Identify Anionic Ingredients in Formulation

Asked by: kanyarach On: November 19, 2015 Product Type: Cosmetics

Question

Based on the following ingredient list, which ingredients are negatively charged (anionic)?

Ingredients:

  • Water (Aqua)
  • Butylene Glycol
  • Glycerin
  • Calendula Officinalis Flower Extract
  • Macrocystis Pyrifera Extract
  • Vanilla Planifolia Fruit Extract
  • Hydroxypropyl Methylcellulose
  • Glyceryl Acrylate/Acrylic Acid Copolymer
  • Polysorbate 20
  • TEA-Cocoyl Glutamate
  • Propylene Glycol
  • Carbomer
  • Potassium Hydroxide
  • Citric Acid
  • Disodium EDTA
  • Chlorphenesin
  • Phenoxyethanol

Answer

Based on the ingredient list provided, the following ingredients are negatively charged (anionic) or become negatively charged in the formulation:

  • Carbomer: This is a polymer that becomes negatively charged when neutralized by a base (like Potassium Hydroxide, which is also in the list).
  • Glyceryl Acrylate/Acrylic Acid Copolymer: This copolymer contains acrylic acid groups that become negatively charged when neutralized.
  • TEA-Cocoyl Glutamate: This is an anionic surfactant.
  • Disodium EDTA: This is a salt of EDTA, which is a negatively charged chelating agent.
  • Citric Acid: This is an acid that carries negative charges depending on the pH of the formulation.

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