Description
NIR-781 Heptamethine cyanine PF6- is a polymethine dye with empirical formula C₃₈H₄₈ClF₆N₂P and CAS number 885691-97-4. This near-infrared cyanine displays an absorption maximum of 781 nm in methanol and a molar mass of 713,23 g/mol. The heptamethine structure with hexafluorophosphate counterion provides a defined molecular basis for investigating optical response in the near-infrared window. From manufacturer Carl ROTH and carrying EG number 812-347-2, the dye serves laboratories that need strong absorption near 781 nm for method development, comparative dye studies, or formulation trials. The compact glass presentation supports controlled dispensing in analytical and synthetic settings where accurately managed amounts of specialised polymethine dye are required for optical and imaging-related work.
This article is part of Photometers & spectrophotometers, in Spectroscopy & photometry.
Key features
- CAS number: 885691-97-4
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 812-347-2
- Empirical formula: C₃₈H₄₈ClF₆N₂P
- Molar mass: 713,23 g/mol
- Safety Data Sheet:
Compliance & Safety Information
Warning
Hazard Statements (H-Phrases)
Recently viewed
You may also like
Questions about S 0749 - FEW Chemicals, 781 nm in MeOH, 1 g, glass
What is this article?
S 0749 - FEW Chemicals, 781 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 Lab instruments.
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 Lab instruments.
Shelves beside this one are Refractometers & polarimeters and Lamps, cuvette holders & accessories.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.