Tables Relating to Stains 



289 



Table 6. Dye Solubilities at 26°C. (Purified Samples). 



Based on data obtained by Holmes {1927» 1928, 1929). 



Note : With a few exceptions (the iodides, the magnesium and calcium salts) these 

 figures are for commercial dyes recrystalized from water or aqueous-alcoholic 

 mixtures Commercial dyes are often considerably less soluble; see Table 7. . 



tThe color acids of these dyes (not listed here) are practically insoluble in water. 



