Description
VIS-NIR Heptamethine cyanine PF6- is a polymethine dye with CAS number 1472004-00-4 and empirical formula C₄₄H₅₃F₆N₂P. It shows an absorption maximum of 761 nm in methanol and has a molar mass of 754,88 g/mol, placing its optical response in the visible to near-infrared region. The material is As a heptamethine cyanine bearing a hexafluorophosphate counterion, it provides a defined conjugated structure for studies that require reproducible absorption behaviour around 761 nm. Categories of use include dyes and pigments research where VIS-NIR heptamethine systems are evaluated for optical or analytical purposes. This cyanine is available from manufacturer Carl ROTH for chemical and life-science laboratories that need gram-scale quantities of a characterised polymethine dye. The associated EG number is 812-714-7. Handling and documentation follow standard laboratory practice for organic dyes of this class, supporting method development, reference measurements, and comparative dye screening in methanol and related media.
This article belongs on Photometers & spectrophotometers, in Spectroscopy & photometry.
Key features
- CAS number: 1472004-00-4
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 812-714-7
- Empirical formula: C₄₄H₅₃F₆N₂P
- Molar mass: 754,88 g/mol
- Safety Data Sheet:
Compliance & Safety Information
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Hazard Statements (H-Phrases)
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Questions about S 2138 - FEW Chemicals, 761 nm in MeOH, 1 g, glass
What is this article?
S 2138 - FEW Chemicals, 761 nm in MeOH, 1 g, glass 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.
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