This r eport describes the purification and determination of freezing points and purity of 37 hydrocarbons of the API-Standard and API-NBS series, including 7 heptanes, 16 octanes, 6 pentenes, cyclopentene, and 7 CgH 12 alkylbenzenes.

Th is report describes the purification and determination of freezing points and pu rity of 29 h ydrocarbons of the API-Standard and API-N BS series, incl uding 8 nonan cs, 11 alkylcyclopcnta nes, 6 a lkyl cyclohexa ncs, and 4 bu ty lbcnzenes.

This report describes t he p urification and determination of freezing points a nd purity of 18 hydrocarbon s of t he API-Stand a rd and API-NBS se rics, in cludi ng one paraffin, four a lkylcyclopentan es, nin e alk ylcyclohexanes, two monoolefin s, o ne diolefin, and o ne acety lene.