磺基罗丹明101 磺酰氯

Texas Red or sulforhodamine 101 acid chloride is a red fluorescent dye, used in histology for staining cell specimens, for sorting cells with fluorescent-activated cell sorting machines, in fluorescence microscopy applications, and in immunohistochemistry. Texas Red fluoresces at about 615nm, and the peak of its absorption spectrum is at 589nm. The powder is dark purple. Solutions can be excited by a dye laser tuned to 595-605nm, or less efficiently a krypton laser at 567nm. The absorption extinction coefficient at 596nm is about 85,000 M−1cm−1.