BACK TO FOOD COLORS

COMMON NAME                                                 :            PONCEAU 4R  

SYNONYMS                                                           :            (A)   C.I.  FOOD RED 7

                                                                                                (B)  CHERRY  RED

C. I. NUMBER                                                        :             16255

CHEMICAL NAME                                                :             TRISODIUM SALT OF 1-(4-SULPHONAPHYTHYLAZO)  

                                                                                                  2 -HYDROXY NAPHTHALENE-6:8-

                                                                                                 DISULPHONIC ACID)

EMPIRICAL FORMULA                                       :            C20 H11 N2 O10 S3 NA3

MOLECULAR WEIGHT                                        :             604.5

SOLUBILITY  (WATER)                                       :             140 GMS PER LITRE

FASTNESS PROPERTIES                                

LIGHT                                                                        :            GOOD (WATER)

HEAT                                                                          :             VERY GOOD (UP TO 1050 C)

                                                                                                   GOOD (UP TO 205 0C)

FRUIT ACIDS                                                           :             GOOD

BENZOIC ACID                                                       :            GOOD

SULPHUR DIOXIDE                                               :             FAIR

ALKALIES                                                                :            GOOD