75 Results for: "merck indicators"

Supplier: Merck

Starch, soluble, Sigma-Aldrich®

Supplier: Merck

CASO broth is a universal culture medium, a selective and differential medium for the primary isolation of members of the protease without indicator or inhibitor. Intended for a broad range of applications.

Supplier: SIGMA ALDRICH MICROSCOPY

Indicator for organolithium assay.

Supplier: Merck

Starch, soluble, Sigma-Aldrich®

Supplier: Merck

o-Cresolphthalein complexone, Sigma-Aldrich®

Supplier: Merck

Starch, soluble (from potato), Sigma-Aldrich®

Supplier: Merck

Fuels Testing Certified Reference Material for the calibration and verification of laboratory instruments used in testing petroleum and derivative products for hydrocarbon types in liquid petroleum products by fluorescent indicator adsorption ASTM D1319.

Supplier: SIGMA ALDRICH MICROSCOPY

Methyl Purple,in H2O (Methyl Purple indicator solution)

Supplier: SIGMA ALDRICH MICROSCOPY

Suitable for titration of morpholine

Supplier: SIGMA ALDRICH MICROSCOPY

Pyrocatechol Violet (PV) is a sulfone phthalein dye. It chelates metal ions. The metal-PV complex is bluish-violet in colour.

Supplier: Merck

Benzyl viologen dichloride (BVD) is an electrochromic indicator, which contains two chlorine atoms and an organic constituent attached with two nitrogen cations. In a redox reaction, BVD can be reduced in three states with different colors.

Supplier: SIGMA ALDRICH MICROSCOPY

It contains p-Phenylenediamine diHCL (1 part) and catechol (2 parts). Commonly referred to as Hanker Yates reagent. Kit component in the Sigma Leukocyte peroxidase (myeloperoxidase) Procedure, 390A.

Supplier: Merck

Iron level in blood is a reliable diagnostic indicator of various disease states. Increased levels of iron concentration in blood are associated with red blood cell destruction, decreased blood cell survival, acute hepatitis, certain sideroblastic anemias, ingestion of iron-rich diets, defects in iron storage (e.g., pernicious anemia). Decreased levels of blood iron may result from insufficient iron ingestion from diets, chronic blood loss pathologies, or increased demand on iron storage as during normal pregnancy.

Supplier: SIGMA ALDRICH MICROSCOPY

3-Methoxydiphenylamine can be used in the preparation of 3- methoxydiphenylamine-4-diazonium salts (MDP-4-DS) and the corresponding diazoresins.[1] Diazonium salts and diazoresins find applications in dyes, stains, indicators, general laboratory use, and industrial applications.

Supplier: SIGMA ALDRICH MICROSCOPY

An intracellular fluorescent pH indicator.

Supplier: SIGMA ALDRICH MICROSCOPY

Calcium-specific chelator and indicator. Upon binding calcium there is a shift in the UV spectrum and an enhancement of fluorescence.

Supplier: SIGMA ALDRICH MICROSCOPY

Murexide is the ammonium salt of purpuric acid that appears as a slightly reddish-purple powder and is soluble in water. It is mainly used as an indicator for complexometric titrations to measure water hardness and as a colorant/pigment in the dye industry.

Supplier: Merck

Acid Fuchsin is mainly used as a diachrome and is part of the connective tissue stains. It also works as a pH indicator.

Supplier: SIGMA ALDRICH MICROSCOPY

Methyl violet for microscopy (Bact., Bot., Hist.), indicator (pH 0.1 - 2.0), mixture of polymethylated pararosaniline hydrochlorides.

Supplier: SIGMA ALDRICH MICROSCOPY

4-(2-Pyridylazo)resorcinol monosodium salt is a chromophoric indicator and chromogenic chelator employed for the spectrophotometric determination of several metal ions.

Supplier: SIGMA ALDRICH MICROSCOPY

Bromocresol purple (BCP) is an organic dye and a pH indicator. It changes from yellow (pH 5.2) to purple (6.8). BCP reacts with ammonia to yield ammonium salt. Hence, it can be used as an ammonia sensing probe.

Supplier: SIGMA ALDRICH MICROSCOPY

2′,7′-Dichlorofluorescein is an oxidation-sensitive fluorescent probe. 2′7′-dichlorofluorescein diacetate is oxidized to 2′7′-dichlorofluorescein in the presence of ROS (reactive oxygen species). 2′,7′-Dichlorofluorescein has been used as an oxidation-sensitive fluorescent probe to measure ROS (reactive oxygen species) formation in cells.

Supplier: SIGMA ALDRICH MICROSCOPY

Redox indicator. Blue fluorescence until oxidized to ethidium. Dihydroethidium has been used as a superoxide probe in bovine pulmonary artery endothelial cell (BPAEC).

Supplier: SIGMA ALDRICH MICROSCOPY

Morin hydrate is a yellowish pigment and a fluorescent indicator. It is used for the fluorimetric determination of several metals, mostly aluminum. Morin has been utilised in fluorescent microscopy as a fluorescent nuclear stain and as an application to detect aluminium in the brain by demonstrating metal salts.

Supplier: SIGMA ALDRICH MICROSCOPY

Tetrabromophenol Blue (TBPB) belongs to the group of sulfonephthalein acid-base indicators. It is employed in the potentiometric titration of the halogens with Hg₂(NO₃)₂. In addition, it has been used as a dye indicator in urine dipstick test to detect proteinuria. In this assay, with increasing concentration of urinary protein, TBPB sequentially changes colour from pale green to blue. Binding of TBPB to proteins is dependent on pH.

Supplier: SIGMA ALDRICH MICROSCOPY

m-cresol purple sodium salt (MCP) is a colorimetric pH indicator dye. The dye is blue in anionic form and yellow in protonated form. It has been used to measure pH of seawater using a spectrophotometer.

Supplier: SIGMA ALDRICH MICROSCOPY

Eriochrome Black T, Sigma-Aldrich®

Supplier: SIGMA ALDRICH MICROSCOPY

4-(4-Nitrophenylazo) resorcinol, also known as azo violet or magneson I, is a red colored powder. It functions as a spot test reagent and forms blue lake on reaction with Mg(OH)₂ in alkaline solution. It is mainly used for determining the presence of magnesium in the solution. 4-(4-Nitrophenylazo)resorcinol is a pH indicator.

Supplier: SIGMA ALDRICH MICROSCOPY

Phenol Red sodium salt is widely used as a pH indicator. At a pH of 6,4 and below, phenol red solution will have a yellow colour. At a pH of 8,2 and above, it will have a red colour. It is commonly used in culture media to detect neutral to acidic pH changes.

Supplier: SIGMA ALDRICH MICROSCOPY

Fura 2-AM (Fura 2) is a calcium-specific ratio-metric fluorescent dye. It is also known as acetoxy-methyl-ester. In response to calcium ions, ratio metric dyes like Fura 2 changes their respective excitation or emission spectra. The intracellular calcium concentration is determined by the fluorescence emission ratio or excitation at distinct wavelengths. Fura 2 has an emission peak at 505 nm, and the excitation peak ranges between 340 to 380 nm and is the preferred calcium indicator.