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Evolution of Stabilizers for Candles

  • Butylated Hydroxytoluene (BHT) is a common antioxidant used to stabilize wax
  • Typically added at 50 to 100 ppm level by wax manufacturers
  • BHT causes color changes by a reaction which creates an unstable color species
  • Discoloration can occur in packaging prior to light exposure
  • Can be antagonistic with Hindered Amine Light Stabilizers (HALS)


Evolution of Stabilizers for Candles

  • Benzophenone and benzotriazole UV absorbers were introduced to the candle industry in the late 1980s and early 1990’s to protect formulations with complex fragrance chemistry and dyes that are not light stable
  • The primary UV absorbers used in candle formulations are UV-5411, UV-328 and UV-531
  • In the late 1990’s and early 2000’s, Hindered Amine Light Stabilizers (HALS) radical scavengers were introduced to the candle industry
  • Redshifted benzotriazole UV absorbers with high molar efficiency were pursued but did not gain traction

For more information on Stabilizers, click the link below

>>>Stabilizer Technologies and Their Functionality in Candle Formulations<<<