3,5,5-trimethylhexanoic acid composition and method for improving storage stability thereof

A 3,5,5-trimethylhexanoic acid composition comprising 3,5,5-trimethylhexanoic acid and t-butyl alcohol,

• wherein the t-butyl alcohol concentration in terms of toluene-d8 measured by gas chromatography-olfactometry/mass spectrometry after heating in an air atmosphere at 80° C. for four weeks exceeds 0 ppb by volume and is 400 ppb by volume or less;
• wherein the measurement conditions to detect the t-butyl alcohol are:
• the 3,5,5-trimethylhexanoic acid composition in an amount of 5.0 g is filled into a sealable 500-mL container and left still at 30° C. for 20 minutes or more. Then, 200 mL of the gas phase is sucked, and the residue after removing H2O, N2, O2 and CO2 is concentrated with a concentrator, and
• the concentrated sample is measured by gas chromatography-olfactometry under the conditions below, and the structure of a measured component is analyzed with a mass spectrometry detector;
• wherein the analysis column is a column using dimethylpolysiloxane as a stationary phase and a length of 60 m×an inner diameter of 320 μm×a film thickness of 1 μm;
• wherein the heating program is as follows:
• after maintaining at 35° C. for two minutes, the temperature is increased at 10° C./minute, and the temperature is maintained for seven minutes and 30 seconds after the temperature reaches 240° C.,
• wherein the carrier gas is helium;
• and
• wherein the measurement conditions of the mass spectrometry detector are as follows,
• Ionization mode:
• EI,
• Measurement type:
• scan,
• Ion source temperature:
• 250° C.,
• Quadrupole temperature:
• 150° C.,
• Electron energy:
• 70.0 eV,
• Initial mass of scanning:
• 30, and
• Final mass of scanning:
• 400.