11-[5-(Dimethylamino)-1-naphthalenesulfonylamino]undecanoic acid

BioReagent, suitable for fluorescence, ≥98.0% (TLC)

DAUDA, 11-(Dansylamino)undecanoic acid
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
MDL number:
PubChem Substance ID:

Quality Level

product line



≥98.0% (TLC)


DMSO: soluble
methanol: soluble


λex 335 nm; λem 516 nm in methanol


suitable for fluorescence

storage temp.


SMILES string




InChI key



11-[5-(Dimethylamino)-1-naphthalenesulfonylamino]undecanoic acid (DAUDA), a dansyl-type fluorophore, is widely used as a hydrophobic binding site probe to identify and characterize the binding sites of medium chain fatty acids, their derivatives and other hydrophobic compounds on molecules such as proteins.


100 mg in glass bottle
Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

HPLC determination of fatty acid binding proteins in rat liver with fluorescence detection


Exclamation mark

Signal Word


Hazard Statements

Precautionary Statements

Target Organs

Respiratory system

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
M Lechner et al.
The Biochemical journal, 356(Pt 1), 129-135 (2001-05-05)
Human tear lipocalin [lipocalin 1 (lcn-1); von Ebner's gland protein] is a member of the lipocalin superfamily that is known to bind an unusual variety of lipophilic ligands. Because of its properties and its tissue-specific expression it has been suggested...
J K Davies et al.
Biochemistry, 38(51), 16932-16940 (1999-12-22)
A number of intracellular proteins bind to negatively charged phospholipid membranes, and this interfacial binding results in a conformational change that modulates the activity of the protein. Using a fluorescent fatty acid analogue, 11-[5-(dimethylamino)naphthalenesulfonyl]undecanoic acid (DAUDA), it is possible to...
A Timanova et al.
European journal of biochemistry, 261(2), 569-576 (1999-04-24)
A fatty acid-binding protein from the nematode Ascaridia galli was characterized. The gene was isolated and recombinantly expressed in Escherichia coli. According to the deduced amino acid sequence A. galli fatty acid-binding protein (AgFABP) belongs to the family of nematode...
Fen Qiao et al.
PloS one, 11(8), e0160003-e0160003 (2016-08-02)
Heterodera avenae and H. filipjevi are major parasites of wheat, reducing production worldwide. Both are sedentary endoparasitic nematodes, and their development and parasitism depend strongly on nutrients obtained from hosts. Secreted fatty acid- and retinol-binding (FAR) proteins are nematode-specific lipid...
A Nahili Giorello et al.
Parasites & vectors, 10(1), 446-446 (2017-09-29)
The giant kidney worm, Dioctophyme renale, is a debilitating and potentially lethal parasite that inhabits and destroys, typically host's right kidney, and may also be found in ectopic sites. It is circumglobally distributed, mainly in dogs, and is increasingly regarded...

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