Description

Fast Red Kl Salt, 90% CAS NO 677706-33-1 is a high-purity diazonium salt primarily used as a coupling agent in the synthesis of azo dyes and pigments. This compound is valued for its ability to produce vibrant, lightfast red and orange hues in various industrial applications. It is an essential intermediate for manufacturers in the textile, ink, and specialty chemical industries seeking consistent color development and batch-to-batch reliability.

Application

• Primary coupling component for the synthesis of azo dyes and pigments, particularly for red and orange shades.
• Key intermediate in the production of textile dyes for cotton, nylon, and other synthetic fibers.
• Used in manufacturing printing inks for packaging, publications, and security printing.
• Employed in the synthesis of colorants for plastics and polymers to achieve specific color standards.
• Acts as a reagent in histological staining for biological and medical research applications.
• Potential use in the development of functional dyes for non-textile applications such as imaging and sensors.

Basic Information

Product Name	Fast Red Kl Salt, 90%
CAS No.	677706-33-1
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Fast Red KL Salt; Fast Red K.L. Salt; 4-Chloro-2-nitrobenzenediazonium Salt; 4-Chloro-2-nitrobenzenediazonium Tetrafluoroborate; Diazonium Salt of 4-Chloro-2-nitroaniline; C.I. 37135; Fast Red KL Base; Fast Red K.L. Base
EINECS	Contact for details

Quality Control

Our Fast Red Kl Salt is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure it meets the declared 90% minimum purity and consistent performance characteristics. Certificates of Analysis (COA) detailing assay, identity, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

Storage

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

Specification

Item	Specification
Appearance	Yellow to light brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90.0%
Water Content (KF)	Contact for details
Solubility	Soluble in polar organic solvents

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