This oil-in-water sunscreen lotion provides SPF 50 UV protection using only mineral UV filters — specifically non-nano zinc oxide. Despite its high ZnO load (25%), it is a quick-absorbing formula with flowable viscosity. HallBrite® ZDX Clear enables a high SPF performance and, in combination with Biochemica® Craft Shea Butter, provides a stable foundation and smooth texture. In vivo testing in a US laboratory (3 subjects) yielded static SPF 60, with 40 minute water resistance of SPF 50. In vitro PFA (PPD) ~18 performance with critical wavelength = 372 nm. UVA1/UV = 0.80.
| Phase | INCI Name [INN/USAN] (Other Information) | Trade Name | % Wt | Function |
|---|---|---|---|---|
| A | Zinc Oxide (68%), Butyloctyl Salicylate, Ethylhexyl Isononanoate, Ethylhexyl Methoxycrylene, Polyhydroxystearic Acid | HallBrite® ZDX Clear | 37.00 | UV Filter/Sunscreen Agent / Carrier System |
Tocopherol | Biochemica® Vitamin E Natural | 0.50 | Antioxidant Agent | |
Butyrospermum Parkii (Shea) Butter | Biochemica® Craft Shea Butter | 3.00 | Emollient | |
| B | Cetearyl Glucoside (and) Cetearyl Alcohol | 4.00 | Emulsifier | |
| C | Xanthan Gum (pharma grade) | 0.30 | Thickener (Aqueous) / Emulsion Stabilizer | |
| Glycerin | 4.00 | Humectant | ||
| D | Trisodium Ethylenediamine Disuccinate (37% active) | 0.30 | Chelating Agent | |
| Water (Aqua) | up to 100 | Volatile Carrier | ||
| E | Preservative | a.n. | Preservative | |
| Silica (spherical, 12 µm) | 2.00 | Deoiling Agent | ||
| F | Sodium Hydroxide (20% aqueous) | a.n. | pH Adjuster |
PREPARATIVE PROCEDURE
| 1 | To a secondary vessel add phase A and start mixing, Heat to 80°C and then add phase B. |
| 2 | To the main vessel, add premixture phase C, start mixing and add phase D with mixing. Heat phase to 75°C. |
| 3 | When both phases are homogeneous and at their designated temperatures, slowly add phase AB to phase CD with prop mixing. |
| 4 | After 5 minutes, start cooling the batch. When batch is below 50°C add phase E items one by one with mixing. |
| 5 | Continue mixing until batch is at room temperature, replacing any water lost to evaporation and mixing until smooth. |
| 6 | Adjust pH to 7.0-7.5 with phase F if needed |
PRODUCT CHARACTERISTICS (25°C)
| Appearance | Off-white lotion |
| Viscosity (20 rpm, Brk, RV DV-II, T-D, after 24h at room temperature; mPa∙s): | 8000 - 10000 |
| pH (as is) | 7.0 - 7.5 |
*Patented and Patent Pending
The information presented herein is believed to be accurate and reliable, but no warranty or guarantee, expressed or implied, is made regarding the information or the performance of any product. Further, nothing contained herein shall be taken as any inducement or recommendation to use, manufacture or sell that may infringe any patents or any other proprietary rights now or hereafter in existence, nor to imply compliance with any regulatory requirements
The Hallstar Company - 120 South Riverside Plaza Suite 1620 - Chicago, IL 60606-3911 USA hallstarbeauty.com