We are offering rhodamine b ar for microscopy c.i.no.45170 100 gm c28h31cln2o3 m.w. 479.02 absorptivity (a 1%1cm; l = 555 nm ph 7, on dried substances) min. 2100 loss on drying (1050c) max. 5% suitability for microscopy passes test (for colorimetric determination of cd absorption indicator for microscopy) cas no: 81-88-9 un no. Nr tariff : 3204 13 42 r : 22-41 s : 26-39