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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.
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What do you do with eosin?
Perhaps the most common use of eosin dye is in blood testing. Technicians mix the dye with a small amount of blood, then count how many cells absorb the fluorescent red dye. Several serious diseases cause a count of more than 500 eosinophils/microlitre of blood.
Nation west of Congo?
Angola and Zambia are both South of Congo
How can you use indigo in a sentence?
The rocks in the canyon have varying hues of red, and tan, and indigo. The indigo plant was widely use to make a blue clothing dye.
What happens when you put dye in water?
If you boil it, the water will boil and the dye will not, leaving you with dye.
Why is a red shirt red?
Red paint is red because it contains red dyes. Dyes are pigments that absorb all the colors in white like except the color they reflect. Thus a red dye absorbs all colours in white light except red. Light coming off it therefore looks red.
What can be used in place of Congo red dye?
orange and purple will make red that can replace the congo red dye..
What is lambda max for Congo red dye adsorption?
495
What is another example of a acidic dye besides Congo red?
Nigrosin
What ingredients are Congo Red made up of?
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.
What is the difference between Metachromasia and the stain Congo red?
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.
How do you make purple dye?
mix red and blue dye Red dye- redberries blue dye- woad leaves
How do you get orange dye in RuneScape?
use a red dye on a yellow dye to get orange dye
What is an orange-red dye?
an orane red dye in a normal form of dye but just different names
How do you get pink dye in minecraft?
rose red dye and bonemeal
How do you remove red dye from white jeans?
bleach the red dye out.
What is the reaction of milk with Congo red?
when congo red was mixed with milk it produced pink color solution.
How do you get red dye on mine craft pocket edition?
You get red dye by smelting red mushrooms.
