Green S

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Green S
Green S sodium.png
Green S ball-and-stick.png
Identifiers
CAS number 3087-16-9 YesY
PubChem 91525
ChemSpider 82646 YesY
Jmol-3D images Image 1
Properties
Molecular formula C27H25N2NaO7S2
Molar mass 576.62 g/mol
Melting point 210°C (decomposes)[1]
Hazards
R-phrases R22
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references

Green S is a green synthetic coal tar triarylmethane dye with the molecular formula C27H25N2O7S2Na.

As a food dye, it has E number E142. It can be used in mint sauce, desserts, gravy granules, sweets, ice creams, and tinned peas. Green S is prohibited as a food additive in Canada, United States, Japan, and Norway.[citation needed] It is approved for use as a food additive in the EU[2] and Australia and New Zealand. [3]

Green S is a vital dye, meaning it can be used to stain living cells. It is used in ophthalmology, among fluorescein and rose bengal, to diagnose various disorders of the eye's surface.

Green S may cause allergic reactions and is one of the colorants that the Hyperactive Children's Support Group recommends to be eliminated from the diet of children.

References[edit]


Eighteenth Report of the Joint FAO/WHO Expert Committee on Food Additives (JECFA), Wld Hlth Org. techn. Rep. Ser., 1974, No. 557. FAO Nutrition Meetings Report Series, 1974, No. 54. Presented in [1]