Description
Le NIR-781 cyanine heptaméthine PF6- est un colorant polyméthine de formule brute C₃₈H₄₈ClF₆N₂P et de numéro CAS 885691-97-4. Cette cyanine proche infrarouge présente un maximum d'absorption de 781 nm dans le méthanol et une masse molaire de 713,23 g/mol. La structure heptaméthine avec son contre-ion hexafluorophosphate fournit une base moléculaire définie pour étudier la réponse optique dans la fenêtre du proche infrarouge. Issu du fabricant Carl ROTH et portant le numéro CE 812-347-2, ce colorant est destiné aux laboratoires nécessitant une forte absorption proche de 781 nm pour le développement de méthodes, des études comparatives de colorants ou des essais de formulation. Le conditionnement en flacon en verre compact facilite un dosage contrôlé dans les environnements analytiques et synthétiques où des quantités précisément gérées de ce colorant polyméthine spécialisé sont requises pour des travaux d'optique et d'imagerie.
Cet article appartient à la catégorie Photomètres & spectrophotomètres, dans Spectroscopie & photométrie.
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Questions about S 0749 - FEW Chemicals, 781 nm dans du MeOH, 1 g, verre
What is this article?
S 0749 - FEW Chemicals, 781 nm dans du MeOH, 1 g, verre is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Photometers & spectrophotometers, inside Spectroscopy & photometry, in Instruments de précision.
A photometer reads absorbance at one or a few wavelengths. A spectrophotometer scans or selects many. Both send light through a cuvette or a well. The wavelength range, UV or visible, and the bandwidth decide what can be measured. A visible-only instrument cannot read a nucleic acid at 260 nm.
A photometer or spectrophotometer sends light through a sample and reads how much was absorbed. In the range where the Beer–Lambert relation holds, absorbance tracks concentration. A refractometer reads how a liquid bends light, which tracks dissolved solids. A polarimeter reads the rotation of polarised light, the classical measurement for sugars. The lamp, the wavelength and the cuvette path length are the three things that have to be right before the number means anything. The optical quantities trace to NIST and the BIPM.
Which category should I open next?
The category is Spectroscopy & photometry. The sub-category is Photometers & spectrophotometers. The catalogue is Instruments de précision.
Shelves beside this one are Refractometers & polarimeters and Lamps, cuvette holders & accessories.
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