A question that’s often asked is – What is Vanillin and/or Ethyl Vanillin? Vanillin is one of the components that contribute to the distinct aroma of vanilla. Because the demand for vanilla flavoring has always outweighed the possible supply, much of the Vanillin is synthetically produced.
Ethyl Vanillin, a synthetic similar in structure to Vanillin, is 3 times stronger in potency but slightly different with regard to the note.
Fragrance oils that contain Vanillin or Ethyl Vanillin will oxidize faster than fragrance oils that do not contain this ingredient. This means that oxidation will cause the fragrance oils to become darker in color over time.
If you plan to dye your products, this will not be noticeable. However, if you are not using dye, you will notice the impact over time. The darker color could show up after only a week of your candles or soap curing. It could take much longer for the end-product to darken. It depends on the chemistry of the specific products you are using.
Having your finished product appear darker in color does not affect its scent throw, it is simply important for the appearance of your final product.
Fragrances that are higher in Vanillin may also crystalize in colder conditions. This is important to know for fragrance storage or conditions during transport. The Vanillin portion of the fragrance will appear as small white crystals. If crystals do appear, the integrity of the fragrance is not compromised; the oil simply separates if the temperature gets too cold. To melt the crystals, place the tightly sealed fragrance bottle in very warm water. The crystals will easily mix back into the fragrance oil.
We display the presence of these compounds and the general application % in the description page of each TruScent fragrance oil.