CAS 632-69-9 Rose Bengal Disodium Salt - Analytical Products / Alfa Chemistry

CAT	APB632699
CAS	632-69-9
Structure
Synonyms	Acid Red 94; Rose Bengal sodium salt; Xantryl; Food Red No. 105, sodium salt; PV 10
IUPAC Name	disodium;4,5,6,7-tetrachloro-2',4',5',7'-tetraiodo-3-oxospiro[2-benzofuran-1,9'-xanthene]-3',6'-diolate
Molecular Weight	1017.6
Molecular Formula	C20H2Cl4I4Na2O5

Description	Rose Bengal is an organic compound and belongs to the class of xanthenes. In 1882, Swiss chemist Robert Ghnem synthesized rose bengal as a 4,5,6,7-tetrachloro 2',4',5',7'-tetraiodofluorescein analogue. It is a commonly used dye for detecting damage to the ocular surface epithelium in ocular surface diseases like dry eye and herpetic keratitis.
Appearance	Dark violet solid powder
Storage	Room temperature
Absorption Wavelength	λmax 549 nm
Color Index	45440
Pubchem CID	69438
Pubchem SID	469688486
Uses	It has been used as a diagnostic agent for more than 50 years to identify liver and eye cancer. Its sodium salt is frequently employed in eye drops to color-code injured conjunctival and corneal cells, helping to identify eye injury. Further, the stain is used to prepare foraminifera for microscopic examination, enabling the differentiation between forms that were alive or dead at the time of collecting.