It creates a brownish liquid that makes an azo dye called Para Red when it is combined with a bright yellow mixture created from para-nitroaniline/HCl/sodium nitrite. So the reaction that you are talking about basically makes a brownish dye.
used of para nitro acet anilide
mix red and blue dye Red dye- redberries blue dye- woad leaves
Azo food dyes don't set off allergic reactions as such, though some azo textile dyes can cause your skin to be hypersensitive. The mechanism for why tartrazine increases allergic reactions is not yet known.
use a red dye on a yellow dye to get orange dye
an orane red dye in a normal form of dye but just different names
rose red dye and bonemeal
bleach the red dye out.
You get red dye by smelting red mushrooms.
can you have anything with red dye while pregnant?
Orange dye is made by combining a yellow dye and a red dye.
Add white to the red.