LITHOL RUBINE BK
Prepared at the 30th JECFA (1986), published in FNP 37 (1986) and in FNP 52 (1992). Metals and arsenic specifications revised at the 59th
JECFA (2002). No ADI was allocated at the 30th JECFA (1987)
SYNONYMS CI Pigment Red 57, FD & C Red No. 7, Brilliant Carmine 6B, Rubinpigment, Carmine 6B, Litholrubintoner BKL, Permanent Rubin L6B,
CI (1975) No. 15850, INS No. 180
DEFINITION Consists essentially of calcium 3-hydroxy-4-(4-methyl-2-sulfonatophenylazo)-2-naphthalenecarboxylate and subsidiary colouring
matters together with water, calcium chloride and/or calcium sulfate as the principal uncoloured components.
Chemical names Calcium 3-hydroxy-4-(4-methyl-2-sulfonatophenylazo)-2-naphthalenecarboxylate
C.A.S. number 5284-04-9
Chemical formula C18H12CaN2O6S
Formula weight 424.45
Assay Not less than 90% total colouring matter
DESCRIPTION Red powder
FUNCTIONAL USES Colour
