SWIM has another question regarding heptane and naptha. SWIM has read that pure heptane (Bestine) is superior to use when doing a recrystallization. However, is heptane preferred to naptha when performing the primary extractions of the alks from the basified mixture (as in Noman's tek)? If SWIM was doing Noman's tek, is there any advantage to purchasing both naptha and bestine, or would the Bestine alone be sufficient? Thanks for your help, SWIM as been studying quite a lot lately and appreciates the quality of info at the Nexus.