Description

2,3,3-Trimethyl-1-(3-Sulfonatopropyl)-Indolinium-5-Sulfonic Acid, Potassium Salt is a high-purity, water-soluble indolinium dye intermediate. This compound is valued for its dual sulfonate functionality, which provides excellent solubility and stability in aqueous systems, making it a critical precursor for advanced functional dyes. It is primarily sought after by manufacturers in the specialty chemicals, photographic, and high-performance ink industries for synthesizing cyanine and other polymethine dyes.

Application

• Key Intermediate for Cyanine Dyes: Essential for the synthesis of near-infrared (NIR) fluorescent cyanine dyes used in bioimaging and medical diagnostics.
• Photographic Sensitizers: Used in the production of spectral sensitizers for silver halide photographic films and papers.
• Optical Recording Media: A crucial component in the manufacture of dyes for CD-R, DVD-R, and other optical data storage layers.
• Laser and Nonlinear Optical Materials: Serves as a building block for dyes with applications in laser technology and nonlinear optics.
• Inkjet Printing Inks: Used in the formulation of high-quality, light-fast specialty inks for industrial and graphic arts printing.
• Research & Development: A valuable reagent for academic and industrial R&D in organic synthesis and material science.

Basic Information

Product Name	2,3,3-Trimethyl-1-(3-Sulfonatopropyl)-Indolinium-5-Sulfonic Acid, Potassium Salt
CAS No.	427882-78-8
Molecular Formula	C15H20KNO6S2
Molecular Weight	413.55 g/mol
Synonyms	Potassium 2,3,3-Trimethyl-1-(3-sulfonatopropyl)-3H-indolium-5-sulfonate; 1-(3-Sulfopropyl)-2,3,3-trimethyl-5-sulfo-3H-indolium, inner salt, potassium salt; 3H-Indolium, 1-(3-sulfopropyl)-2,3,3-trimethyl-5-sulfo-, inner salt, potassium salt; Cy3 phosphoramidite precursor salt; Trimethylindolinium sulfonate potassium salt; K-3-Sulfopropyl-2,3,3-trimethylindolenine-5-sulfonate; Inner salt of 1-(3-Sulfopropyl)-2,3,3-trimethyl-5-sulfoindolenine, potassium salt
EINECS	Contact for details

Quality Control

Our production of 2,3,3-Trimethyl-1-(3-Sulfonatopropyl)-Indolinium-5-Sulfonic Acid, Potassium Salt adheres to stringent quality protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent high-grade material suitable for sensitive synthetic applications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Solubility (in Water)	Clear, complete solution

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.