Congo red dye is a synthetic reactive water soluble dye:
� used in medicine (as a biological stain)
� and as an indicator since it turns from red-brown (in basic medium) to blue in acidic one.
� It is also used to color textiles (initially cotton).
� It could also be used as a gamma-ray dosimeter since its coloration decays with the intensity of the irradiation [E-Journal of Chemistry, http://www.e-journals.net Vol. 5, No.3, pp. 572-576, July 2008].
It is carcinogenic [Adsorptive removal of Congo red, a carcinogenic textile dye by chitosan. hydrobeads: Binding mechanism, equilibrium and kinetics, Colloids and Surfaces A: Physicochem. Eng. Aspects 299 (2007) 146 152].
Congo red contains an azo (-N=N-) chromophore and an acidic auxochrome (sulfonate : -SO3H) (which, respectively, gives and reinforces the coloration) associated with the benzene structure. Congo red is a the sodium salt of a derivative of benzidine and naphthionic acid.
About the formula, See Congo-red-2D-skeletal.png in wikipedia.
See also Encyclopaedia Britannica.
Congo red dye is a synthetic reactive water soluble dye:
¤ used in medicine (as a biological stain)
¤ and as an indicator since it turns from red-brown (in basic medium) to blue in acidic one.
¤ It is also used to color textiles (initially cotton).
¤ It could also be used as a gamma-ray dosimeter since its coloration decays with the intensity of the irradiation [E-Journal of Chemistry, http://www.e-journals.net Vol. 5, No.3, pp. 572-576, July 2008].
It is carcinogenic [Adsorptive removal of Congo red, a carcinogenic textile dye by chitosan. hydrobeads: Binding mechanism, equilibrium and kinetics, Colloids and Surfaces A: Physicochem. Eng. Aspects 299 (2007) 146-152].
Congo red contains an azo (-N=N-) chromophore and an acidic auxochrome (sulfonate : -SO3H) (which, respectively, gives and reinforces the coloration) associated with the benzene structure. Congo red is a the sodium salt of a derivative of benzidine and naphthionic acid.
About the formula, See Congo-red-2D-skeletal.png in wikipedia.
See also Encyclopaedia Britannica.
Attention ! Link "Save" does not work ! Why?
orange and purple will make red that can replace the congo red dye..
congo red
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Nigrosin
Congo Red is a sodium salt that has the chemical formula C32H22N6Na2O6S2. At one time, Congo Red was used as a dye for clothing but has since been abandoned due to its toxicity.
the red dye is red
mix red and blue dye Red dye- redberries blue dye- woad leaves
bleach the red dye out.
Red wine is red because of the grapes it is made from. Not dye.
You get red dye by smelting red mushrooms.
an orane red dye in a normal form of dye but just different names
use a red dye on a yellow dye to get orange dye
Metachromasy is the attribute of certain dyes changing in biological tissues changing color based on the tissues involved. Congo Red is a particular dye, in a category separate from Metachromasia dyes, though it does act as a PH indicator between pH 3.0 and 5.2.
The red dye in jello is made from petroleum.
when congo red was mixed with milk it produced pink color solution.
Right now it is red, yes she did need to dye it to get it red. (:
Orange dye is made by combining a yellow dye and a red dye.
To get orange dye, use red dye with yellow dye.
I would use red dye, such as Rit-Dye.
can you have anything with red dye while pregnant?
does regular Pepsi have red dye in it
Add white to the red.
They did not dye their armour red. They wore a red tunic underneath.
Red and Yellow dye.
It depends on which red dye you want to know about. Food dye is often cochineal. Derived from an animal source.