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BHT/Benzo-4 performance
Hello everyone,
I was wondering if anyone could help me with what is the best way to incorporate BHT and benzophenone-4 in a formula to protect color and fragrance from UV light, more specifically in shower gels and in Perfumes. I have tried a few UV stabilizers like benzophenone-4 @ 0.1% and 0.2% (based on info i found on this forum and on the internet) and BHT @ 0.2% but the color is changing and the fragrance is going bad anyway. In perfumes, I am solubilizing them in alcohol or fragrance oil then adding alcohol, water and water soluble ingredients. I was wondering if anyone could help me figure out why isn’t it working for me because from what I have read they’re supposed to be super efficient. Am I not putting enough of them? Is it my process?
The formula for my fragrances is: alcohol 60-70%
fragrance 1.5 to 2%
solubilizer 1%
BHT or benzophenone-4 0.2%
water qsFor the shower gel: water qs
sodium benzoate 0.5%
EDTA 0.1%
SLES (70% ) 13%
CAPB (30%) 3%
glycerin 3%
fragrance oil 1%
BHT or benzophenone-4 0.2%
colorants, citric acid, sodium chlorideThank you in advance for your help I would really appreciate it.
Rina -
5 Replies
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@rina Do you see the color and fragrance change under stability conditions (high T, UV light) or at room conditions? During stability, especially if the T is high, it’s normal to have some fragrance and color change. The amounts of BHT and/or BP-4 are OK, so, if the change is significant, there might be something else going on (pH drift in the case of your shower gel, water quality, heavy metal presence in some extract, ease of oxidation of your fragrance). You could try using Tinogard TL in your shower gel and Tinogard TT in your fragrance.
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You certainly need more than Na benzoate for preservation.
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Hello,
Sorry for the delay. Thank you so much for sharing your thoughts.
@ketchito I notice the changes when exposed to UV light, but the changes are drastic. I don’t notice them at 40°C though (maybe a slight change in color and a weaker smell but that’s it). I would like to improve the stability under UV light because the products are sold in a very sunny place and the products are most of the time exposed to light. Maybe it’s the water quality… I will try with the Tinogard, thanks for your help!@PhilGeis thanks for the information, I have seen a lot of formulas using Na benzoate in shower gels. I also tried with phenoxyethanol
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Try them together.
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rina said:Hello everyone,
I was wondering if anyone could help me with what is the best way to incorporate BHT and benzophenone-4 in a formula to protect color and fragrance from UV light, more specifically in shower gels and in Perfumes. I have tried a few UV stabilizers like benzophenone-4 @ 0.1% and 0.2% (based on info i found on this forum and on the internet) and BHT @ 0.2% but the color is changing and the fragrance is going bad anyway. In perfumes, I am solubilizing them in alcohol or fragrance oil then adding alcohol, water and water soluble ingredients. I was wondering if anyone could help me figure out why isn’t it working for me because from what I have read they’re supposed to be super efficient. Am I not putting enough of them? Is it my process?
The formula for my fragrances is: alcohol 60-70%
fragrance 1.5 to 2%
solubilizer 1%
BHT or benzophenone-4 0.2%
water qsFor the shower gel: water qs
sodium benzoate 0.5%
EDTA 0.1%
SLES (70% ) 13%
CAPB (30%) 3%
glycerin 3%
fragrance oil 1%
BHT or benzophenone-4 0.2%
colorants, citric acid, sodium chlorideThank you in advance for your help I would really appreciate it.
RinaHi Rina,
For your Transparent Clear System UV Stabilization, You Need a Strong Anti Oxidant and UV Stabilizer, BHT Will Self Consumed in a Period of time and it Changes the Product Color to
Yellow, The Above reaction is the Degradation of BHT,
Better You Can Use Sodium Benzotriazolyl Butylphenol Sulfonate (and) Buteth-3 (and) Tributyl Citrate aka Cibafast H Liquid Which will do the Job.
Also Change The Preservatives.I am New to this Industry, Hope the Post will be Helpful.
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