Description
Methylene Bis-Benzotriazolyl Tetramethylbutylphenol (nano) is an organic compound of the family of benzotriazole derivatives, presented in nanostructured form.
Under Regulation (EC) No 1223/2009, the ingredient is listed in Annex VI, reference 23a, which covers authorized UV filters. The maximum permitted concentration in the finished cosmetic product is "10 %(*)", on the understanding that "In case of combined use of Methylene Bis-Benzotriazolyl Tetramethylbutylphenol and Methylene Bis-Benzotriazolyl Tetramethylbutylphenol (nano), the sum shall not exceed the limit given in column g". Specific conditions are established: "Not to be used in applications that may lead to exposure of the end user's lungs by inhalation". Only nanomaterials with "Purity ≥ 98,5 %, with 2,2′-methylene-bis-(6(2H-benzotriazol-2-yl)-4-(isooctyl)phenol) isomer fraction not exceeding 1,5 %; Solubility < 5 ng/L in water at 25 °C; Partition coefficient (Log Pow): 12,7 at 25 °C; Uncoated; Median particle size D50 (50 % of the number below this diameter): ≥ 120 nm of mass distribution and/or ≥ 60 nm of number size distribution" are admitted. The ingredient is not classified as CMR.
The nanostructured form requires specific control of the physicochemical characteristics of the raw material defined in the authorization. The information presented is for technical reference only and does not constitute a recommendation for use or an efficacy claim.