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Red No.203
| Legal color: | Red No.203 | | General name: | Lake Red C | | Class: | Pigment | | FDA : | (D & C Red No.8) | | CI #: | C.I. 15585 | | Color #: | Pig. Red 53 | | CAS #: | 2092-56-0 | | CAS : | Benzenesulfonic acid,5-chloro-2-[(2-hydroxy-1-naphthalenyl)azo]-4-methyl-, monosodium salt | | IUPAC: | →1;Sodium 5-chloro-4-methyl-2-(2-hydroxynaphthylazo)benzenesulfonate
→2;5-Chloro-4-methyl-2-(2-hydroxynaphthylazo)benzenesulfonic acid sodium salt |
| Chemical structure : |  
Lake Red C |
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