Choosing essential oil bottle

During storage, degradation can occur in essential oils. The deterioration is usually caused by oxidation, resinification (condensed form compounds such as resin), polymerization (forming a viscous compound), and hydrolysis. Because of changes in these compounds, so the its color will change and become more viscous. The changes are activated by heat, oxygen from air, moisture, sunlight, and heavy metal molecules. They should be stored properly so that the deterioration will not happen or at least be slowed.
Here are the best tips on how to store essential oil properly:
Tips # 1: Choose a dark bottle
They should be stored in containers made from glass, dark (eg, brown or dark blue) to reduce the incoming rays.
Tips # 2: Consider the headspace
It is an empty space between the products with a lid. Generally, its function was to provide room for expansion of its content/volume when it was get sterilized. However, if it is too large then the contained material is very likely to get oxidized and discoloration of the packaged material will happen, whereas if it is too small then the packing tip could be broken during sterilization. Typically, its volume is approximately 10% of container capacity. So you have to consider the size of the bottle in this case.
Therefore, it should be fully loaded so that oxygen from the air in the headspace is small. If the content in the bottle is very low then it needs to be poured into another one of smaller size to avoid too large air volume in the previous bottle.
Before closing, preferably CO2 or Nitrogen gas sprayed into the headspace. CO2 and Nitrogen is an inert gas (not easily react with the material). Thus, it can be relatively free of oxygen and was replaced by carbon dioxide or nitrogen.
Tips # 3: Choose the right material for packaging
They should be stored in the place that are completely dry and must be free of heavy metals. Therefore, the essential oil bottle should be made of glass or coated with an inert material.

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