Product 1,3-butylene glycol

A product 1,3-butylene glycol, wherein, in an HPLC analysis under the following conditions after the following sample preparation, when a relative retention time of 2,4-dinitrophenylhydrazine is regarded as 1.0, a sum area value of absorbance peaks that appear within a relative retention time range of 4.4 to 12.0 is 1000 or less, and wherein

• a dinitrophenylhydrazine derivative of a carbonyl compound having 4 to 6 carbon atoms is contained as a component that corresponds to the peaks that appear within the relative retention time range of 4.4 to 12.0,
• wherein the sample preparation is as follows:
• 1000 μL of a solution of 2,4-dinitrophenylhydrazine which is extracted by adding 5 mL of acetonitrile to a 2,4-dinitrophenylhydrazine cartridge and 100 μL of 0.2 mol/L hydrochloric acid are added to 0.05 g of the product 1,3-butylene glycol and reacted at 45° C. for two hours, and
• wherein the conditions of HPLC analysis are as follows:
• measurement sample:
• a reaction liquid obtained by the sample preparation is diluted to 2 mL with a mobile phase that is used in HPLC, and the diluted liquid is used as a measurement sample,
• detector:
• UV-Vis detector,
• detection wavelength:
• 369 nm,
• analysis column:
• a column in which palmitamidopropyl group-modified silica gel (particle diameter:
• 5 μm, inner diameter×length=4.6 mm×25 cm, pore size:
• 100 Å, surface coating level:
• 2.7 μmol/m2, surface area:
• 450 m2/g, metal impurity:
• less than 5 ppm, carbon content:
• 19.5%) is used as a stationary phase,
• analysis condition:
• column temperature of 40° C.,
• mobile phase:
• acetonitrile/distilled water=50/50 (volume ratio),
• mobile phase flow rate:
• 0.4 mL/min.,
• sample injection amount:
• 20 μL.