Pharmaceutical impurities and reference standards play a crucial role in ensuring the quality, safety, and efficacy of drug substances and formulations. Impurities are unintended substancesthat may arise during the synthesis, storage, or degradation of an API. Regulatory authorities mandate stringent impurity profiling and qualification to meet global compliance standards. Reference standards, on the other hand, serve as highly pure benchmarks for analytical testing, helping researchers and manufacturers confirm the identity, purity, and potency of pharmaceutical compounds. Their accurate characterization is essential for maintaining consistency and reliability in drug development and production.
At Zasya Life Sciences, we specialize in the custom synthesis of pharmaceutical impurities, offering tailored solutions to meet the unique needs of our clients. Our team of skilled scientists, backed by deep expertise in synthetic chemistry, provides high-quality impurities that are often challenging to source in the market. Whether it’s process-related, degradation, or API intermediates, we ensure the highest purity and analytical characterization to support regulatory submissions and R&D requirements.
Zasya extends its capabilities to peptide impurities, offering them exclusively through custom synthesis. Our expertise in complex molecular modifications allows us to design and synthesize peptide-related impurities that align with stringent research and quality control needs. With a commitment to innovation and excellence, we aim to be a trusted partner in impurity profiling, delivering superior-quality solutions with precision and reliability.
CAS No: 7170-01-6,
Mol.F: C3H5N3
Mol.Wt: 83.09
Inv. Status: In Stock
CAS No: 4917-56-0
Mol.F: C8H9NNaO3S
Mol.Wt: 222.22
Inv. Status: In Stock
CAS No: 56227-55-5
Mol.F: C11H15ClN2O
Mol.Wt: 226.70
Inv. Status: In Stock
![2-(7-bromo-4-methoxy-1H-pyrrolo[2,3-c]pyridin-3-yl)-2-oxoacetic acid](https://zasya.com/wp-content/uploads/2026/08/954215-12-4-1.png)
CAS No: 954215-12-4
Mol.F: C10H7BrN2O4
Mol.Wt: 299.08
Inv. Status: In Stock
![7-bromo-4-methoxy-1H-pyrrolo[2,3-c]pyridine](https://zasya.com/wp-content/uploads/2026/08/619331-35-0-1.png)
CAS No: 619331-35-0
Mol.F: C8H7BrN2O
Mol.Wt: 227.08
Inv. Status: In Stock
![4-methoxy-1-(phenylsulfonyl)-1H-pyrrolo[2,3-c]pyridine](https://zasya.com/wp-content/uploads/2026/08/1421517-99-8-1.png)
CAS No: 1421517-99-8
Mol.F: C14H12N2O3S
Mol.Wt: 288.32
Inv. Status: In Stock
![1-(phenylsulfonyl)-6-tosyl-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-4(5H)-one](https://zasya.com/wp-content/uploads/2026/08/1627136-94-0-1.png)
CAS No: 1627136-94-0
Mol.F: C20H18N2O5S2
Mol.Wt: 430.50
Inv. Status: In Stock
CAS No: 81453-98-7
Mol.F: C12H11NO3S
Mol.Wt: 249.29
Inv. Status: In Stock
CAS No: 16851-82-4
Mol.F: C10H9NO2S
Mol.Wt: 207.25
Inv. Status: In Stock
CAS No: 2514773-76-1
Mol.F: C19H25NO4
Mol.Wt: 331.41
Inv. Status: In Stock
CAS No: 942195-55-3
Mol.F: C20H19F2N3O3
Mol.Wt: 387.39
Inv. Status: In Stock
![(S)-1-Benzyl-4-((5,7-difluorochroman-4-yl)oxy)-N,N,2-trimethyl-1H-benzo[d]imidazole-6-carboxamide](https://zasya.com/wp-content/uploads/2026/08/2975125-72-3-1.png)
Inv. Status: In Stock
CAS No: 1270294-05-7
Mol.F: C9H8F2O2
Mol.Wt: 186.16
Inv. Status: In Stock
CAS No: 844648-22-2
Mol.F: C9H6F2O2
Mol.Wt: 184.14
Inv. Status: In Stock
![1-Benzyl-4-hydroxy-N,N,2-trimethyl-1H-benzo[d]imidazole-6-carboxamide](https://zasya.com/wp-content/uploads/2026/08/1640981-20-9-1.png)
Inv. Status: In Stock
![1-Benzyl-4-hydroxy-2-methyl-1H-benzo[d]imidazole-6-carboxylic acid](https://zasya.com/wp-content/uploads/2026/08/1640981-19-6-1.png)
CAS No: 1640981-19-6
Mol.F: C16H14N2O3
Mol.Wt: 282.3
Inv. Status: In Stock
![Ethyl 4-acetoxy-1-benzyl-2-methyl-1H-benzo[d]imidazole-6-carboxylate](https://zasya.com/wp-content/uploads/2026/08/1640981-11-8-1.png)
CAS No: 1640981-11-8
Mol.F: C20H20N2O4
Mol.Wt: 352.39
Inv. Status: In Stock
CAS No: 39269-74-4
Mol.F: C12H12N2O
Mol.Wt: 200.24
Inv. Status: In Stock
CAS No: 1095824-77-3
Mol.F: C6H5Cl2F3N2
Mol.Wt: 233.02
Inv. Status: In Stock
CAS No: 1095823-58-7
Mol.F: C12H8ClF3N4O2S
Mol.Wt: 364.73
Inv. Status: In Stock
CAS No: 1095825-46-9
Mol.F: C12H7ClF3N3O2S
Mol.Wt: 349.71
Inv. Status: In Stock
CAS No: 1095824-76-2
Mol.F: C6H5NO3S
Mol.Wt: 171.17
Inv. Status: In Stock
CAS No: 1909309-55-2
Mol.F: C8H9NO4S
Mol.Wt: 215.22
Inv. Status: In Stock
CAS No: 24295-06-5
Mol.F: C7H9NO2S
Mol.Wt: 171.21
Inv. Status: In Stock
CAS No: 24295-03-2
Inv. Status: In Stock
CAS No: 15722-48-2
Mol.F: C14H10N2O6
Mol.Wt: 302.24
Inv. Status: In Stock
CAS No: 868540-17-4
Mol.F: C40H57N5O7
Mol.Wt: 719.92
Inv. Status: In Stock
