CONGO RED
- Part number
- RXSOL-69-5735-800
- Category
- Stains Indicator Reagents
- Brand
- RXSOL
Overview
Congo red excellent quality manufacturer, exporter and supplier. Congo red is an organic compound, the sodium salt of 3,3′-([1,1′-biphenyl]-4,4′-diyl)bis(4-aminonaphthalene-1-sulfonic acid. It is an azo dye. Congo red is water-soluble, yielding a red colloidal solution; its solubility is greater in organic solvents. However, the use of Congo red has long been abandoned, primarily because of its carcinogenic properties.
Technical specifications
| C.A.S. No. | 573-58-0 |
| CI NO. | 22120 |
| M.F. | C32H22N6Na2O6S2 |
| M.W. | 696.66gm/mole |
Specifications:
|
Mol. weight: 696.665 g/mol
Odor: Odorless.
Color: Red. Brownish-red. (Dark.)
pH (1% soln/water): 8.5 - 9.0 [Basic.]
Melting Point: >360°C (680°F)
Solubility: Soluble in cold water. Very slightly soluble in acetone. Insoluble in diethyl ether. Soluble in Ethanol. Solubility in water: 1g/30 ml water
Applications
Congo red was formerly used to dye cotton but has been superseded by dyes more resistant to light and to washing. It is still used in histology to stain tissues for microscopic examination, and to serve as an acid-base indicator, since it turns red in the presence of alkalies and blue when exposed to acids.
Congo Red is an inverse ph indicator.
Dosage and directions
Congo Red is an acid-base indicator and it turns red when it comes in contact with bases or alkalies and turns blue in presence of acids.Congo red is water-soluble compound and its solubility is greater in organic solvents. Congo Red is a heterocyclic aromatic chemical compound with molecular formula, C32H22N6Na2O6S2
Availability
CONGO RED manufacturer supplier distributor in Mumbai, Kandla, Kolkata, Vizag, Chennai, India, Fujairah, Dubai, Sharjah, UAE, Gulf, Middle East, Muscat Oman, Kenya Africa. Get the best quality of CONGO RED at a competitive price from us. We have ready stock of CONGO RED in India, UAE Gulf, Oman, Kenya Africa. Contact us for bulk as well as small orders.
Frequently asked questions
Is Congo red acidic or basic?
The dye itself is the sodium salt of a sulphonic acid (an "acid dye"); its 1% solution is mildly basic (pH 8.5–9). As an indicator it turns blue in acid and red in alkali.
What is the molecular weight of Congo red?
696.66 g/mol.
Solubility?
About 1 g per 30 ml water (red colloidal solution); more soluble in ethanol; very slightly in acetone.
