Supplier of: skin actives, cosmetic ingredients, cosmeceuticals, active ingredients, and skin care ingredients, for DIY skin care and cosmetics, and homemade skin care products.
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..... ...»
Very easy to use. I like it as a thickener for ready emulsion if it is too liquid. Using it as a single emulsifier keep in mind to add less actives... ...»
I have been a regular customer of BulkActives SeaKelp. I've used it for years after washing my hair. I put a little in my hair and it makes it comb out tangles extremely easy. My hair is about to my midback. My hair is what I would call in pristine condition I think because of this. My hair is dyed so it's not like it is virgin hair. I also blow dry on occasion and use a straightener daily. This is my holy grail and hair products. I believe it keeps my hair "young". Their SeaK.. ...»
Carol P
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Tinosorb M (Bisoctrizole)

Tinosorb M is the first UV filter to combine the two worlds of organic filters and micro fine inorganic pigments: it is a 50% aqueous dispersion of colorless microfine organic particles, which are less than 200nm in size and is dispersible in the water phase of an emulsion. Tinosorb M exhibits the widest UV absorption and delivers triple action: UV absorption due to the intrinsic photostable organic molecule, light scattering and reflection as a result of its microfine structure. 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 M 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
Reward Points: 12
CAS#: 103597-45-1
Net weight: 50g / 1.76oz
Availability: In Stock
Price: $23.10
Reward Points: 1155

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About Tinosorb M Bisoctrizole in DIY Skin Care

Tinosorb M is an innovative UV filter with a hybrid technology that combines organic filters with inorganic micro-fine pigments. It a water soluble ingredient that is added to sunscreens to provide additional UV absorption. Tinosorb M is presented as a 50% aqueous dispersion of less than 200nm micro-particles which can be easily incorporated in a sunscreen in the water phase of an emulsion. It has numerous advantages: easy to use, can be cold processed, efficient at low concentrations and contains no preservatives.

Recent research showed that a microfine organic-inorganic technology ensures enhanced SPF and UVR coverage, because the two components have a synergic effects [1]. Tinosorb M is acts both as an organic UV filter by absorbing the UV radiation and as an inorganic filter (due to the microfine pigment particles) deflecting the ultraviolet radiation [2].

 Tinosorb M Bisoctrizole
Figure 1 – Tinosorb M organic-inorganic features [2]
Tinosorb M is very stable [3] and highly efficient in protecting against both UVA and UVB radiation   due to its triple action: UV absorption by a photostable organic molecule, light scattering and light reflection by its microfine structure. This enables Tinosorb M can absorb both UVA and UVB rays, providing a complete protection against the whole ultraviolet spectrum.

The active ingredient in Tinosorb M, Bisoctrizole is a broad-spectrum sunscreen that absorbs UVR and due to its microfine structure, with particles smaller than 200nm also reflects and scatters. Thus, Tinosorb M is able to succeed where other organic UV filters do not, especially in the UVB area. Research shows that formulations with Tinosorb M have efficiency comparable with zinc oxide (ZnO) and titanium dioxide (TiO2) [4].

Tinosorb M Bisoctrizole Broad Spectrum

Figure 2 – UVA and UVB absorption spectrum of Tinosorb M (2)

Studies assessing bisoctrizole’s safety showed that when formulated into a sunscreen, bisoctrizole has minimal skin penetration, which makes it completely suitable for cutaneous use [5]. Also, unlike other chemical (organic) sunscreens, Tinosorb M is very stable when it comes to UVR photodegradation. Furthermore, bisoctrizole acts as a stabilizing agent for less stable compounds such as avobenzone [3]. Regarding the concern that like other organic UV filters, BASF’s Tinosorb product range may disturb the estrogenic balance, by interacting with the estrogen receptors, laboratory research showed that tinosorb products are safe. No estrogenic activity was registered [6]. Concluding, it can be said that Tinosorb is not only one of the most efficient sunscreen ingredient but also that it is very safe for use.

