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Stains, staining systems, and blocking agents in a variety of types, grades, molecular weights, purities, and pH ranges; used to elucidate important structures of microorganisms including bacteria, viruses, protozoa, etc.
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Indigo carmine (indigotindisulfonate sodium) is a research-grade dye and analytical reagent used for the determination of ozone by chemiluminescence and as a redox indicator. In 0.2% aqueous solution it is blue at pH 11.4 and yellow at pH 13.0.
Used for ozone determination by chemiluminescence (CL).
Functions as a redox indicator; turns yellow upon reduction.
Purity 98.0%.
CAS number 860-22-0.
Molecular formula C16H8N2Na2O8S2; molecular weight 466.35 g/mol.
Available in pack sizes: 500 mg, 1 g, 5 g.
Appearance: solid, brown to black.
Storage: sealed, away from moisture and light; in solvent: -80°C for 6 months, -20°C for 1 month.
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Chemical. CAS 34487-61-1. Formula C19H13O5S . Na. MW 376.36. Synthetic Water soluble pH indicator used in the 6.8 yellow to 8.2 red range and frequently used in cell biology laboratories. Widely used as cell tissue culture pH marker. A small amount of phenol red added to the growth medium will have a pink-red color under normal conditions. Typically, 15 mg/l are used for cell culture. In the event of problems, waste products produced by dying cells or overgrowth of contaminants will cause a change in pH, leading to a change in indicator color. For example, a culture of relatively slowly dividing mammalian cells can be quickly overgrown by bacterial contamination. This usually results in an acidification of the medium, turning it yellow. The waste products produced by the mammalian cells themselves will slowly decrease the pH, gradually turning the solution orange and then yellow.
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Used in Masson's Trichrome for Connective Tissue for stain nuclei, agentaffen granules, collagen, cytoplasm, keratin, etc. References: Sheehan and Hrapchak: Theory and Practice of Histotechnology, St. Louis. The Moxby Company 1980, p. 190
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Vector Hematoxylin QS is a modification of Mayer's Hematoxylin and was developed especially for immunocytochemistry. It provides crisp blue nuclear staining. This formula is ready-to-use without filtration, requires no separate bluing step, and stains in less than 45 seconds. Vector Hematoxylin QS contains no mercury and provides excellent color contrast with most commonly used peroxidase and alkaline phosphatase substrates. This counterstain is suitable for use with non-aqueous and aqueous mountants.
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