L-Alanine benzyl ester p-toluenesulfonate salt, CAS 42854-62-6, is the tosylate salt of a protected amino acid ester and is therefore a process-related organic impurity rather than a classical genotoxic alerting structure. With molecular formula C17H21NO5S and molecular weight 351.42 g/mol, it may arise from incomplete esterification, salt formation, or carryover of benzylated intermediates in peptide or amino acid synthesis. Its ionic character and aromatic sulfonate moiety typically require LC-MS/MS for trace quantification, while LC-UV or HILIC methods may support separation from polar related substances. Stability is governed by hydrolysis and ion-pairing behavior.
References
Abou Fayad, Antoine, et al. “A One-Pot Synthesis of Symmetrical and Unsymmetrical Dipeptide Ureas.â€Â St-Andrews.ac.uk, July 2016,  https://doi.org/1434-193X.
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Functional
Toujours activé
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Functional
Toujours activé
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
