Description

Fast Red Rc Salt is a high-purity diazonium salt primarily used as a coupling component in the synthesis of azo dyes and pigments. This compound is valued for its ability to produce vivid, lightfast red and scarlet shades with excellent application properties. It is an essential intermediate for manufacturers in the textile, ink, and specialty coatings industries seeking consistent color performance and batch-to-batch reliability.

Application

• Textile Dyeing and Printing: A key coupling agent for producing bright red azo dyes on cotton, nylon, and other synthetic fibers.
• Pigment Manufacturing: Used in the synthesis of organic pigments for inks, plastics, and paints, offering good tinting strength and stability.
• Biological Staining: Employed in histology and cytology as a diazonium salt for enzyme localization and tissue staining applications.
• Specialty Inks: A component in the formulation of high-performance inks for packaging and security printing.
• Research & Development: Serves as a versatile chemical intermediate in organic synthesis and material science research.

Basic Information

Product Name	Fast Red Rc Salt
CAS No.	93-34-5
Molecular Formula	C14H14ClN3O3S
Molecular Weight	339.80 g/mol
Synonyms	Fast Red RC Salt; Fast Red RC Base; 5-Chloro-2-methoxy-4-nitrobenzenediazonium 4-methylbenzenesulfonate; 5-Chloro-2-methoxy-4-nitrobenzenediazonium p-toluenesulfonate; 4-Nitro-5-chloro-2-methoxybenzenediazonium p-toluenesulfonate; Fast Red RC; C.I. 37120; Diazo Fast Red RC; Red RC Salt
EINECS	202-242-9

Quality Control

Our Fast Red Rc Salt is manufactured under strict quality management systems to ensure high purity and consistent performance. Each batch is tested against rigorous in-house specifications, which typically include assay (HPLC), identification (IR), and control of key impurities. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed to prevent degradation from moisture and exposure.

Specification

Item	Specification
Appearance	Light yellow to beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Solubility	Soluble in water, acetone

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