chromogen

/kroh-muh-juhn, -jen/US // ˈkroʊ mə dʒən, -ˌdʒɛn //UK // (ˈkrəʊmədʒən) //

色素,致色剂,变色剂,色素剂

Definitions

n.名词 noun

1
- : Chemistry. any substance found in organic fluids that forms colored compounds when oxidized.a colored compound that, though not a dye itself, can be converted into a dye.
- : a chromogenic bacterium.

In other words, an auxochrome in addition to the chromophore group transforms a colorless chromogen into a colored one.
The chromogen or pigmentary bacteria have occasionally been the means of working miracles.
A colorless chromogen is formed, which oxidizes to the green pigment in the air.