TSCA Definition 2019: A complex combination of hydrocarbons produced during butylene concentrate production. It consists predominantly of C4 and C8 hydrocarbons.

A complex combination of hydrocarbons obtained from distillation of the butadiene-free C4 fraction of a naphtha steam-cracking process. It consists predominantly of branched olefinic hydrocarbons having carbon numbers of C8, C12, C16 and C20 and boiling in the range of approximately 105 degrees C to 120 degrees C (221 degrees F to 248 degrees F).

A complex combination of hydrocarbons obtained from distillation of the butadiene-free C4 fraction of a naphtha steam-cracking process. It consists predominantly of olefinic hydrocarbons having carbon numbers of C8, C12, C16 and C20 and boiling in the range of approximately 170 degrees C to 185 degrees C (338 degrees F to 365 degrees F).

TSCA Definition 2019: A complex combination of hydrocarbons obtained in the production of butene concentrate. It consists of hydrocarbons having carbon numbers predominantly in the range of C3 through C5.

TSCA Definition 2019: A complex combination of hydrocarbons obtained from the thermal cracking of a mixture of ethane and propane. It consists predominantly of C4 hydrocarbons.

TSCA Definition 2019: A complex combination of hydrocarbons produced by distillation of products from a cracking process in an ethylene plant. It consists predominantly of C4 hydrocarbons.