Due to its stability and UVR coverage Tinosorb M is a great sunscreen by itself but it is also a great ingredient for more complex formulations.  Due to its stabilizing and synergic effects it can be used in combination with both organic and inorganic UV filters. Formulating Tinosorb M with Tinosorb S aqua – another member of the BASF Tinosorb product range makes one of the most efficient UV formulation available. Combining Tinosorb M with Tinosorb S aqua offers the possibility of formulating oil in water (O/W) suspension. O/W sunscreen suspensions are superior when it comes to coverage, uniform protection and efficiency [7].

O/W sunscreen formulation has several advantages: the UV filters are present in both the water and the oil phase (most sunscreens have the UV filter only in the oil phase), high efficiency at low concentration, superior SPF. And last, but not least, O/W formulations are more cosmetically appealing [8], with better skin coverage and longer skin resistance (less frequent re-applications are necessary.  

Tinsorb M Tinsorb S Aqua Emulsion

Figure 3 – oil in water emulsion with active UV filter in both water and oil phases (combination of Tinosorb M with Tinosorb S aqua) [9].
Combining Tinosorb M and Tinosorb S has a synergic effect on both UVA and UBV protection, thus an overall enhancement on SPF. Synergy is 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 [10].

Tinosorb S and Tinosorb M SPF

In conclusion, Tinosorb M is easy to use, safe, stable, stabilizing and one of the most efficient currently available organic UV filters [10].
Note that some studies (by the same authors) indicate that Tinosorb M, containing decyl glucoside, is a frequent cause of allergic contact dermatitis.

We suggest that you start out with using a small percentage of this UV filter, test it first on the inside of your elbow for a period of time and, if there are no problems, gradually increase the amount (up to 10%).
Assay: 50% Bisoctrizole
CAS#: 103597-45-1
INCI: Methylene Bis-Benzotriazolyl Tetramethylbutylphenol (and) Aqua (and) Decyl Glucoside (and) Propylene Glycol (and) Xanthan Gum
Appearance: Aqueous white dispersion
Odor: Trace characteristic odor
pH: 10.5 - 12
Solubility: DISPERSABLE in water phase
Suggested percentage: 1 to 10% (TINOSORB M is approved as UV filter on part I of Annex VII of the European Cosmetics Directive 76/768/EEC in concentration up to 10%)

 UV Properties
Max:  305 and 360 nm (in water)
E (1 %, 1 cm): 480 (in water, 360nm)
Critical wavelength: 388 nm
UV-A / UV-B ratio: 1,0

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

  1. El-Boury, S., Couteau, C., Boulande, L., Paparis, E. and Coiffard, L. (2007). Effect of the combination of organic and inorganic filters on the Sun Protection Factor (SPF) determined by in vitro method. [online] Available at: [Accessed 28 Apr. 2017].
  2. (2017). TINOSORB® M | BASF's Care Creations. [online] Available at: [Accessed 19 Apr. 2017].
  3. Chatelain, E. and Gabard, B. (2007). Photostabilization of Butyl methoxydibenzoylmethane (Avobenzone) and Ethylhexyl methoxycinnamate by Bis-ethylhexyloxyphenol methoxyphenyl triazine (Tinosorb S), a New UV Broadband Filter. Photochemistry and Photobiology, 74(3), pp.401-406.
  4. 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.
  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. 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.
  7. (2017). TINOSORB® S | BASF's Care Creations. [online] Available at: [Accessed 19 Apr. 2017].
  8. Google Books. (2017). Patent WO2015116899A1 - Oil-in -water emulsion sunscreen composition. [online] Available at: [Accessed 28 Apr. 2017].
  9. (2017). TINOSORB® S AQUA | BASF's Care Creations. [online] Available at: [Accessed 19 Apr. 2017].
  10. CIBA Chemicals - Tinosorb S Broad Spectrum UV absorber datasheet
  11. 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 [Accessed 19 Apr. 2017].

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