Description
Fluorescein isothiocyanate Isomer I is a fluorescent labelling reagent supplied at a minimum purity of 90 %, identified by CAS number 3326-32-7 and the empirical formula C₂₁H₁₁NO₅S. The compound has a molar mass of 389,39 g/mol. As a classic FITC isomer, it is applied in biological staining, protein and antibody labelling, and fluorescence-based detection methods across cell biology and biochemistry. This grade comes from manufacturer Carl ROTH within the dyes for biological applications range. The isothiocyanate group enables covalent attachment to primary amines on biomolecules, supporting workflows such as immunofluorescence, flow cytometry preparation and fluorescence microscopy. Clear identity data including EG number 222-042-0 help laboratories document reagents for validated protocols. The compact pack size is practical for method optimisation, pilot labelling runs and laboratories that require controlled inventory of reactive fluorescent dyes without holding excess material on the bench.
This article belongs on Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- Appearance: orange-yellow, fine powder
- Assay (HPLC): ≥90.0 %
- CAS number: 3326-32-7
- Pack sizes: 250 mg, 100 mg
- EG nr.: 222-042-0
- Purity: min. 90 %
- Empirical formula: C₂₁H₁₁NO₅S
- Molar mass: 389,39 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
Danger
Hazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about Fluorescein isothiocyanate Isomer I, min. 90 %, 100 mg, glass
What is this article?
Fluorescein isothiocyanate Isomer I, min. 90 %, 100 mg, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Fluorescent dyes & labels, inside Dyes, stains & indicators, in Lab chemicals.
A fluorescent dye absorbs at one wavelength and emits at a longer one. As a label it is attached to a protein, a nucleic acid or a cell. Excitation and emission maxima, and the reactive group if it must conjugate, are the specification. The colour name does not tell you the wavelengths.
A dye or a stain binds, or changes colour, so that something invisible becomes visible. An indicator changes at a pH or a redox point. A fluorescent dye absorbs one wavelength and emits another, which is how a microscope or a plate reader picks it out. The excitation and emission, or the transition interval, are the specification. The colour name on the label is not. Structures are on PubChem under IUPAC names. Methods are in the PubMed literature.
Which category should I open next?
The category is Dyes, stains & indicators. The sub-category is Fluorescent dyes & labels. The catalogue is Lab chemicals.
Shelves beside this one are Microscopy stains & staining solutions and Dyes & pigments.
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.