51 Results for: "Ammonium carbonate&amp"

Indicator tablets for determination of water hardness by titration with EDTA.

Specifications
Minimum weight: ≥ 0.20 g
Maximum weight: ≤ 0.23 g
Disintegration time (at 25°C): ≤ 150 s
Application test: conforms

The tablets are dissolved in 100 ml of the water sample to be tested, which has been buffered at pH 10 with 1 ml of Ammonia/ Ammonium chloride buffer solution, and then titrated with EDTA solution (0,01 M) till the sample turns from red to blue.
Total hardness in mg/l = 10×ml of titrant used.

Control samples of calcium carbonate should be used to calibrate the method.

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Ammonium hydrogen carbonate, white powder

Supplier: MP Biomedicals

Ammonium bicarbonate is used in the manufacture of porous plastics, ceramics, dyes, and pigments, fire extinguishers. It has been used in the preparation and isolation of neoglycoprotein conjugates.

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Ammonium hydrogen carbonate 99.0-101.0% (by acidimetry), EMPROVE® ESSENTIAL Ph. Eur., BP, E503, extra pure suitable for use as excipient, SAFC®

Supplier: MERCK PRODUCTION CHEMICALS

Ammonium hydrogen carbonate 99.0-101.0% (by acidimetry), EMPROVE® ESSENTIAL Ph. Eur., BP, E503, extra pure suitable for use as excipient, SAFC®

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ML RR-S2 CDA (ammonium salt) ≥98%

Supplier: Cayman Chemical

ML RR-S2 CDA is a synthetic cyclic dinucleotide (CDN) that contains non-canonical 2'5'-phosphodiester bonds and is an activator of stimulator of interferon genes (STING).1 It contains mixed linkages (ML) with both 2'5' and 3'5' linkages, which leads to increased thermal stability of human STING in a differential scanning fluorimetry (DSF) assay. ML RR-S2 CDA increases type I interferon production by THP-1 human monocytes relative to unmodified cyclic di-AMP (CDA; Item No. 17753), indicating the ML enhances its action at human STING. It induces expression of IFN-β and the pro-inflammatory cytokines TNF-α, IL-6, and Mcp-1 in murine bone marrow macrophages (BMM) isolated from wild-type, but not STING-/-, mice. ML RR-S2 CDA also induces IFN-β expression in peripheral blood mononuclear cells (PBMCs) isolated from donors carrying STINGWT/WT, STINGWT/REF, and STINGWT/HAQ alleles. In vivo, ML RR-S2 CDA initiates tumor regression and prevents tumor growth upon tumor cell reimplantation in 4T1 breast and CT26 colon cancer mouse xenograft models.

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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).

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Avantor® Allsep Anion, Anion Exchange HPLC Columns

Supplier: Avantor

Allsep anion is a methacrylate based phase with quaternary ammonium functional groups, optimised for use with both suppressed and non-suppressed conductivity detection. They are recommended for applications involving inorganic anions, weak and strong acid ions, metal complexes and organic acids.