Eosin yellowish, C.I. 45380, for microscopy

- Synonyms: 2',4',5',7'-Tetrabromofluorescein, Eosin Y - C20H6Br4Na2O5 - M = 691,86 g/mol - CAS [17372-87-1] - EINECS-No.: 241-409-6 - Solub. in water: (20 ºC): 300 g/l - LD 50 (oral, rat): 4700 mg/kg - GHS-signal word: Warning - GHS-H sentences: H302 - H312 - H332 - GHS-P sentences: P261 - P280 - P321 - P301+P312 - P304+P340 - P501a - Tariff number: 3204 12 00 90 - Applications: analytical chemistry, indicator, for spectrophotometric determinations (for determination of: silver), for biology, microscopy. SPECIFICATIONS assay (gravimetric): min. 88 % Absorption maximum l (in H2O): 515 - 518 nm Absorptivity (A1%/1 cm; 0,0005 % l max, H2O): 1200 - 1400 related substances (TLC): passes test suitability for microscopy: passes test loss on drying (110 ºC): max. 8 %