• Formulating

  Tear-Free Shampoo Formulations

  Posted by tecnico3vinia on January 31, 2022 at 6:16 pm

  Hey!

  I have some questions about the so-called ‘tear-free’ formulations (baby shampoos and body washes). My main question is about the pH of these products. I once learned that is better to have a pH around 7, but why? Is only the low pH values that causes stinging in babies eyes? Harsh surfactants can also causes stinging? Is it really necessary to adjust the pH to ~7?

  Thanks in advance! 🙂

  Best regards,

  ketchito replied 1 year, 4 months ago 3 Members · 2 Replies

  • baby-safe
  • body-wash
  • ph
  • shampoo
• 2 Replies

• 

  Microformulation

  Professional Chemist / Formulator

  January 31, 2022 at 7:04 pm

  No Tear Shampoos do not gain their function through pH. It is a function of the surfactants used. Here is a previous discussion; https://chemistscorner.com/cosmeticsciencetalk/discussion/2425/tear-free-shampoo-materials

• 

  ketchito

  Member

  February 1, 2022 at 3:33 am

  I agree with @Microformulation. Regarding surfactants, highly ethoxylated (like PEG-80 sorbitan laurate) are prefered, even more if they are non ionic. 

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