Supplier of: skin actives, cosmetic ingredients, cosmeceuticals, active ingredients, and skin care ingredients, for DIY skin care and cosmetics, and homemade skin care products.
Tried this on my week-old rash from flea bites. Got an almost instant relief and rash healed in 2 days. Tried it on my daughter who has eczema for a very long time. The rashes calmed down after a few days and her skin is now healing well. Really great product. Just put in order for another jar.... ...»
Wonderful base cream! Only multi-lamellar structured cream I've found on the market. Cream itself is lightweight (no oil) yet very conditioning/hydrating. Easily accepts water-soluble active ingredients as well as oil-soluble ones. I've even pushed the additional ingred % up to 20 (meaning 80% this cream, 20% added) without any separation issues. Ideal base cream for delivering actives. Personal favorite recipe calls for 5% straight Grapeseed Oil with 5% SebumREG oil active + Panthenol 1% + E Ac.. ...»
Im 45 years old; average looking skin for my age. Applied a small pea sized amount of Sea Kelp Bioferment to my face full strength in the am after washing my face of previous night makeup.; let face "dry". Then aplied my foundation as always. Noticed my thick, heavy foundation applied more easily and smooth. Keep in mind this is DAY TWO of me using this. TWO women at work ( separate departments) commented how wonderful my face looked! One specifically came up to me and asked what I was.. ...»
Jessie Sandford
Many thanks for the Silicone DM. This product is lovely quality; it is light, silky, and leaves no residue at all. I use it in the base recipe for a mouldable polymer that I then use to make a simulated 'Amber' for bead making. At the end of this process I have a silky, translucent polymer plus the most gorgeous hands in the studio ! My thanks again, Helen.. ...»
I am following the moisturizing cream + Zinc dispersion recipe and I am extremely satisfied. I do allow for a little time for it to absorb in & then I dab off anything that I feel looks a little white - but that's because I initially use a fairly thick coating on myself. I use a bit of foundation at times on top and there are no issues as far as weird colors or texture issues. I am so grateful for this entire website as a one-stop-shop for such effective skin care products, and now we can.. ...»
I just placed my first order for SEaKelp Bioferment from Bulk Actives and was pleased to receive it very quickly.. ...»
I have a blind faith of this Pre Liposome Microemulsion, especially it is made in Japan & of Squalane & Lecithin which I am fond of. I mixed it with Palmitoyl oligopeptide and palmitoyl tetrapeptide-7 peptides liposome emulsion & some other water actives like Glucosamine, Niacinamide, Glutathione etc and the serum was very smooth and moisturizing. As it claims, it penetrates into the skin very well. I will mix it with oil soluble actives in my next batch. .. ...»
This is an excellent additive for increased absorption into the skin. I personally incorporate it with the ceramide lamellar crystal emulsion and multi lamellar base cream V2. The final product delivers a soothing, calming, super moisturizing liquid that penetrates the skin and helps the healing of severe skin issues such as mine (ichthyosis, keratosis). I highly recommend this formulation for those who are not getting any relief from other products and prescription topicals. My skin is finally .. ...»
I am very happy with my purchase of SKB from BulkActives. Good quality and packaged well. I use SKB in my Vitamin C serum. Will buy from them again. Can't beat the price either! .. ...»
Excellent cold emulsifier. Easy to use and a little goes a long way. Gives product a soft luxurious feel excellent for high end personal skin care products. Wish it came in a larger size..... ...»
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Tinosorb S Aqua (Bemotrizinol)

Tinosorb S Aqua is the new, water soluble version of the oil soluble Tinosorb S. Tinosorb S Aqua acts in the water phase to provide broadest-possible UV protection and photo-stability. It is highly efficient at low concentration, and can be processed cold. Combining Tinosorb M and Tinosorb S Aqua has a synergic effect on both UVA and UBV protection, thus an overall enhancement on SPF

Key benefits of Tinsosorb S Aqua in skin care:

  • Can be incorporated in sunscreens, but also in day care products as well as
  • Large coverage of the UV-13 and UV-A range
  • Photostable
  • Ease of formulation
  • Less UV absorber required
  • Excellent compatibility with cosmetic ingredients and other UV filters
  • Ability to photostabilize other UV filters
  • Synergistic effect with UV-13 filters (SPF booster)
Product Code: BulkActives
CAS#: 187393-00-6, 9011-14-7, 1335-72-
Net weight: 50g / 1.76oz
Availability: Product Out Of Stock
Price: $24.90

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Tinosorb S Aqua is the new, water soluble version of the oil soluble Tinosorb S (Bemotrizinol). Bemotrizinol, which an oil-soluble organic UV filter, is currently considered to be the most effective UV absorber in terms of SPF [1]. Bemotrizinol is a broad spectrum UV filter with efficient absorption in both UVA and UVB spectrums, peaking at 310 (UVB) and 340 (UVA) nm [2]. Besides its efficiency, Tinosorb is characterized by high stability. Research showed that even after being exposed to 50MED (minimal erythemal dose) over 98% of it remains intact [3].

Tinsosrb S Aqua UV Wavelength

Tinosorb S Aqua was specially created to bring the powerful properties of Tinosorb S – which is a powder – in the water phase. Tinosorb S aqua acts in the water phase to provide broadest-possible UV protection and photo-stability. It offers increased formulation flexibility and the broadest spectrum UV protection in the water phase which makes it ideal for formulations with other UV filters both organic and inorganic.  
Because it comes in the form of liquid dispersion, Tinosorb S aqua has great flexibility and versatility when it comes to formulation. Similar to the other products in the Tinosorb range – M and S, it is very efficient at low concentration and free of preservatives. Furthermore – it can be cold processed [4].

