U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
(a) Acidity (as acetic acid). 0.02 percent by weight, maximum.
(b) Color. Colorless.
(c) Odor. Characteristic odor.
(d) Refractive index at 20 °C. 1.396 to 1.404.
(e) Specific gravity at 20 °/20 °C. 0.800 to 0.835.
(f) Distillation range. No distillate should come over below 123 °C. and none above 129 °C.
