Date published: 2026-2-13

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N-Acetyl-S-(2-hydroxy-1-phenylethyl)-L-cysteine + N-Acetyl-S-(2-hydroxy-2-phenylethyl)-L-cysteine (Mixture) (CAS 69278-53-1)

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Alternate Names:
N-Acetyl-S-(1-phenyl-2-hydroxyethyl)-L-cysteine + N-acetyl-S-(2-phenyl-2-hydroxyethyl)-L-cysteine
CAS Number:
69278-53-1
Molecular Weight:
283.34
Molecular Formula:
C13H17NO4S
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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N-Acetyl-S-(2-hydroxy-1-phenylethyl)-L-cysteine + N-Acetyl-S-(2-hydroxy-2-phenylethyl)-L-cysteine (Mixture) is a mixture of 2 regioisomer metabolites of Styrene. Both compounds are structural analogs of L-cysteine, an amino acid. These compounds are characterized by the presence of an acetyl group (N-acetyl) attached to the nitrogen atom of the cysteine molecule and a modified phenylethyl moiety attached to the sulfur atom (S-substitution). The difference between the two compounds lies in the position of the hydroxyl group (-OH) on the phenylethyl moiety, which results in slightly different chemical properties and biological activities. They are analogs of metabolites produced during the metabolism of various xenobiotics.


N-Acetyl-S-(2-hydroxy-1-phenylethyl)-L-cysteine + N-Acetyl-S-(2-hydroxy-2-phenylethyl)-L-cysteine (Mixture) (CAS 69278-53-1) References

  1. Accurate quantification of mercapturic acids of styrene (PHEMAs) in human urine with direct sample injection using automated column-switching high-performance liquid chromatography coupled with tandem mass spectrometry.  |  Reska, M., et al. 2010. Anal Bioanal Chem. 397: 3563-74. PMID: 20556363
  2. Analysis of 18 urinary mercapturic acids by two high-throughput multiplex-LC-MS/MS methods.  |  Pluym, N., et al. 2015. Anal Bioanal Chem. 407: 5463-76. PMID: 25935678
  3. An LC-MS/MS method to profile urinary mercapturic acids, metabolites of electrophilic intermediates of occupational and environmental toxicants.  |  Frigerio, G., et al. 2019. J Chromatogr B Analyt Technol Biomed Life Sci. 1117: 66-76. PMID: 31004848

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

N-Acetyl-S-(2-hydroxy-1-phenylethyl)-L-cysteine + N-Acetyl-S-(2-hydroxy-2-phenylethyl)-L-cysteine (Mixture), 10 mg

sc-207967
10 mg
$337.00