Stoddard solvent, a petroleum distillate mixture of C7-C12 hydrocarbons, consists of three major groups of components: linear and branched alkanes-also known as paraffins (30 to 50%); cycloalkanes-also called cycloparaffins or naphthenes (30 to 40%); and aromatic hydrocarbons (10 to 20%).

Stoddard solvent is also known as Type I mineral spirits, Texsolve S, or Varsol 1 mineral spirits. We offer this reference material for those who need to calibrate Stoddard solvent separately. This standard is dissolved in methanol for analysis by either direct injection or purge-and-trap.

These solutions are prepared from a single-source (one-refinery) product. The weathered materials indicate the percent weight loss from the original material. Samples of regular- and premium-grade unleaded gasoline were collected, then blended in equal volumes.There are four general types of mineral spirits, classified according to boiling point range (BPR):
Type I (Stoddard solvent), BPR 149 to 182 °C
Type II (high flash point), BPR 177 to 196 °C
Type III (odorless), BPR 149 to 196 °C
Type IV (low dry point), BPR 149 to 174 °C