Food and Drug Regulations

B.06.053 [S]. Citrus Red. No. 2 shall be 1-(2,5-dimethoxyphenylazo)-2-naphthol, shall contain not less than 98 per cent dye, as determined by official method FO-7, and may contain not more than

• (a) 0.5 per cent volatile matter (at 100°C), as determined by official method FO-12;

• (b) 0.3 per cent sulphated ash, as determined by official method FO-13;

• (c) 0.3 per cent water soluble matter, as determined by official method FO-14;

• (d) 0.5 per cent carbon tetrachloride insoluble matter, as determined by official method FO-15;

• (e) 0.05 per cent uncombined intermediates; and

• (f) 2.0 per cent subsidiary dyes.