Fluorescent brightener 28 (Technical Grade)

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Fluorescent brightener 28 (Technical Grade) is a fluorescent whitening agent commonly used in the padding process of the textile industry. Fluorescent brightener 28 is capable of staining polysaccharides such as cellulose, and when the plasma membrane ruptures, it also weakly stains the cytoplasm and strongly stains the cell nucleus. Additionally, Fluorescent brightener 28 can be utilized to detect intracellular chitin in living cells. Fluorescent Brightener 28 also is a visible light emitting diode (LED)-light sensitive photoinitiator for free radical photopolymerizations.

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Fluorescent brightener 28 (Technical Grade) Chemical Structure

CAS No. : 4404-43-7

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Description	Fluorescent brightener 28 (Technical Grade) is a fluorescent whitening agent commonly used in the padding process of the textile industry. Fluorescent brightener 28 is capable of staining polysaccharides such as cellulose, and when the plasma membrane ruptures, it also weakly stains the cytoplasm and strongly stains the cell nucleus. Additionally, Fluorescent brightener 28 can be utilized to detect intracellular chitin in living cells. Fluorescent Brightener 28 also is a visible light emitting diode (LED)-light sensitive photoinitiator for free radical photopolymerizations^[1]^[2]^[3].
Molecular Weight	916.98
Formula	C₄₀H₄₄N₁₂O₁₀S₂
CAS No.	4404-43-7
SMILES	OCCN(CCO)C1=NC(NC2=CC=CC=C2)=NC(NC3=CC(S(=O)(O)=O)=C(C=C3)/C=C/C4=C(S(=O)(O)=O)C=C(NC5=NC(NC6=CC=CC=C6)=NC(N(CCO)CCO)=N5)C=C4)=N1
Shipping	Room temperature in continental US; may vary elsewhere.
Storage	Please store the product under the recommended conditions in the Certificate of Analysis.
Purity & Documentation	Data Sheet (269 KB) Handling Instructions (2659 KB)
References	[1]. Levene R, et al. The Enhancement of Fluorescence During Pad-Batch Whitening of Cotton Cloth 1[J]. Textile Research Journal, 1981, 51(9): 559-563. [2]. Nakazato Y,et al. Live Detection of Intracellular Chitin in Butterfly Wing Epithelial Cells In Vivo Using Fluorescent Brightener 28: Implications for the Development of Scales and Color Patterns. Insects. 2023 Sep 8;14(9):753. [Content Brief] [3]. Xiaoling Zuo, et al. Fluorescent Brighteners as Visible LED-Light Sensitive Photoinitiators for Free Radical Photopolymerizations. Macromol Rapid Commun. 2016 May;37(10):840-4. [Content Brief]