Description

Rose Bengal is a synthetic, water-soluble xanthene dye widely recognized for its vivid pink to red color and unique photochemical properties. Its primary commercial value lies in its dual functionality as a vital biological stain for diagnostic applications and as a potent photosensitizer in advanced oxidation processes. This compound is essential for manufacturers and research institutions in the pharmaceutical, diagnostic, environmental technology, and textile industries, where precise colorants and reactive agents are required.

Application

• Diagnostic Staining: Used as a vital stain in ophthalmology for diagnosing corneal injuries and in microbiology for plate assays.
• Photosensitizer: Employed in photodynamic therapy (PDT) research and in advanced oxidation processes (AOPs) for water treatment and environmental remediation.
• Biological Research: Serves as a selective stain for dead cells in viability assays and for visualizing certain fungi and bacteria.
• Textile Dyeing: Acts as a colorant for silk, wool, and other protein-based fibers.
• Photographic Sensitizer: Historically used in color photography and holography.
• Indicator: Can be used as a pH indicator, changing color in specific acidic to basic ranges.

Basic Information

Product Name	Rose Bengal
CAS No.	11121-48-5
Molecular Formula	C20H2Cl4I4Na2O5
Molecular Weight	1017.64 g/mol
Synonyms	Acid Red 94; C.I. 45440; Bengal Rose B; Rose Bengal Sodium Salt; 4,5,6,7-Tetrachloro-2',4',5',7'-tetraiodofluorescein disodium salt; Phloxine B; Tetraiodotetrachlorofluorescein
EINECS	234-365-4

Quality Control

Our Rose Bengal is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for color value, and tests for heavy metals and residual solvents, ensuring it meets the stringent requirements for diagnostic and research applications. Certificates of Analysis (COA) with detailed specifications are provided for every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Keep away from incompatible materials and strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark Pink to Red Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 85.0%
Loss on Drying	≤ 10.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH Guidelines
pH (1% Solution)	6.0 - 8.0

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