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2,2,3,3,4,4,5,5-Octafluoro-1-pentanol is a halogenated derivative of an acyclic monohydric alcohol.

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2,2-Bis(hydroxymethyl)butyric Acid

2,2-Bis(hydroxymethyl)butyric Acid has a tertiary carboxylic acid group and two reactive hydroxyl groups.It is used for waterborne polyurethanes,polyesters,epoxy resins and coatings,adhesives.

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2,2-Dihydroxy-1,3-dioxohydrindene is a chemical used to detect ammonia or primary and secondary amines. When reacting with these free amines, a deep blue or purple color known as Ruhemann's purple is produced. It is most commonly used to detect fingerprints, as the terminal amines of lysine residues in peptides and proteins sloughed off in fingerprints react with ninhydrin. It can also be used to monitor deprotection in solid phase peptide synthesis (Kaiser Test). The chain is linked via its C-terminus to the solid support, with the N-terminus extending off it. When that nitrogen is deprotected, a ninhydrin test yields blue. Amino-acid residues are attached with their N-terminus protected, so if the next residue has been successfully coupled onto the chain, the test gives a colorless or yellow result.

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