Green S 3250931 212314754 2008-05-14T09:30:48Z Panfily 6970830 [[Image:Green S.png|thumb|right|200px|Green S]] '''Green S''', '''Greens S''', '''Food Green S''', '''FD&C Green 4''', '''Acid green 50''', '''Lissamine Green B''', '''Wool Green S''', or '''C.I. 44090''', is a green synthetic [[coal tar]] triarylmethane [[dye]], C<sub>27</sub>H<sub>25</sub>N<sub>2</sub>O<sub>7</sub>S<sub>2</sub>Na, usually a monosodium salt. As a [[food dye]], it has [[E number]] E142. It can be used in [[mint sauce]], [[dessert]]s, [[gravy]] granules, [[sweets]], [[ice cream]]s, and tinned [[pea]]s. Greens S is prohibited as a food additive in [[Canada]], [[United States]], [[Japan]], and [[Norway]]. It may cause allergic reactions. It is one of the colourants that the [[Hyperactive Children's Support Group]] recommends be eliminated from the diet of children. It is a [[vital dye]], meaning it can be used to [[staining (biology)|stain]] living [[cell (biology)|cells]]. It is used in [[ophthalmology]], among [[fluorescein]] and [[rose bengal]], to diagnose various disorders of the eye's surface. {{SMILESCAS|CAS=3087-16-9|SMILES=[Na+].CN(C)c1ccc(cc1)C(=C2C=CC(C=C2)=[N+](C)C)c3c(O)c(OS([O-])=O)cc4cc(OS([O-])=O)ccc34}} Its risk and safety phrases are {{R22}}. [[Category:Triarylmethane dyes]] [[Category:Food colorings]] [[Category:Vital stains]] {{org-chem-stub}} [[de:Grün S]] [[ru:Зелёный S]] [[it:Verde S]] [[hu:Greens S]] [[nl:Briljantzuurgroen BS]]