CFR › Title 27 › Part 21 › §21.12627 CFR §21.126Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Congealing point. 10.0° to 11.2 °C.(b)Refractive index at 20 °C. 1.5363 to 1.5385.(c)Specific gravity at 15 °/15 °C. 1.100 to 1.107.(d)Odor. Characteristic odor.