SPDP-dPEG<SUP>®</SUP><SUB>8</SUB>-NHS ester CAS 1252257-56-9
| CAS No. | 1252257-56-9 |
| Molecular Formula | C31H49N3O13S2 |
| Molecular Weight | 735.86 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including SPDP-dPEG<SUP>®</SUP><SUB>8</SUB>-NHS ester.
SPDP-dPEG<SUP>®</SUP><SUB>8</SUB>-NHS ester (CAS 1252257-56-9), molecular formula C31H49N3O13S2 and molecular weight 735.86 g/mol, is a CATO reference standard with documented purity and traceability.
SPDP-dPEG<SUP>®</SUP><SUB>8</SUB>-NHS ester (C31H49N3O13S2) 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures SPDP-dPEG<SUP>®</SUP><SUB>8</SUB>-NHS ester under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C31H49N3O13S2 |
| Molecular Weight | 735.86 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 2 |
Related SPDP Standards
- SPDP-PEG24-acid (CAS 1334177-97-7)
- SPDP-PEG6-NHS ester (CAS 1818294-32-4)
- PC SPDP-NHS carbonate ester (CAS 2279944-61-3)
- SPDP-dPEG<SUP>®</SUP><SUB>4</SUB>-NHS ester (CAS 1334177-95-5)
- SPDP-PEG12-NHS ester (CAS 2601437-72-1)
- PEG4-SPDP (CAS 1305053-43-3)
- SPDP-PEG4-acid (CAS 581065-97-6)
- SPDP-sulfo (CAS 121115-30-8)
Recommended Standards
- Cabazitaxel Impurity 25 (CAS 1638286-64-2)
- Liwaconitine (CAS 86408-15-3)
- Rilapladib - API Standards (CAS 412950-08-4)
- m-PEG16-NH2 (CAS 907577-50-8)
- 4-Ethyl-1-methyl-1H-pyrrole-2-carbonitrile (CAS 123476-65-3)
- (S)-Morpholine-2-carbonitrile (CAS 1359658-57-3)
- 2-Methyl-6-tosylpyrazolo[1,5-a]pyrimidin-7-amine (CAS 439108-95-9)
- 872-55-9 E5616Q8745 2-Ethylthiophene Thiophene, 2-ethyl- EINECS 212-830-2 UNII-E5616Q8745 (CAS 872-55-9)
- Aspirin Impurity 8 (CAS 18698-59-4)
- 1-Ethyl-1,2,3,6-tetrahydro-4-(methylthio)-1,3,5-triazine Hydroiodide (CAS 1189289-64-2)
- Ethanesulfonic acid, 2-[[(2S)-2-amino-3-(1H-indol-3-yl)-1-oxopropyl]amino]- (CAS 1460283-82-2)
- Fmoc-Lys(Ac)-OH (CAS 159766-56-0)
- 6-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-((2-(trimethylsilyl)ethoxy)methyl)isoquinolin-1(2H)-one (CAS 2818961-76-9)
- D-Asp9-Tirzepatide (CAS CATO-CPTD788923)
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