This formulation was subjected to in vitro analysis and delivered SPF ~16, PFA (PPD) ~5 performance with critical wavelength 374 nm.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Butyloctyl Salicylate | HALLBRITE® BHB* | 5.00 | Solvent |
| Ethylhexyl Methoxycrylene | SolaStay® S1* | 1.50 | Photostabilizer | |
| Ethylhexyl Methoxycinnamate [Octinoxate] | 2.50 | UV Filter / Sunscreen Agent | ||
| B | Titanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) | 2.10 | UV Filter / Sunscreen Agent | |
| C | VP/Eicosene Copolymer | 1.00 | Film Former | |
| Cetearyl Alcohol | HALLSTAR® TA-1618 CETEARYL ALC | 1.00 | Thickener (Nonaqueous) | |
| Glyceryl Stearate | HALLSTAR® GMS PURE | 2.50 | Emulsifier | |
| PEG-100 Stearate | HALLSTAR® PEG 4400 MS | 1.00 | Co-emulsifier | |
| Cetearyl Olivate, Sorbitan Olivate | OLIVEM® 1000 | 2.00 | Emulsifier / Liquid Crystal Maker | |
| D | Water (Aqua) (deionized) | up to 100 | Volatile Carrier | |
| Disodium EDTA | 0.05 | Chelating Agent | ||
| Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) | ||
| E | Preservative | a.n. | Preservative | |
| Glycerin | 3.00 | Humectant |
| 1 | In secondary vessel add A and start mixing, Slowly add B with continued mixing |
| 2 | Heat this oil phase to 70'C and then, add Phase C with mixing |
| 3 | To the main Vessel add Water from phase D and start mixing. Add EDTA , when dissolved, add Xanthan gum |
| 4 | When Fully incorporated, start heating to 70'C and add premix of E. |
| 5 | when both phases are at 70'C add oil phase (A-C) to the water phase (D-E) with strong mixing |
| 6 | homogenize for 3 mins and start cooling |
| 7 | continue mixing until room temperature. Replace any water lost to evaporation, and mix until smooth |
| Appearance | White Cream |
| Viscosity(Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa∙s) | 15500 - 25500 |
| pH | 5.5-6.5 |
*Patented and Patent Pending
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