When sourcing for B2B distribution, you must distinguish between chemical pediculicides and natural alternatives. Common chemical actives include Permethrin (1%) or Pyrethrin, which are neurotoxic to lice. However, due to increasing resistance, many buyers now prefer Dimethicone-based (silicone oil) formulas that kill lice through physical suffocation. For the 'natural' market, look for high concentrations of Tea Tree Oil, Neem Oil, or Eucalyptus, which act as effective repellents and secondary treatments.