§ 21.118 - Methyl n-butyl ketone.

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Acidity (as acetic acid). 0.02 percent by weight, maximum.

Color. Colorless.

Odor. Characteristic odor.

Refractive index at 20 °C. 1.396 to 1.404.

Specific gravity at 20 °/20 °C. 0.800 to 0.835.

Distillation range. No distillate should come over below 123 °C. and none above 129 °C.