It offers increased formulation flexibility, and can also be combined with its oil-soluble counterpart, Tinosorb® S. It is highly efficient at low concentration, free of preservatives and can be processed cold. Tinosorb® S Aqua is ideal for a wide array of effective sun care and face care products.

Studies assessing Tinosorb’s safety showed that when formulated into a sunscreen showed the skin penetration is minimal thus completely compatible with cutaneous use [5]. Furthermore, Bemotrizinol acts as a stabilizing agent for less stable compounds such as avobenzone [6].

Some organic (chemical) UV filters raised concern on locally inducing estrogenic activity, thus potentially inducing hormonal imbalance. Laboratory research assessing Tinosorb products safety when it comes to hormonal activity showed that no estrogenic activity was registered [7]. Concluding, it can be said that besides being them most efficient UVR filter available it is also highly stable and very safe to use.  

Due to its stability and UVR coverage Tinosorb S aqua is a great sunscreen by itself. Because it’s a liquid dispersion it is excellent to be included in other cosmetic formulations besides sunscreen. Basically, it can be used in any cosmetic formulation that needs SPF – such as bbcreams, day creams, anti-aging products, body lotions, and so on. 

However, Tinosorb S aqua was developed to pack the potency of Tinosorb S in a flexible matrix and implicitly to expand the versatility of formulation. Due to its stabilizing and synergic effects it can be used in combination with both organic and inorganic UV filters. The Tinosorb product range was especially developed to provide complete formulation of oil in water (O/W) suspension which is a superior formulation when it comes to uniform coverage, protection and efficiency [2].

Formulating Tinosorb S aqua and Tinosorb M together has a synergetic effect on both UVA and UBV protection, thus an overall enhancement on SPF. When it comes to UV filters the synergetic effect is defined as the phenomenon that happens when the combination of two or more UV filters has as a result a SPF higher than the sum of the individual SPFs. In the case of combining S aqua and M, synergy is attained in the whole UV spectrum. Tinosorb S aqua also showed synergistic efficiency with other organic UV filters such as  ethylhexyl triazone or iscotrizinol [8] as well as inorganic ZnO and TiO2 [9].

Tinosorb M and Tinosorb S Aqua Synergy

Oil in Water formulation of sunscreen offers several advantages sunscreen formulation has several advantages. Because of the emulsion, the UV filter exists in both the water and the oil phases a fact which supplies superior efficiency at low concentration and a higher SPF. O/W sunscreens are also more efficient because they provide better skin coverage and less frequent re-applications are necessary.

Oil in Water Emulsion

Between 2-5% of Tinosorb S aqua is sufficient to meet the SPF requirements in various parts of the world, assessing to the Tinosorb product range efficiency. Due to its high resistance to UVR Tinosorb S aqua also has a photo-stabilizing effects to the formulation. The Tinosorb product range, alongside ZnO are the ideal ingredients for developing and refining an individual sunscreen that best suits the skin particularities. 

CAS#: 103597-45-1
INCI: Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine (and) Polymethyl Methacrylate
CAS#: 187393-00-6, 9011-14-7, 1335-72-4, 124-68-5
Solubility: water
Suggested percentage: 1 to 10%

Storage: Cool, dry place. Do not freeze. Keep away from light and moisture!
Manufacturer: BASF

  1. Couteau C, Pommier M, Paparis E, Coiffard LJ (June 2007). "Study of the efficacy of 18 sun filters authorized in European Union tested in vitro". Pharmazie. 62 (6): 449–52
  2. (2017). TINOSORB® S | BASF's Care Creations. [online] Available at:
  3. Vielhaber, G., Grether-Beck, S., Koch, O., Johncock, W. and Krutmann, J. (2006). Sunscreens with an absorption maximum of ≥360 nm provide optimal protection against UVA1-induced expression of matrix metalloproteinase-1, interleukin-1, and interleukin-6 in human dermal fibroblasts. Photochemical & Photobiological Sciences, 5(3), p.275.
  4. (2017). TINOSORB® S AQUA | BASF's Care Creations. [online] Available at:
  5. Mavon, A., Miquel, C., Lejeune, O., Payre, B. and Moretto, P. (2006). In vitro Percutaneous Absorption and in vivo Stratum Corneum Distribution of an Organic and a Mineral Sunscreen. Skin Pharmacology and Physiology, 20(1), pp.10-20
  6. Chatelain E, Gabard B (September 2001). "Photostabilization of Butyl methoxydibenzoylmethane (Avobenzone) and Ethylhexyl methoxycinnamate by Bis-ethylhexyloxyphenol methoxyphenyl triazine (Tinosorb S), a new UV broadband filter". Photochem Photobiol. 74 (3): 401–6
  7. Ashby, J., Tinwell, H., Plautz, J., Twomey, K. and Lefevre, P. (2001). Lack of Binding to Isolated Estrogen or Androgen Receptors, and Inactivity in the Immature Rat Uterotrophic Assay, of the Ultraviolet Sunscreen Filters Tinosorb M-Active and Tinosorb S. Regulatory Toxicology and Pharmacology, 34(3), pp.287-291.
  8. CIBA Chemicals - Tinosorb S Broad Spectrum UV absorber datasheet
  9. Herzog, B., Mongiat, S., Deshayes, C., Neuhaus, M., Sommer, K. and Mantler, A. (2002). In vivo and in vitro assessment of UVA protection by sunscreen formulations containing either butyl methoxy dibenzoyl methane, methylene bis-benzotriazolyl tetramethylbutylphenol, or microfine ZnO. International Journal of Cosmetic Science, 24(3), pp.170-185.

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