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SunSpheres™ BIO SPF Booster

Award-Winning Bio-derived Biodegradable Sun Protection 

SunSpheres™ BIO SPF Booster is a biobased SPF booster from Dow made through the process of acid hydrolysis of wood pulp. This innovative new product works by a light scattering mechanism that offers effective UV scattering attributed to its high refractive index due to its high crystallinity, crystal size and agglomerate size.

SunSpheres™ BIO SPF Booster works as a natural SPF booster, functioning with both organic and inorganic UV filters with demonstrated in-vitro and in-vivo SPF boosting performance.


In addition to SPF Boosting properties, SunSpheres™ BIO SPF Booster also functions as a multifunctional ingredient, delivering stabilizing, thickening and shear thinning benefits.

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  • White/off white powder, micron size
  • Single constituent particles
  • INCI: Microcrystalline cellulose
  • ISO 16128 97% Natural Origin
  • Recommended use levels: 1-3%
  • High refractive index (1.51 – 1.56)
  • High crystallinity (>70%)
  • Crystal Size (100-250mm)
  • Agglomerate size (1-50 µm)

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  • Sun care creams, lotions
  • Daily wear creams, lotions
  • Foundations, concealers, BB creams


SunSpheres™ BIO SPF Booster Formulation Benefits

  • Hydrophilic easy-to-use powder
  • Compatible in bio-based formulations
  • Compatible with both inorganic and organic UVB and UVA actives
  • Allows reduced amount of UV filters in formulations
  • Excellent in aesthetically pleasing formulations
  • Suitable for sensitive skin formulations
  • Compatible in oil-in-water, water-in-oil, water-in-silicone systems
  • Functions in both cold- and hot-process systems
  • Functions as a thickener in formulations
  • Exhibits shear thinning behavior
  • Readily biodegradable
  • Non-irritating
  • Non-whitening

In-vitro SPF Heat Aging Studies

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