Stability of a stilbene tyne fluorescent whitening agent against hypochlorite

M. Blanco, L. Jiménez, L. Valverde

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)


E, E[4,4-bis(2 sulfostyryl)biphenyl] (DSBP) is a stilbene type fluorescent whitening agent (FWA) widely used by the textile and detergent industries. UV and fluorescence spectrophotometry are used to examine its stability against hypochlorite, which may restrict its use and may have an adverse environmental impact because a considerable fraction of the FWA used during the washing process remains in the washing liquor and is discharged into sewers. The degradation of this whitening agent is catalyzed by several transition metal ions usually present in tap water. The catalytic effect decreases in the following sequence for the metal ions tested: Fe2+χMn2+> Cu2+≃ Fe3+The addition of an appropriate chelating agent such as Dequest ® 2006 [diethyleneaminepenta(methylenephosphonic) acid] in a 20:1 mole ratio completely inhibits the process; by contrast, other complex-forming agents such as EDTA accelerate it.
Original languageEnglish
Pages (from-to)130-134
JournalTextile Research Journal
Issue number2
Publication statusPublished - 1 Jan 2001


Dive into the research topics of 'Stability of a stilbene tyne fluorescent whitening agent against hypochlorite'. Together they form a unique fingerprint.

Cite this