Home Cosmetic Science Talk Formulating How do you clean your lab glassware after formulating with sunscreens?

  • How do you clean your lab glassware after formulating with sunscreens?

    Posted by Rafacasti on June 9, 2021 at 7:48 pm

    This has been a difficult job that takes several days… It looks like powdered ingredients as Parsol (TX and ZX) once heated stick to the glass and become extremely problematic. I can’t clean the containers easily, the remains of the formulation hardens and even when I heat water to make the glass hot, it takes a lot of time to clean because the residues spread through all the glass, leaving a white trail that makes me really mad. :pensive:

    The only solution I found was to leave the container immersed in water for a few days until the detachment becomes easier, but I think there must be a better way to solve this. There needs to be. :sweat_smile:

    Thank you in advice! :blush:

    bill_toge replied 2 years, 5 months ago 3 Members · 3 Replies
  • 3 Replies
  • EVchem

    Member
    June 10, 2021 at 4:18 pm

    You could try doing an oil rinse and then following with alcohol/ surfactant. Or maybe invest in a sonicator / an ultrasonic jewelry cleaner

  • Rafacasti

    Member
    June 18, 2021 at 5:47 pm

    EVchem said:

    You could try doing an oil rinse and then following with alcohol/ surfactant. Or maybe invest in a sonicator / an ultrasonic jewelry cleaner

    Thank you! I did it with Sunflower oil (Helianthus Annus (Sunflower) Seed Oil) and LESS (Sodium Laureth-2 Sulfate) together and to finish I used a type of paper towel to remove the rest of the sunscreen formulation. It worked out well and made my job a lot easier, very very thank you!

    Anyway, sunflower oil maybe wasn’t a good choice, I just did it for testing. Do you have any recommendations for a cheaper oil to use instead?

  • bill_toge

    Member
    June 20, 2021 at 1:00 pm

    in my experience, solvent degreaser (a mixture of petroleum spirit and oil-soluble poloxamer) followed by alcohol spray is an excellent way to shift water-resistant residues

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