255 Results for: "pH Colored Solutions"

Supplier: MP Biomedicals

Phenol red is an acid-base indicator. It is made by condensing two moles of phenol with one mole of o-sulfobenzoic acid anhydride.
Phenol Red is used as a pH indicator in cell culture applications. A solution of phenol red will have a yellow color at a pH of 6.4 or below and a red color at a pH of 8.2 and above. Phenol red in tissue culture media can act as a weak estrogen, especially with human breast cancer cells. Phenol red can be used to measure hydrogen peroxide in cultured macrophages in multiwell plates.
Store at Room Temperature (15-30 °C)

Supplier: G-Biosciences

PBST is commonly used as a wash solution for Western blot membranes and microtiter plate wells in ELISA assays. The PBST is an optimal formulation of pH stabilizers, salts and detergents designed to effectively remove excess material from membranes and microtiter plate wells without disrupting the antigen/antibody binding reaction.

Supplier: MP Biomedicals

Cholic acid is a biochemical solubilizing agent (a non-ionic, non-denaturing detergent). Occurs inconjugation with glycine or taurine in bile of most vertebrates.

Supplier: Adipogen

Fluorescent probe and pH indicator. It fluoresces blue in acidic solutions and in acidic organelles but fluoresces green in more basic organelles. This compound is potentially useful as a coloring agent, biological stain or optical detecting reagent. It is used in water-in-oil-in-water emulsions and as a substrate for lipase activity. Spectral data: lambdaex 375nm, lambdaem 404nm in water.

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.

Supplier: G-Biosciences

Ellman's reagent is a versatile, water-soluble compound for quantifying free sulfhydryl groups in solution. It reacts with a free sulfhydryl group to yield a mixed disulfide and 2-nitro-5-thiobenzoic acid (NTB), a measurable yellow colored product at 412nm.
Ellman's reagent is very useful as a free sulfhydryl assay reagent due to its high specificity for -SH groups at neutral pH, high molar extinction coefficient and short reaction time.

Supplier: Adipogen

A sensitive reagent for measuring the free sulfhydryl content in proteins, peptides, and tissues. Used to characterize reactive thiol groups and photometric determination of thiols and for measuring low-molecular mass thiols such as glutathione in both pure solutions and biological samples, such as blood. It can also measure the number of thiol groups on proteins. Through reaction with aliphatic thiol groups a mixed disulfide of protein thiol and one mole of 2-nitro-5-thiobenzoate per mole of protein sulfhydryl group is being formed. DTNB has little absorbance. Reaction with -SH groups on proteins (from any solvent accessible Cys) under mild alkaline conditions (pH 7-8) produces the 2-nitro-5-thiobenzoate anion, which gives an intense yellow color with an absorption maximum at 409.5nm (Extinction coefficient: 14150 M-1*cm-1). Sensitive to various buffer ions, therefore, the extinction coefficient used to calculate the number of sulfhydryl groups must be matched to the reaction conditions. In case the thiol groups are in disulfide bonds, they must be reduced under anaerobic conditions prior to reaction with DTNB.

Supplier: TCI America

pH 4.8 (Purple) - pH 5.4 ( Gray) - pH 5.8 (Green)
MDL Number: MFCD00070843
Form: Liquid
Color: Deep Green
Storage Temperature: 0-10°C

Supplier: BDH

Used for rapid pH testing directly at the point of interest, strips are always ready for immediate use.

Supplier: Ward's Science

Buffer solution has a shelf life of 24 months

Supplier: Micro Essential

Chemvelopes are made of a triple protective foil consisting of aluminum, polyethylene and paper which keeps the Hydrion Buffers dry and free-flowing.

Supplier: Micro Essential

This short-range Hydrion pH paper is excellent for measuring pH solutions.

Supplier: MILWAUKEE INSTRUMENTS, INC.

Premium quality, high accuracy pH buffer for calibrating pH meters.

Supplier: Micro Essential

This short-range Hydrion pH paper is excellent for measuring pH solutions around neutral pH 7.00.

Supplier: Advantec MFS

pH Test Papers–Various types of indicator papers cover a wide pH range to allow for good accuracy of determining pH value of a solution

Supplier: G-Biosciences

Ready-to-Use: Convenient, time-saving formulation ideal for consistent experimental reproducibility.

Supplier: QUALITY BIOLOGICAL, INC.

PBS (1X), USP Grade is a ready-to-use phosphate-buffered saline solution. This PBS formulation is manufactured with USP-grade ingredients. It is not a USP reference standard solution.

Supplier: MilliporeSigma

Supplier: Ward's Science

Use Color Transition of Titration to Determine Water Hardness.

Supplier: G-Biosciences

TBS solution is primarily used as a wash and blocking buffer diluent for Western blot, ELISA and immunoassays.

Supplier: Hach

Phenol Red Indicator Solution

Supplier: Avantik

Optik Type 1 Bluing Reagent is bluing reagent with a pH of 8.0 to assure proper bluing of hematoxylin stained tissue sections. It is also more resistant to the effects of carry-over and remains in the proper pH range for a longer period of time.

Supplier: Cytiva

Universal indicator papers which have been impregnated with a mixture of several indicators.

Supplier: Cambridge Diagnostic Products

Each vial contains enough buffer to prepare one gallon of pH 7.15 buffer solution for use in the five-step staining process

Supplier: SPEX CERTIPREP LLC

Certified pH buffers are made using high purity starting materials and ASTM Type I Water, and are thoroughly analyzed for certified value and homogeneity. Buffers are accurate, premium grade for calibration and quality control checks.

Supplier: Epredia

Employ a gentle, pH-controlled solution for bluing hematoxylin with the Epredia™ Shandon™ Bluing Reagent.

Supplier: CANCER DIAGNOSTICS, INC.

The Endure Staining System is designed to produce precise, consistent H&E staining.

Supplier: Cytiva

Blue litmus and red litmus papers facilitate a general test for acid or alkaline reaction. The change occurs around pH 5 to 8. They are particularly recommended for educational use.

Supplier: Electron Microscopy Sciences

Fixative Reagent Grade (Karnovsky’s). This fixative contains 3% glutaraldehyde and 2% formaldehyde in 0.1M phosphate buffer, pH 7.4. Karnovsky’s with formalin 2% and Biological glutaraldehyde 3% in 0.1m Phosphate Buffer. Karnovsky’s with paraformaldehyde solution and EM grade glutaraldehyde.

Supplier: SPEX CERTIPREP LLC

QC sample directly traceable to NIST SRMs, mercury free, guaranteed stable for at least one year after your receipt, and supplied with a full certificate of analysis