For negative staining of bacteria. With Basic Fuchsin, staining bacteria spores. (Acid Black 2; Gray R, B, BB; Indulin Black; Nigrosin W, WL ; Silver Gray; Steel Gray) CAS #: 8005-03-06 Solubility: 10.0% Water; 0.0% Alcohol; 1.0% Cellosolve; 11.0% Glycol; 0.0% Xylene