New Arrival pH Indicator Congo Red Red to Brown Powder Congo Red Indicator CAS 573-58-0
Product Details
Red to Brown Powder Congo Red
,pH Indicator Congo Red
,New Arrival Congo Red Indicator
Congo red is an aniline dye (also classified as a coal tar dye). It belongs to a broad family of dyes with a very wide range of applications. Its main drawback is that it fades easily under sunlight; related dyes such as aniline blue, bright green, and methyl green fade even more readily. Careful control of pH and avoidance of direct sunlight during flaking will help the product retain its color for several years without fading.
Congo red is an acid dye supplied as a purplish-red powder. It is soluble in water and alcohol and turns blue in acidic conditions. It serves both as a dye and as a pH indicator. In the preparation of plant slides, it is frequently used as a counterstain for hematoxylin or other cell dyes. When applied in cytoplasm staining, it dyes the cytosol or fibrin red. In tissue sectioning, it is used to stain nerve axons, elastic fibers, embryonic materials, and similar structures. Congo red can also be used for double staining with hematoxylin and for amyloid staining. Because it is soluble in water and alcohol, washing and dehydration steps should be performed quickly.
| Product Name | Congo Red |
|---|---|
| CAS Number | 573-58-0 |
| Molecular Formula | C32H22N6Na2O6S2 |
| Molecular Weight | 696.66 |
| EINECS Number | 209-358-4 |
| Appearance | Red to Brown Powder |
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