Methylene Blue Zinc free CAS NO.61-73-4

Offering methylene blue zinc free Cas no: 61-73-4 . We are the manufacturers of methylene blue zinc free which passes in IP, BP, EP,Methylene Blue is also used as a biological stain . The other name of Methylene Blue Zinc free is Basic Blue 9. Methylene Blue is a basic dye.Methylene Blue also goes in printing ink. The USP  norms are as uneder : - The specifications are as under :                               1. Product:                     Methylene blue                                                                                                                                                               2. CI no:                         52015                                                                                                                                                                           3. Appearance :             Dark green crystalline powder                                                                                                                                      4. Assay (as is basis) :  80 % - 85%                                                                                                                                                                   5. Assay (on dry basis):98% -101%                                                                                                                                                                    6. Loss on drying :        10% -20%                                                                                                                                                                      7. Solubility :                 Clear blue solution                                                                                                                                                         8. Ash content :            1.2% max                                                                                                                                                                       9. Residual solvent :     Nil                                                                                                                                                                                10.Heavy Metals :         Passes Test                                                                                                                                                       11. Zinc :                      <100ppm max                                                                                                                                                              12. Absorptivity : 1%, 1cm, at max 663.0nm : 2200 to 2750.