Description
Chemical Name:CHROMOTROPIC ACID DISODIUM SALT DIHYDRATE
Cas No:5808-22-0
Synonyms:Chromotropic acid disodium salt dihydrate;
Molecular Weight:362.3
Molecular Formula:C10H11NaO9S2
Molecular Structure:
Specification:
Items | Specifications |
Melting point | >300 °C |
Boiling point | / |
Moisture(%) | / |
Fp | 164℃ |
PH | 3.6 |
Density | 780kg/m3 |
Appearance | White powder |
Water solubility | Soluble in water |
Function:
Redox function: During the color development process, CD-4 can undergo redox reaction with the exposed silver halide on the color film. The silver halide is reduced to silver, while CD-4 itself is oxidized, and its oxidation product will react with the color coupler to generate dyes, which convert the latent image on the film into a visible color image.
Color generation function: By combining with different color couplers, CD-4 can generate three basic colors: cyan, magenta, and yellow, which are then mixed to form a variety of rich colors, and finally form a complete color image on the film.
Application:
Photography: It is an indispensable chemical reagent in color photography and is widely used in the development process of color film and photographic paper. It can convert the exposed silver halide on the film or photographic paper into color images, so that the filmed scenes and characters can be presented in color.
Film production: In the process of film washing and production, CD-4 is used to develop the film in color, giving rich colors to the film images, which plays a key role in the visual effects of the film.
