指标                 

Contaminants                 Specifications(wt%) 

杂质                           规格

Cis-2-butene 顺-2-丁烯            <2.5 

1,3-Butadiene1,3-丁二烯           <0.1 

C5 Hydrocarbons                 <0.3 

Alkynes 炔烃                     <300ppm 

Propadiene 丙二烯                <100ppm 

Residue on Evaporation 蒸发残余物<500ppm 

Inhibitor（TBC）TBC添加剂        <100ppm 

Total Impurities 杂质总量           <3