Answer: isoprene

AnswerCrossword Clue
ISOPRENERubber ingredient
ISOPRENEPetroleum processing by-product
ISOPRENEVolatile, water-insoluble liquid
ISOPRENESynthetic-rubber ingredient
ISOPRENELiquid in synthetic rubber manufacture
ISOPRENERubber compound
ISOPRENESynthetic rubber base
ISOPRENEPetroleum byproduct used to make synthetic rubber
isoprenecolorless, volatile, water-insoluble liquid, C5H8, of the terpene class, usually obtained from rubber or from oil of turpentine by pyrolysis: used chiefly in the manufacture of synthetic rubber by polymerization