[D-Pen2, Pen5] Enkephalin CAS 88373-72-2
| CAS No. | 88373-72-2 |
| Molecular Formula | C30H39N5O7S2 |
| Molecular Weight | 645.80 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
[D-Pen2, Pen5] Enkephalin (CAS 88373-72-2), molecular formula C30H39N5O7S2 and molecular weight 645.80 g/mol, is a CATO reference standard with documented purity and traceability.
[D-Pen2, Pen5] Enkephalin (C30H39N5O7S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), [D-Pen2, Pen5] Enkephalin 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 | C30H39N5O7S2 |
| Molecular Weight | 645.80 g/mol |
| Purity | 97%+ |
| 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Recommended Standards
- (D-Pen2,D-Pen5)-Enkephalin (CAS 88373-73-3)
- (S)-2,5-bis((tert-Butoxycarbonyl)(3-((tert-butoxycarbonyl)amino)propyl)amino)pentanoic acid (CAS 119798-08-2)
- 5-(2,4-bis(benzyloxy)-5-isopropylphenyl)-N-ethyl-4-(4-(morpholinomethyl)phenyl)isoxazole-3-carboxamide (CAS 747414-24-0)
- methyl 12-((2S,4R)-2-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)-4-hydroxypyrrolidin-1-yl)-12-oxododecanoate (CAS 1159408-69-1)
- N1,N5-Diphenylglutaramide (CAS 6833-02-9)
- 2-(4-Fluorophenyl)-6-(trifluoromethyl)pyrazolo[1,5-a]pyridine (CAS 372122-55-9)
- 2-(3-Chloro-5-iodophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 479411-94-4)
- Ibuprofen impurity 133 (CAS CATO-C4X-1082133)
- 3-Iodo-1H,1H,2H,2H,3H,4H,4H-perfluorodecan-1-ol (CAS 16083-68-4)
- 2-(Chloromethyl)-1,1-dimethylcyclopentane (CAS 77437-95-7)
- Methyl 3,4-dimethyl-2-thioxo-2,3-dihydrothiazole-5-carboxylate (CAS 473827-75-7)
- 3-Acetylphenylboronic acid (CAS 204841-19-0)
- tert-Butyl (2S,4R)-4-amino-2-(difluoromethyl)pyrrolidine-1-carboxylate (CAS 1207852-96-7)
- [His]1-Acetylated Semaglutide (CAS CATO-C4X-2226219)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com