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COMMON NAME                                                 : TARTRAZINE

SYNONYMS                                                           : (A) FD & YELLOW 5

                                                                                                                (B) C.I.FOOD YELLOW 4                                                                                                                 (C) LEMON YELLOW                                                                                                                 (D) ACID YELLOW23

C. I. NUMBER                                                                     :   19140

CHEMICAL NAME                                                        :   TRISODIUM SALT OF 4-(4-SULPHO-1 PHENYLAZO)                                                                                                                  -1-(4-SULPHOPHENY)-5-HYDROXY PYRAZOL-3-                                                                                                                   CARBROXYLIC ACID.

EMPIRICAL FORMULA                                                                            :                              C16 H9 N4 O9 S2 NA3

MOLECULAR WEIGHT                                                :                                                                                      534.4

SOLUBILITY :

WATER                                                                                                -140GMS PER LITRE.

FASTNESS PROPERITES                                :

LIGHT                                                : VERY GOOD (IN WATER)

HEAT                                                : EXCELLENT (UPTO 1050 c)

                                                                                              VERY GOOD (UPTO 2050 c)

FRUIT ACIDS                                                : EXCELLENT

BENZONIC ACID                                                : EXCELLENT

SULPHUR DIOXIDE                                                : EXCELLENT

ALKALIES                                          : GOOD (BECOMES REDDER)