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Red No.405
| Legal color： | Red No.405 |
| General name： | Parmanent Red F5R | | Class： | Pigment |
| FDA： |
| CI #： | C.I. 15865 |
| Color #： | Pig. Red 48 |
| CAS #： | 3564-21-4 |
| CAS： | 2-Naphthalenecarboxylic acid,4-[(5-chloro-4-methyl-2-sulfophenyl)azo]-3-hydroxy-,disodium salt |
| IUPAC： | →1;Calcium bis[2-(3-carboxy-2-hydroxynaphthylazo)-4-chloro-5-methylbenzenesulfonate]
→2;2-(3-Carboxy-2-hydroxynaphthylazo)-4-chloro-5-methylbenzenesulfonic acid calcium salt (2:1) |
| Chemical structure： |  
Parmanent Red F5R |
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