pink salt

from The Collaborative International Dictionary of English v.0.48

Pink \Pink\, a.
   Resembling the garden pink in color; of the color called pink
   (see 6th {Pink}, 2); as, a pink dress; pink ribbons.
   [1913 Webster]

   {Pink eye} (Med.), a popular name for an epidemic variety of
      ophthalmia, associated with early and marked redness of
      the eyeball.

   {Pink salt} (Chem. & Dyeing), the double chlorides of
      (stannic) tin and ammonium, formerly much used as a
      mordant for madder and cochineal.

   {Pink saucer}, a small saucer, the inner surface of which is
      covered with a pink pigment.
      [1913 Webster]