Bisoctrizole
Title: Bisoctrizole
CAS Registry Number: 103597-45-1
CAS Name: 2,2¢-Methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol]
Additional Names: MBBT
Trademarks: Tinosorb M (Ciba); Tinuvin 360 (Ciba)
Molecular Formula: C41H50N6O2
Molecular Weight: 658.87
Percent Composition: C 74.74%, H 7.65%, N 12.76%, O 4.86%
Literature References: UV-A filter with dual mechanism of action. Photostable organic molecule with broad UV absorption; microfine structure causes light scattering and reflection. Prepn and use in light stabilizer formulations: N. Kubota, A. Nishimura, EP 180992; eidem, US 4681905 (1986, 1987 both to Adeka Argus). Light stabilization of polymers: G. Rytz et al., Angew. Makromol. Chem. 247, 213 (1997). Skin photoprotection study: C. Gélis et al., Photodermatol. Photoimmunol. Photomed. 19, 242 (2003). HPLC determn in suncare formulations: C. G. Smyrniotakis, H. A. Archontaki, J. Chromatogr. A 1031, 319 (2004). UV attenuating properties of microparticles: B. Herzog et al., J. Colloid Interface Sci. 276, 354 (2004).
Properties: Slightly yellow powder, mp 195°. Flash pt: >200°C. d20 1.2. Vapor pressure (25°): 6´10-13 Pa. Soly at 20° (%w/w): water < 0.001; acetone 0.05; chloroform 100; n-hexane 0.03; methylene chloride 75; toluene 34. Absorption max (chloroform): 308, 349 nm (e 31895). Absorption max (n-heptane): 348 nm (e 31600).
Melting point: mp 195°
Flash point: Flash pt: >200°C
Absorption maximum: Absorption max (chloroform): 308, 349 nm (e 31895); Absorption max (n-heptane): 348 nm (e 31600)
Density: d20 1.2
Use: Light stabilizer in polymers and resins.
Therap-Cat: Ultraviolet screen.
Keywords: Ultraviolet Screen.

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