Title: Ecamsule
CAS Registry Number: 92761-26-7
CAS Name: 3,3¢-(1,4-Phenylenedimethylidyne)bis[7,7-dimethyl-2-oxo-bicyclo[2.2.1]heptane-1-methanesulfonic acid]
Additional Names: terephthalylidene-3,3¢-dicamphor-10,10¢-disulfonic acid
Trademarks: Mexoryl SX (L'Oreal)
Molecular Formula: C28H34O8S2
Molecular Weight: 562.69
Percent Composition: C 59.77%, H 6.09%, O 22.75%, S 11.40%
Literature References: Broad spectrum UVA absorber with some UVB absorption. Prepn: G. Lang et al., DE 3321679; eidem, US 4585597 (1983, 1986 both to L'Oreal). Evaluation of photomutagenicity: S.W. Dean et al., Mutagenesis 7, 179 (1992). Evaluation of photoprotection: A. Fourtanier et al., Photochem. Photobiol. 55, 549 (1992); R. D. Ley, A. Fourtanier, ibid. 65, 1007 (1997).
Properties: Solid, mp 255° (dec). uv max (ethanol): 345 nm (e 47000 M-1cm-1); uv max (water): 342 nm (e 42300).
Melting point: mp 255° (dec)
Absorption maximum: uv max (ethanol): 345 nm (e 47000 M-1cm-1); uv max (water): 342 nm (e 42300)
Therap-Cat: Ultraviolet screen.
Keywords: Ultraviolet Screen. |