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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DIY Encyclopedia
Discover what each cosmetic ingredient does, why formulators use it, safe usage levels, and suitable substitutions.
New Posts & Formulations
Blog
Cosmetic Stability Testing: Methods & Timelines
Quick Answer Cosmetic stability testing combines accelerated storage, commonly 12 weeks at 40°C, with real-time storage at 25°C across the
18 July 2026
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Blog
Preservative Efficacy Testing (PET): Complete Guide
Quick Answer Preservative efficacy testing inoculates a cosmetic with five specified organisms at more than 10⁵ CFU per gram, then
17 July 2026
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Blog
How to Price Cosmetic Products (Formula)
Quick Answer To price cosmetic products, calculate your true cost of goods, including packaging, filling, freight, wastage, and amortised testing,
16 July 2026
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