Home Cosmetic Science Talk Formulating 2-3% salicylic acid leave on product for scalp. Is it safe?

  • padmavathi

    Member
    August 28, 2021 at 9:47 am

    I think 2% is the max for leave on products, and 3% for rinse off.

  • abdullah

    Member
    August 28, 2021 at 9:53 am

    @Padmavathi yes but then Paula’s choice has 4% leave on BHA. That makes me confused 🤔.

    By the way, these are for skin. My question is are they safe for hair and scalp? 

    I had seen somewhere that salicylic acid makes the hair shaft weaker. But i cant find it now. 

  • zetein

    Member
    August 28, 2021 at 10:30 am

    I would buy.

  • em88

    Member
    September 9, 2021 at 8:45 am

    Abdullah said:

    @Padmavathi yes but then Paula’s choice has 4% leave on BHA. That makes me confused 🤔.

    By the way, these are for skin. My question is are they safe for hair and scalp? 

    I had seen somewhere that salicylic acid makes the hair shaft weaker. But i cant find it now. 

    Over 3% of SA is considered a drug. 
    Regarding safety, it depends on the pH of your final product.

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