241 Results for: "Dioxide Powder"

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Thymol blue sodium salt (red) 1.2 to 2.8 (yellow), (yellow) 8.0 to 9.6 (blue)

Supplier: Ambeed

Sodium 4-(3-(4-hydroxy-5-isopropyl-2-methylphenyl)-1,1-dioxido-3H-benzo[c][1,2]oxathiol-3-yl)-2-isopropyl-5-methylphenolate, Purity: (red)1.2 to 2.8(yellow), (yellow)8.0 to 9.6(blue), CAS: 62625-21-2, Appearance: Orange to Brown powder/crystal, Storage: Inert atmosphere, Room Temperature, Size: 25g

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Phenol red, powder ACS

Supplier: MP Biomedicals

Phenol Red Sodium Salt is used as a pH indicator, it is used widely in culture media to identify changes from neutral to acidic pH values.

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Bromocresol purple, Powder

Supplier: MP Biomedicals

Bromocresol Purple is used as a pH indicator (5.2-6.8 : yellow to blue-purple). Used in spectrophotometric determination of serum-albumin.

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m-Cresol purple

Supplier: Spectrum Chemical Mfg. Corp.

m-Cresol Purple, also known as m-Cresolsulfonphthalein, is a pH indicator dye used primarily in spectrophotometric pH measurements. m-Cresol purple is acidic and hydrophobic. The useful pH ranges are 1.2 - 2.8 (red to yellow) and 7.4 - 9.0 (yellow to violet).

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Trichloroacetic acid (TCA) ≥99.0%, powder ACS

Supplier: MP Biomedicals

Trichloroacetic acid is used in protein precipitation; has been used to determine protein concentration by quantitative precipitation. Used as a decalcifier and fixative in microscopy. A protocol for the precipitation of nucleic acids can be found in Molecular Cloning.
Stability: Long term storage of aqueous solutions of less than 30% strength is not recommended. Decomposition products are chloroform, hydrochloric acid, carbon dioxide and carbon monoxide. Chloride ≤0.001% ; Nitrate ≤0.002%; Phosphate ≤5 ppm; Sulfate ≤0.02%

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D-(+)-Biotin ≥97.5%, white crystalline powder

Supplier: MP Biomedicals

Essential vitamin that is important for amino acid and energy metabolism, and fatty acid synthesis. It is a prosthetic group in four mammalian carboxylase families and facilitates the binding and transfer of carbon dioxide.

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Bromothymol blue, powder ACS

Supplier: MP Biomedicals

Bromothymol Blue (BTB) is a pH indicator (pKa approx. 7.1) that is used as a biological slide vital stain to define cell walls or nuclei under the microscope. BTB is also a component of several bacterial growth and detection substrates such as cystine lactose electrolyte deficient (CLED/BROLACIN); polymyxin pyruvate egg yolk mannitol bromothymol blue (PEMBA) and MacConkey agar.

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Sodium peroxide ≥93.0% ACS

Supplier: BeanTown Chemical

CAS: 1313-60-6; EC No: 215-209-4; MDL No: MFCD00003497; RTECS: WD3450000 UN No: UN1504; Haz Class: 5.1; Packing Group: I Powder; Molecular Formula: Na2O2 ; MW: 77.98 Melting Point: 460° (decomposes); Boiling Point: 657° Density (g/mL): 2.805 Air Sensitive , Hygroscopic

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EPPS (HEPPS, 4-(2-Hydroxyethyl)-1-piperazinepropanesulfonic acid), white powder

Supplier: MP Biomedicals

HEPPS is the propane analog of HEPES. HEPPS is used as a separator in ultrathin isoelectric focusing gels; enhances the resolution of phosphoglucomutase. HEPES is widely used in cell culture, largely because it is better at maintaining physiological pH despite changes in carbon dioxide concentration (produced by cellular respiration).

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Bromophenol blue, Powder

Supplier: MP Biomedicals

Bromophenol blue migrates at approximately the same rate as 300-500bp DNA in agarose gel and at the buffer front in protein polyacrylamide gels.

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Silicon dioxide ≥94.0% FCC 325 Mesh

Supplier: Spectrum Chemical Mfg. Corp.

Silicon Dioxide, 325 Mesh, FCC.

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Bromophenol blue, powder

Supplier: MP Biomedicals

Soluble in ethanol (0.1% w/v-clear yellow solution), methanol (40mg/4mL), EGME, water, benzene.

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Cerium(IV) oxide, nanopowder

Supplier: Strem Chemicals Inc

Nanomaterials

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Phenol red sodium salt

Supplier: Adipogen

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. This color change is an indication that even in the absence of contamination, the medium needs to be replaced. Shown to be a weak estrogen mimic (possible through inpurities), which can enhance the growth of cells that express the estrogen receptor in cell cultures. Might be useful as a differentiation factor.

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Trichloroacetic acid (TCA) ≥99%, powder

Supplier: MP Biomedicals

Trichloroacetic acid is used in protein precipitation; has been used to determine protein concentration by quantitative precipitation.

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Bromophenol blue sodium salt, dark green powder ACS

Supplier: MP Biomedicals

Bromophenol blue is a tracking dye for alkaline and neutral buffer systems. It is used as a tracking dye in DNA, RNA (agarose) and protein (polyacrylamide) gel electrophoresis.

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D-(+)-Biotin ≥97.5%, white crystalline powder cell culture reagent

Supplier: MP Biomedicals

Storage: +4 °C
D-Biotin is a growth factor present in small amounts in every living cell. It is involved in naturally occurring carboxylation reactions. It occurs mainly bound to proteins or polypeptides. It is more abundant in the liver, kidney, pancreas, yeast and milk. Biotin levels are higher in cancerous tumors than in normal tissues. It is inactivated by binding to avidin.
D-Biotin may be used to elute proteins from avidin/streptavidin resins. It is widely used for dietary supplements and fortified foods. It is also used for tablets and hard-shell capsule preparation due to its pharmaceutical properties.
Essential vitamin that is important for amino acid and energy metabolism, and fatty acid synthesis. It is a prosthetic group in four mammalian carboxylase families and facilitates the binding and transfer of carbon dioxide.
Soluble in water (22 mg/100 mL), ethanol (80 mg/100 mL), more soluble in hot water and in dilute alkalies; insoluble in other common organic solvents. Soluble in 2 M Ammonium hydroxide (50 mg/mL - clear, colorless solution), dimethylformamide (1.7 mg/mL).