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a. ALCOHOL EXTRACT, COLORED ORANGE, YELLOW, OR BROWN. 



Take up a portion of the residue with dilute sulphuric acid and shake with ether. 



(1) Ether dissolves some of the coloring matter: 



Natural coloring matter 



Annatto. 



Turmeric. 



Saffron. 



Carotin. 

 Nonsulphonated acid coal-tar colors, such as 



Anilin yellow. 



Butter yellow. 



Victoria yellow. 



Martius yellow. 



(2) Ether does not dissolve the coloring matter: 



Basic coal-tar colors, such as 



Phosphin. 

 Sulphonated coal-tar colors, such as 



Acid yellow. 



Methyl orange. f 



Orange IV. 



b. WATER EXTRACT FROM THE FAT. 

 Note the color and apply various reagents to the dry residue. 



