Name | Food Yellow 4:1 |
Synonyms | KI4 C.I. Pigment Yellow 100 Tartrazine alaminium lake C.I. Acid Yellow 23-aluminum lake 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-((4-sulfophenyl)azo)- aluminum salt aluminum tris(4-{(E)-[3-carboxy-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}benzenesulfonate) |
CAS | 12225-21-7 |
EINECS | 235-428-9 |
InChI | InChI=1/3C16H12N4O9S2.Al/c3*21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;/h3*1-8,13H,(H,22,23)(H,24,25,26)(H,27,28,29);/q;;;+3/p-3/b3*18-17+ |
Molecular Formula | C16H9N4O9S2.3Na |
Molar Mass | 534.368 |
Density | 0.341[at 20℃] |
Water Solubility | 561.286mg/L at 30℃ |
Solubility | 600mg/L in organic solvents at 20 ℃ |
pKa | 0[at 20 ℃] |
Storage Condition | Room Temprature |
Physical and Chemical Properties | solubility: slightly soluble in ethanol and Fibrinolysin; Yellow solution in concentrated sulfuric acid, diluted yellow solution, yellow in concentrated nitric acid; Water solution with hydrochloric acid does not change, the concentrated alkali was red and yellow. hue or shade: Green Yellow relative density: 1.78-1.87 Bulk density/(lb/gal):14.8-15.5 oil absorption/(g/100g):33-43 hiding power: transparent reflection curve: |
Use | There are 31 types of this product. Given the green light yellow, low coloring strength, alkali and soap resistance performance is poor, only medium baking stability, light fastness is low, little industrial importance. Mainly used in food and medicine and cosmetics coloring, namely food Yellow 5 (FD & D Yellow No 5), occasionally also as a decorative paint, nitrocellulose solvent printing ink and packaging ink and other coloring. |
Reference Show more | 1. [IF=10.588] Chaofan Zheng et al."Modified magnetic chitosan microparticles as novel superior adsorbents with huge “force field” for capturing food dyes."J Hazard Mater. 2019 Apr;367:492 |