Yellow dye number 5 is considered dangerous for human consumption. It has been proven that yellow dye number 5 is carcinogenic.
I'm assuming you were trying to ask the question, "How do I make yellow dye?", because there's no such thing as yellow food dye in runescape--you can't dye the food in there. Two onions and 5 coins, given to the witch Aggie in Draynor, will produce yellow dye.
Have you tried tartrazine dye (FD&C Yellow 5).
To make orange dye, get 3 onions, and 5 coins for yellow dye. then get 3 redberries, and another five coins for red dye. go to the witch in draynor village and make the dyes, then mix the yellow and red dyes
yellow stool dye #5
Gorbet Shuo
Go to the witch in Draynor Village near the bank, and ask her to make you dyes. Tell her what dye you want and she will tell you she needs ingredients and 5 gp to make the desired dye.
It is possible that the dye in mac and cheese is dangerous to your health. Yellow No. 5 has been connected to hyperactivity, asthma, some skin conditions and cancer. There have been no large scale studies that prove this, however.
Yellow 5 does not contain oil from pigs. It is a purely synthetic chemical used for food colouring. Its chemical formula is C16H9N4Na3O9S2 . For more information see Wikipedia: http://en.wikipedia.org/wiki/Tartrazine
She loves: her fans, chocolate, her family, Dr Pepper and her boyfriend more than anything else.
Mason Dye is 5' 8".
Rich Dye is 5' 9".