Cosmetics Formulation Development


การละลาย Salicylic Acid ชนิดธรรมดา

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Solubility of Ordinary Salicylic Acid

Postby krittin123 » Mon Sep 10, 2018 12:39 pm

Hello team I want to make a 2% facial toner BHA I use it myself Salicylic Acid simple 2% soluble in 1,3- Propanediol ? At first I thought I would use Compl. ex but because I intend to put 1,3- Propanediol to feel good, moisturize and help. กันเสีย so I think that if the normal type is soluble it will save more. Yes, the formula Salicylic Acid Normal 2% 1,3- Propanediol 10% Natural Betaine (Trimethylglycine) 2% Mild Preserved Eco™ (Ethylhexylglycerin) 0.5% water 85.5% Thank you.
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Re: Dissolving common type of Salicylic Acid

Postby krittin123 » Mon Sep 10, 2018 6:55 pm

I found the manufacturer's information that it can be dissolved. Salicylic Acid got 15% on Propanediol Image means it should be adjusted. Propanediol in the formula, right? For complete dissolution, it would be 13.3% Salicylic Acid in Propanediol , thus adjusting the formula. as follows Salicylic Acid Normal 2% 1,3- Propanediol 15% Natural Betaine (Trimethylglycine) 2% Mild Preserved Eco™ (Ethylhexylglycerin) 0.5% water 80.5 % in this part, do I understand correctly? I have one more doubt that สารกันเสีย Is it necessary in this formula?
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Re: Dissolving common types of Salicylic Acid

Postby krittin123 » Thu Sep 13, 2018 2:23 pm

Tried the mix already by mixing Salicylic Acid in Propanediol and blend until completely dissolved. I added some water and found that it was all white flakes, so I put the rest of the ingredients in it and heated it up and blended. Found that the clear formula has no lint left. Is this method correct? can be used and expected results Salicylic Acid is it effective?
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Re: Dissolving common types of Salicylic Acid

Postby krittin123 » Thu Sep 13, 2018 5:04 pm

After several hours, it crystallized. Please suggest me. What should be done to dissolve Salicylic Acid is complete from the ingredients I ordered.
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Re: Dissolving common types of Salicylic Acid

Postby staff » Sat Sep 15, 2018 5:48 pm

Hello, the solution is tested when the formula base is Propanediol only, but if when mixed in The formula will have problems (except the member makes the formula as Propanediol 98% , Salicylic Acid 2%). The study team recommends using Complex Salicylic Acid 4-5% which will get Active Salicylic Acid 2% completely soluble in water. and no sediment
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