Semaglutide Impurity 18 CAS 1671100-14-3
| CAS No. | 1671100-14-3 |
| Molecular Formula | C37H68N2O10 |
| Molecular Weight | 700.94 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Semaglutide Impurity 18 (CAS 1671100-14-3), a pharmacopoeial impurity reference standard (molecular formula C37H68N2O10, MW 700.94 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C37H68N2O10, Semaglutide Impurity 18 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 700.94 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Semaglutide Impurity 18 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C37H68N2O10 |
| Molecular Weight | 700.94 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 2 |
Related Semaglutide Standards
- Semaglutide Impurity 2 (CAS CATO-C4X-22262)
- Semaglutide impurity 272 (CAS CATO-C4X-2226272)
- Semaglutide impurity 31 (CAS CATO-C4X-222631)
- Semaglutide impurity 244(Fmoc-His(Fmoc)-Aib-OH) (CAS CATO-C4X-2226244)
- Semaglutide Impurity 246 (CAS CATO-C4X-2226246)
- Semaglutide Impurity 146 (CAS 2645421-68-5)
- Semaglutide Impurity 21(HO-Ste-L-γGlu-AEEA-AEEA-OH) (CAS 1335440-44-2)
- Semaglutide impurity 86 (CAS CATO-C4X-222686)
Recommended Standards
- 26316-40-5 33F4HZ53CP Tetronic 701 1,2-Ethanediamine, polymer with 2-methyloxirane and oxirane 1,2-Ethanediamine, polymer with methyloxirane and oxirane Ethylenediamine, ethoxylated and propoxylated 1,2-Ethanediamine, methyloxirane, oxirane polymer Ethoxylated, propoxylated ethylenediamine 1,2-Ethanediamine propylene oxide ethylene oxide polymer UNII-33F4HZ53CP EC 500-047-1 Ethylene oxide-propylene oxide copolymer ethylenediamine ether 1, 2-Ethanediamine, polymer with methyl oxirane and oxirane, minimum number average molecular weight (in amu), 1,100 (CAS 26316-40-5)
- Methyl L-leucyl-L-leucinate (CAS 13022-42-9)
- N,N'-(((1E,1'E)-1,4-Phenylenebis(ethene-2,1-diyl))bis(4,1-phenylene))bis(2-ethyl-6-methyl-N-phenylaniline) (CAS 954497-18-8)
- [2-[3-[methyl-[1-(naphthalene-2-carbonyl)piperidin-4-yl]carbamoyl]naphthalen-2-yl]-1-naphthalen-1-yl-2-oxoethyl]phosphonic acid (CAS 518062-14-1)
- Resmetirom impurity 109 (CAS CATO-C4X-2912109)
- Tiopronin Impurity 8 (CAS CATO-C4X-15168)
- Etrasimod Impurity 46 (CAS CATO-C4X-321446)
- 10-Fluoro-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine (CAS 1823956-89-3)
- 3-(Hydroxymethyl)-2-nitrobenzoic Acid (CAS 1187238-35-2)
- 4-(2,6-Difluorophenyl)-1,2,3,4-tetrahydro-6-methyl-2-oxo-5-pyrimidinecarboxylic acid ethyl ester (CAS 406468-02-8)
- 2,3-Dimethyl-5-(1H-tetrazol-1-yl)aniline (CAS 954328-84-8)
- Benzyl (3S,4S)-4-amino-3-fluoropiperidine-1-carboxylate (CAS 1523530-09-7)
- 1-(4-Amino-2-chloro-5-fluorophenyl)ethanone (CAS 1260657-47-3)
- Neuropeptide Y, porcine (CAS 82785-45-3)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com