Fluorescent brightener 28 is a fluorescent probe.1 It has been used to image chitin in pale grass blue butterfly (Z. maha) wings and beta-glucans and glycans in the cell walls of cucumber plant stem and root tissues. Fluorescent brightener 28 displays an emission maximum of 430nm upon excitation at 360nm. Formulations containing fluorescent brightener 28 have been used as brightening agents in soap, paper, and cotton fabrics. Emission: 430nm Excitation: 360nm Synonyms: 2,2'-(1,2-ethenediyl)bis[5-[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]-benzenesulfonic acid, disodium, Calcofluor White LRP, Calcofluor White M2R, Calcofluor White ST, Cellufluor, CFW, C.I. 40622, FB28, Fluostain I, UNPA-GX CAS No: 4193-55-9 Molecular Formula: C40H42N12O10S2Na2 Molecular Weight: 960.95 Appearance: As reported Purity: As reported Melting Point: 300C Refractive Index: n20D 1.75 (Predicted) pK Values: pKa: -1.38, pKb: 4.38 Solubility: Methanol: Sparingly soluble: 1-10mg/ml Storage and Stability: May be stored at RT for short-term only. Long-term storage is recommended at 4C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.
Molecular Weight:
960.95
Purity:
As reported
Form:
As reported
CAS Number:
[4193-55-9]
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