ROSE BENGAL

Base Information

• Chemical Name: ROSE BENGAL
• CAS No.: 632-68-8
• Molecular Formula: C20H2Cl4I4K2O5
• Molecular Weight: 1049.8534
• Mol file: 632-68-8.mol

Synonyms:Rose bengal;

Chemical Property of ROSE BENGAL

Chemical Property:

• Boiling Point: 757.8 °C at 760 mmHg
• Flash Point: 412.1 °C
• PSA: 81.65000
• LogP: 9.57420

Purity/Quality:

99% ^*data from raw suppliers

Rose bengal ≥98%(HPLC) ^*data from reagent suppliers

Safty Information:

• Safety Statements: 22-24/25

MSDS Files:

SDS file from LookChem

Useful:

Refernces

PHOTOOXYGENATION OF PTERIDIN-2,4,7-TRIONES

10.1016/S0040-4020(01)96029-6

The research investigates the photooxygenation of pteridin-2,4,7-triones, focusing on synthesizing and examining the thermal reactions of pteridin-2,4,7-trione 6,8'-endoperoxides. The study aims to explore the reactivity of these endoperoxides and their potential as sources of singlet oxygen. Key chemicals include pteridin-2,4,7-triones (1), which react with singlet oxygen to form stable endoperoxides (2-5). Dye-sensitized photooxygenation using sensitizers like rose bengal and methylene blue in solvents such as dichloromethane and methanol is employed to produce these endoperoxides. The endoperoxide (2a) is found to revert to the starting pteridin-2,4,7-trione (la) upon heating, liberating singlet oxygen, confirmed by trapping experiments with various singlet oxygen acceptors. The study concludes that pteridin-2,4,7-trione endoperoxides can serve as effective singlet oxygen generators, offering a stable and storable means of producing singlet oxygen for chemical applications. In the research, rose bengal and methylene blue serve as sensitizers in the dye-sensitized photooxygenation process. Their primary role is to facilitate the reaction of pteridin-2,4,7-triones with singlet oxygen, enhancing the efficiency of endoperoxide formation. Specifically, these dyes absorb visible light and transfer the energy to molecular oxygen, generating singlet oxygen, which then reacts with the pteridin-2,4,7-triones to form the desired endoperoxides.