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Broad Spectrum SPF 50 Sunscreen Cream

This formulation yields a broad spectrum (SPF/PFA ≤3) sunscreen cream. SolaStay® S1 is incorporated to mitigate the photocatalytic and reactive oxygen species generating activities of Titanium Dioxide and to rapidly and efficiently quench the excited states of Avobenzone. This product was subjected to in vitro analysis and delivered SPF ~55, PFA (PPD) ~30 performance with critical wavelength 379 nm.

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PhaseINCI Name [INN/USAN] (Other Information)Trade Name% WtFunction
AEthylhexyl MethoxycryleneSolaStay® S1*3.00Photostabilizer
Homosalate [Homosalate] 10.00UV Filter / Sunscreen Agent
Ethylhexyl Salicylate [Octisalate] 5.00UV Filter / Sunscreen Agent
Butyloctyl SalicylateHALLBRITE® BHB*5.00Sunscreen Solvent / Emollient
BTitanium Dioxide [Titanium Dioxide], Aluminum Hydroxide (60 nm primary particle size) 2.10UV Filter / Sunscreen Agent
CCetearyl AlcoholHALLSTAR® TA-1618 CETEARYL ALCOHOL0.50Emulsion Stabilizer
VP/Eicosene Copolymer 1.00Film Former
Glyceryl StearateHALLSTAR® GMS PURE1.60Emulsifier
PEG-100 StearateHALLSTAR® PEG 4400 MS1.20Emulsifier
Potassium Cetyl Phosphate, Hydrogenated Palm Glycerides 2.20Emulsifier
DButyl Methoxydibenzoylmethane [Avobenzone] 4.00
EWater (Aqua) (deionized)  up to 100Volatile Carrier
Disodium EDTA 0.05Chelating Agent
Xanthan Gum (pharma grade) 0.20Thickener (Aqueous)
FPreservative a.n.Preservative
Glycerin 3.00Humectant
GWater (Aqua) (deionized) up to 100Volatile Carrier
Phenylbenzimidazole Sulfonic Acid [Ensulizole] 1.50UV Filter / Sunscreen Agent
Sodium Hydroxide (10% aqueous) 2.15pH Adjuster


1In secondary vessel combine phase A and start mixing. Slowly add phase B to phase A with continued mixing and fully disperse.
2Heat phase AB to 85°C and then add phase C items to it in order with mixing. When homogenous, add phase D to phase ABC with mixing.
3Add the water from phase E to the main vessel, dissolve the Disodium EDTA with continued mixing and then add Xanthan Gum, stirring until fully incorporated before continuing. Then start heating phase E to 80°C and add premix phase F to it.
4Make phase G solution, bringing its pH to 7.5 - 8.0 by adjusting the Sodium Hydroxide level as needed, and then add it to phase EF.
5When both phases are homogeneous and at their designated temperatures, slowly add the oil phase ABCD to the water phase EFG with prop mixing. Homogenize for 3 minutes, then resume prop mixing and cool with mixing until batch is at room temperature.


AppearancePale Yellow Cream
Viscosity (Brk, RVDV-II, T-D, 20 rpm, after 24 h at room temperature; mPa·s)14000 - 24000
pH6.0 - 7.0

*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

Tel.: 877 427 4255 (International n.: +1 312 385 4494) - Fax: +1 330 929 3616 - E-mail: Web Site: