Eriochrome blue SE, C.I. 16680, indicator for metal titration

- Synonyms: 2-(4-Chloro-1-hydroxyphenyl-2-azo)-1,8-dihydroxynaphthalene-3,6-disulfonic acid disodium saltr- C16H9ClN2Na2O9S2 r- M = 518,82 g/molr- CAS [1058-92-0]r- EINECS-No.: 213-894-4r- Solub. in water: (20 ºC): ~ 30 g/lr- LD 50 (oral, rat): 8900 mg/kgr- Tariff number: 3204 19 00 90r- Applications: analytical chemistry, indicator (metals), in biochemistry.rrSPECIFICATIONSrAbsorption maximum l1 (methanol): 526 - 530 nmrAbsorption maximum l2 (methanol): 552 - 556 nmrAbsorptivity (A1%/1 cm; l1 max) : min. 320rAbsorptivity (A1%/1 cm; l2 max) : min. 320rloss on drying (110 ºC): max. 7 % rsuitability as metal indicator: passes testr