We are offering light green for microscopy mol. Formula :- c37h34n2na2o9s3 mol. Weight :- 792.86 cas no. 5141-20-8 sr no. tests specifications 1 description green powder 2 dye content min. 80% (by titanometry) 3 absorption ( in water ) 629-634 nm 4 tlc test passes test 5 loss on drying (1100c) max