1 mg/kg kovine, z barvo, ki ne presega 20 enot na barvni lestvici
á-4-Hydroxybutyl-u-hydroxypoly(oxytetramethylene), containing less than 1 mg/kg of halogen and less than 1 mg/kg of metal, and of a colour not exceeding 20 units on the Hazen scale