The Collaborative International Dictionary of English v.0.48:

Safranin \Saf"ra*nin\, n. (Chem.)
   (a) An orange-red dyestuff extracted from the saffron. [R.]
   (b) A red dyestuff extracted from the safflower, and formerly
       used in dyeing wool, silk, and cotton pink and scarlet;
       -- called also Spanish red, China lake, and
       carthamin.
   (c) An orange-red dyestuff prepared from certain nitro
       compounds of creosol, and used as a substitute for the
       safflower dye.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Carthamin \Car"tha*min\, n. (Chem.)
   A red coloring matter obtained from the safflower, or
   Carthamus tinctorius.
   [1913 Webster] carthorse