Pigment Fast Yellow

Metal complexes of tetradentate azomethines, e.g. (199), are reported136 to have very high light-fastness but to be tinctorially weak and dull in hue. Despite this they are of technical interest as very fast yellow to brown pigments. They find no application as dyestuffs, however, because of these deficiencies for example, the chromium complex of (200) gives dull, tinctorially weak dyeings on wool possessing poor wet-fastness properties. 

TARTRAZINE XX TARTRAZINE XXX TARTRAZINE YELLOW TARTRAZOL BPC T.ARTRAZOL YELLOW TARTRINE YELLOW O TRISODIUM 3-CARBOXY-S-HA DROXY-l-p-SULFOPHENYL-4-p-SULFOPHENYLAZOPYRAZOLE TRISODIUM SALT of 3-CARBOXY-5-HYDROXY-1-SULFOPHENYLAZOPY-RAZOLE UNITERTRACID YELLOW TE USACERT YELLOW NO. 5 VONDACID TARTRAZINE WOOL YELLOW XYLENE FAST YELLOW GT Y-4 1310 YELLOW 1409 YELLOW YELLOW LAKE 69 YELLOW NO. 5 YELLOW NO. 5 FDC ZLUT KYSELA 23 ZLUT PIGMENT 100 ZLUT POTRAVINARSKA 4... 

Use Light-fast yellow pigment intermediate diazo coupler. 

AtuI Vulcan Fast Pigment Oil Yellow T 872 Aviosulfon 1054... 

Uses Colorant/pigment for plastics, paints/coatings Trade Names Fanchon Fast Yellow Y-5700... 

The first isoindoline pigment appeared on the German market in 1973 Lithol Fast Yellow 1840 (P.Y. 139), manufactured by BASF. 

Only after o-phthalodinitrile became available in high purity on an industrial scale from BASF the importance of these pigments was recognized. By improving the methods of synthesis and finishing it became possible to produce pigments with brilliant hues and better fastness properties. In 1973 BASF released the first isoindoline pigment into the market Lithol Fast Yellow 1840 (P.Y. 139). At the same time several other companies (Bayer, Ciba, Dainippon Ink) published novel isoindoline structures [8- 11]. 

---