1,10 Phenanthroline monohydrate  5144-89-8

CAS no. : 5144-89-8

Molecular formula: C12H8N2.H2O

Molecular weight: 198.22

Molecular structure:

1, 10 phenanthroline

Dangerous goods mark :TN description

Risk terms: R25; R50/53; instructions

Security terms: S45; S60; S61

Main application: to generate orange complex complex between o-phenanthroline and ferrous ion at PH4~5, and then to determine iron content by spectrophotometry.

Physical and chemical properties: hydrate is a white crystalline powder. Melting point is 93-94℃, the melting point of anhydrous substances is 117℃, soluble in 300 parts water, 70 parts benzene, soluble in alcohol and acetone.

It can form complexes with various transition metals. The complexes formed are chelates, so they are relatively stable. The complexes and derivatives formed with copper have certain cutting activity on DNA and can be used as non-oxidizing nucleic acid cutting enzyme, which has certain anticancer activity. Properties: when recrystallized with water, it contains one molecule of crystal water. 91.5 ℃ melting point (102 ℃). When using benzene recrystallization, does not contain water of crystallization, melting point 98 ~ 100℃(117℃). Boiling point above 360℃. Soluble in ethanol, benzene, acetone, insoluble in petroleum ether. It forms complexes with iron, copper, cobalt, nickel and 2,2 '-dipyridines, and forms red complexes with Fe2+. 2,2' -dipyridinyl -3,3 '-dicarboxylic acid by potassium permanganate oxidation. It can be used as a quantitative colorimetric reagent for copper and iron and as an indicator for titration of iron salt with cerium sulfate. It can also be used as dyes for animal fibers.

In the solution of pH = 2 ~ 9, adjacent to the two nitrogen fe and 2 ferrous ion valence (Fe2 +) chromogenic reaction, high selectivity of the reaction, and the generated orange-red complex is very stable, lgK = 21.3 (20 ℃), its solution at 510 nm (visible light) have the largest absorption peak, using the color reaction, can use the visible spectrophotometric method of determination of trace iron.

Although the appropriate pH value range of the chromogenic reaction is wide (pH=2~9), the determination is usually conducted in hoac-naoac buffer medium with pH=5.