Analysis Note

Color (visual): white to yellow to beigeAppearance of substance (visual): powderIdentity (IR): passes testAssay (HPLC, area%): ≥ 98.0 % (a/a)

General description

Fmoc-TOAC-OH is a useful tool for the incorporation of the ESR spin-label TOAC into peptide sequences [1]. Incorporation of this derivative and the following residue is best achieved using HATU activation. TFA/water/TIS should be used for cleavage of TOAC-containing peptides. The use of EDT should be avoided as it can cause permanent reduction of the nitroxide radical [2]. Following cleavage, the TOAC peptide should be treated with aqueous ammonia in air to regenerate the nitroxide from the hydroxylamine that is generated by the TFA treatment.

Legal Information

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