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1.1 ,This practice covers, by compositional analysis, the approximate determination of the following physical characteristics of commercial propane, special-duty propane, commercial propane/butane mixtures, and commercial butane (covered by Specification D1835): vapor pressure, relative density, and motor octane number (MON).
1.1.1 ,This practice is not applicable to any product exceeding specifications for nonvolatile residues. (See Test Method D2158.)