Rose bengal (4,5,6,7-tetrachloro-2`,4`,5`,7`-tetraiodofluorescein) is a stain. Its sodium salt is commonly used in eye drops to stain damaged conjunctival and corneal cells and thereby identify damage to the eye. The stain is also used in the preparation of Foraminifera for microscopic analysis, allowing the distinction between forms that were...
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http://en.wikipedia.org/wiki/Rose_bengal
<chemical> 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',4',5',7'-tetraiodospiro(isobenzofuran-1(3h),9'-(9h)xanthen)-3-one dipotassium salt. A bright bluish pink compound that has been used as a dye, biological stain, and diagnostic aid. ... Pharmacological action: fluorescent dyes. ... Chemical name: Rose Bengal ... (12 Dec 1998) ...
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http://www.encyclo.co.uk/local/20973
Type: Term Pronunciation: rōz′ ben′găl Definitions: 1. The sodium salt of tetraiodotetra-chlorfluorescein, used as a stain for bacteria, as a stain in the diagnosis of keratitis sicca, and formerly in liver function tests.
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