Cosmetic Formulation Science Made Simple
Formula Chemistry is your expert guide to cosmetic formulation featuring professional skincare & haircare formulas, in-depth ingredient guides, DIY recipes, and free formulas by Dr. SamiUllah, Ph.D. in Chemistry.

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Discover what each cosmetic ingredient does, why formulators use it, safe usage levels, and suitable substitutions.
New Posts & Formulations

Blog
HLB System Explained: Choosing the Right Emulsifier
Introduction Most emulsion failures are decided before mixing begins, in the choice of emulsifier. A formulator who picks an emulsifier
30 June 2026
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Blog
Phase Inversion Temperature: Advanced Emulsion Technique
Introduction Most formulators make nanoemulsions with expensive high-pressure homogenisers, assuming brute mechanical force is the only route to droplets that
29 June 2026
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Blog
Why Did My Cream Separate? (7 Reasons + Fixes)
Introduction A cream that looked perfect when you jarred it can split into oil and water within a day, and
28 June 2026
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