Chromatium
| Chromatium | |
|---|---|
| Scientific classification | |
| Domain: | Bacteria | 
| Kingdom: | Pseudomonadati | 
| Phylum: | Pseudomonadota | 
| Class: | Gammaproteobacteria | 
| Order: | Chromatiales | 
| Family: | Chromatiaceae | 
| Genus: | Chromatium Perty 1852 | 
| Type species | |
| Chromatium okenii | |
| Species | |
| C. buderi  | |
Chromatium is a genus of photoautotrophic Gram-negative bacteria which are found in water. The cells are straight rod-shaped or slightly curved. They belong to the purple sulfur bacteria and oxidize sulfide to produce sulfur which is deposited in intracellular granules of the cytoplasm.