- Synonyms: 1,10-Phenanthroline iron (II) salt, Tris(1,10-phenanthroline) iron (II) sulfate - C36H24FeN6O4S - M = 692,53 g/mol - CAS [14634-91-4] - EINECS-No.: 238-676-6 - Density: 1,01 g/cm3 - EC-Index-No.: 613-092-00-8 - GHS-H sentences: H413 - GHS-P sentences: P273 - P501a - Tariff number: 2933 99 80 00 - Applications: analytical chemistry, indicator, for determination of: metals (i.a.: nickel, silver). SPECIFICATIONS Absorptivity (A 1 %/1 cm; 510 nm; pH= 7,0): 260 - 300 suitability as redox indicator : passes test