3-mercaptopropionic acid transportation and storage methods is a kind of bipyridine, can be used as an analytical reagent for the detection of ferrous, silver, cadmium, molybdenum; As a REDOX indicator. White or light red crystalline powder, soluble in alcohol, ether, benzene, trichloromethane and petroleum ether; Dissolved in water, the solution appears red in the presence of ferrous salts. Melting point range: 70-72°C; Moisture: 0.50%; Free chlorine: 0.001%; Sulfate: 0.005%; Heavy metals: 0.005%.

1. Its appearance is white or light pink crystalline powder.

2. Easily soluble in ethanol, ether, benzene, trichloromethane, petroleum ether, soluble in about 200 parts of water, the solution is red when it encounters ferrite salt.

3. Melting point 69.7℃; Boiling point 272 ~ 273℃.

4.LD50 mouse intraperitoneal injection: 200mg/kg.

2,2' -bipyridine is one of the isomers of bipyridine, colorless solid. It is a digentate chelating ligand and can form complexes with many metal ions, so it can be used as a REDOX indicator. Complexes with ruthenium and platinum have strong luminescence properties and may have potential applications. Its derivatives can be obtained by dehydrogenation of pyridine with Raney nickel.

Common 2,2' -bipyridine complexes include:

Mo(CO)4(bipy), similar to Mo(CO)6; RuCl2(bipy)2, a synthetic precursor; [Ru(bipy)3]Cl2, a commonly used luminescent substance; [Fe(bipy)3], used for colorimetric analysis of ferrous ions. The general formula for complexes of type three (bipy) is [M(bipy)3] (M= metal ions: Cr, Fe, Co, Ru, Rh, etc.), and the atoms are octahedral hexadentates with two enantiomers:

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