As nouns the difference between dyestuff and thionine
is that dyestuff is any soluble pigment used for dyeing the hair, fabric etc while thionine is an artificial red or violet dyestuff consisting of a complex sulfur derivative of certain aromatic diamines.
dyestuff
English
Noun
(
en noun)
any soluble pigment used for dyeing the hair, fabric etc
thionine
English
Noun
(-)
(chemistry) An artificial red or violet dyestuff consisting of a complex sulfur derivative of certain aromatic diamines.