GREEN S
Prepared at the 28th JECFA (1984), published in FNP 31/1 (1984) and in FNP 52 (1992). Metals and arsenic specifications revised at the 59th
JECFA (2002). No ADI was allocated at the 18th JECFA (1974).
SYNONYMS CI Food Green 4, Food Green S, CI (1975) No. 44090, INS No. 142
DEFINITION Consists essentially of sodium N-[4-[[4-(dimethylamino)phenyl](2-hydroxy-3,6-disulfo-1-naphthalenyl)-methylene]-2,5-cyclohexadien-1-
ylidene]-N-methylmethanaminium and subsidiary colouring matters together with sodium chloride and/or sodium sulfate as the principal uncoloured compounds.
May be converted to the corresponding aluminium lake, in which case only the General Specifications for Aluminium Lakes.
Chemical names Sodium N-[4-[[4-(dimethylamino)phenyl](2-hydroxy-3,6-disulfo-1-naphtalenyl)-methylene]-2,5-cyclohexadien-1-ylidene]-N-methylmethanaminium; Sodium 5-[4-dimethylamino-I-(4-dimethyliminiocyclohexa-2,5-dienylidene) benzyl]-6-hydroxy-7-sulfonato-naphthalene-2-sulfonate (alternative chemical name)
C.A.S. number 860-22-0
Chemical formula C27H25N2NaO7S2
Formula weight 576.63
Assay Not less than 80% total colouring matter
DESCRIPTION Dark green powder or granules
FUNCTIONAL USES Colour
