Description

Nuclear Fast Red CAS NO 6409-77-4 is a synthetic azo dye widely recognized as a versatile biological stain and histochemical reagent. Its primary value lies in its ability to form stable, colored complexes with calcium salts, making it an indispensable tool for diagnostic and research applications. This product is essential for professionals in histopathology, cytology, and biomedical research who require reliable and consistent staining results.

Application

• Histological Staining: Primarily used in the Kossa staining method for the detection of calcium deposits in tissues, such as in bone, atherosclerotic plaques, and calcified lesions.
• Cytological Analysis: Employed in laboratory protocols to stain calcium-rich structures within cells for microscopic examination.
• Biomedical Research: Serves as a key reagent in studies involving biomineralization, pathological calcification, and metabolic bone diseases.
• Diagnostic Pathology: Aids in the diagnosis of conditions characterized by abnormal calcium metabolism or deposition in clinical tissue samples.
• Quality Control in Manufacturing: Can be used as a reference standard or colorant in the production of specialized diagnostic kits and staining solutions.

Basic Information

Product Name	Nuclear Fast Red
CAS No.	6409-77-4
Molecular Formula	C14H7NNa2O7S2
Molecular Weight	416.32 g/mol
Synonyms	Nuclear Fast Red; Kernechtrot; Calcium Red; Fast Red; Acid Red 119; C.I. 60760; 5-[(2-Hydroxy-1-naphthyl)azo]-4-hydroxy-3-[(4-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt; Kossa Stain
EINECS	229-075-4

Quality Control

Our Nuclear Fast Red is manufactured and tested to ensure high purity and batch-to-batch consistency suitable for diagnostic and research use. Each lot undergoes rigorous analytical testing, including identity confirmation and purity assessment. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee product integrity and support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at room temperature (15-25°C). Keep the container tightly sealed to protect from moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Solubility	Soluble in water, slightly soluble in ethanol
Heavy Metals (as Pb)	≤ 20 ppm

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