Home Cosmetic Science Talk Formulating (URGENT) Shampoo smell really bad after remove Peg-40 and change to Lactic Acid

  • (URGENT) Shampoo smell really bad after remove Peg-40 and change to Lactic Acid

    Posted by hakem on March 15, 2023 at 8:44 am

    Please help me, after i remove PEG-40 HCO, nd change Citric Acid to Lactic Acid. the smell is good while mixing, but after 1-3 days the scent from fragrance completely gone, and smell like chemical. how can i save the batch? or i cannot save it?

    here is the formulation

    50.99 - Aqua

    0.10 - Disodium Edta

    0.10 - Cysteine

    0.05 - Stem Cell

    0.10 - Biotin

    0.20 - Dmdm Hydantoin

    8.00 - Aqua, Cetearyl Alcohol, SLES 70%

    1.00 - Propylene Glycol

    0.06 - Titanium Dioxide

    0.17 - Mica Satin Bronze

    0.05 - Glitter Mica

    0.10 - D-Panthenol

    3.00 - Polyquaternium-7

    0.50 - Hydrolyzed Keratin

    0.20 - Silk Peptide Protein

    0.01 - Stem Cell

    18.0 - SLES 70%

    0.22 - EO

    2.15 - Fragrance

    7.00 - C. Betaine 45%

    3.50 - Caprylyl/Capryl Glucoside

    0.10 - Oil

    0.10 - Tocopherol

    3.00 - Glycerin

    0.35 - Guar Cationic

    0.05 - Lactic Acid

    0.90 - Sodium Chloride

    • This discussion was modified 8 months, 2 weeks ago by  hakem.
    • This discussion was modified 8 months, 2 weeks ago by  hakem.
    Saranya replied 8 months, 1 week ago 4 Members · 3 Replies
  • 3 Replies
  • gordof

    Member
    March 15, 2023 at 9:35 am

    hi did anything else change over the 3 days? ph? Appearance?

  • ketchito

    Member
    March 15, 2023 at 10:37 pm

    It’s hard to tell. I would guess it might be fragrance oxidation (0.1 Tocopherol in a cleanser, not enough) or contamination (if you’re using only DMDM hydantoin, your falling short, unless it’s Glydant Plus or similar, which comes with IPBC).

  • Saranya

    Member
    March 21, 2023 at 4:11 am

    Try using some essential oil (if possible) to mask the base odor and it would be more stable compared to synthetic fragrance.

    Do a stability test with and without lactic acid to make sure off odor is because of this specific swaping.

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