Description

Oxonol Yellow K is a specialized organic dye belonging to the oxonol class, known for its distinct yellow color and specific spectral properties. This compound is valued for its utility as a functional colorant and indicator in advanced material science and analytical applications. It is primarily sought by manufacturers and researchers in the photographic, optical filter, and specialty chemical synthesis industries.

Application

• Photographic Sensitizer: Used in the formulation of color photographic films and papers.
• Optical Filter Agent: Incorporated into dyes for optical filters and light-absorbing materials.
• Laser Dye Intermediate: Serves as a precursor or active component in the synthesis of laser dyes.
• Analytical Chemistry Reagent: Functions as a colorimetric indicator or probe in specific chemical assays.
• Non-linear Optical Material: Potential use in the research and development of materials for photonics.
• Specialty Ink Formulation: Employed in high-performance inks for security or technical printing.

Basic Information

Item	Detail
Product Name	Oxonol Yellow K
CAS No.	82407-55-4
Molecular Formula	C25H19N2NaO4S
Molecular Weight	466.48 g/mol
Synonyms	Oxonol Yellow; Oxonol Yellow K Dye; 5-[(1,3-Dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene]-3-(4-sulfobutyl)-2-thioxo-4-thiazolidinone, inner salt, sodium salt; 5-[(1,3-Dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene]-3-(4-sulfobutyl)-2-thioxo-4-thiazolidinone sodium salt; C.I. 56061; K Yellow Oxonol; NK 2012
EINECS	Contact for details

Quality Control

Our Oxonol Yellow K is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color value, and identity confirmation via IR and NMR. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment to ensure traceability and batch-to-batch consistency for our global B2B clients.

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). Keep away from incompatible materials and sources of ignition.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Specific Absorbance	Contact for details

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