§ 500.23 Expression of net quantity of contents in SI Metric units.

(a) The selected multiple or submultiple prefixes for SI metric units shall result in numerical values between 1 and 1000, except that centimeters or millimeters may be used where a length declaration is less than 100 centimeters. For example, “1.96 kg” instead of “1960 g” and “750 mL” instead of “0.75 L”.

(b) The following symbols for SI metric units and none others may be employed in the required net quantity declaration:

centimeter—cm 3cubic centimeter—cm 3cubic decimeter—dm meter—m milligram—mg liter—L or l milliliter—mL or ml 2square decimeter—dm 3cubic meter—m kilogram—kg micrometer—µm gram—g millimeter—mm 2square meter—m 2square centimeter—cm

Note:Symbols, except for liter, are not capitalized. Periods should not be used after the symbol. Symbols are always written in the singular form.