Azide-PEG3-Tos CAS 178685-33-1
| CAS No. | 178685-33-1 |
| Molecular Formula | C13H19N3O5S |
| Molecular Weight | 329.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Azide-PEG3-Tos (CAS 178685-33-1), molecular formula C13H19N3O5S and molecular weight 329.37 g/mol, is a CATO reference standard with documented purity and traceability.
Azide-PEG3-Tos (C13H19N3O5S) 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C13H19N3O5S |
| Molecular Weight | 329.37 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2008 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Azide Standards
- Azide-PEG4-Tos (CAS 168640-82-2)
- Azide-PEG5-Boc (CAS 1415800-41-7)
- Azide-PEG3-C1-Ala (CAS 2054345-67-2)
- Azide-C2-SS-C2-biotin (CAS 1620523-64-9)
- Azide-PEG3-Desthiobiotin (CAS 1426828-06-9)
- Azide-PEG5-Tos (CAS 236754-49-7)
- 11-Azide-3,6,9-triox undecane-1-amine (CAS 134179-38-7)
- Azide-PEG2-Ms (CAS 176520-23-3)
Recommended Standards
- 1-Cyclopropanecarbonyl-4-{[3-(4-fluorophenyl)-1,2,4-oxadiazol-5-yl]methyl}piperidine (CAS 1775302-65-2)
- N-(2-(3-Methyl-1,2,4-oxadiazol-5-yl)thiophen-3-yl)-2-(o-tolyloxy)acetamide (CAS 1796969-67-9)
- Methyl 3-[(4-fluorophenyl)(methyl)sulfamoyl]thiophene-2-carboxylate (CAS 1708401-69-7)
- 4-Methyl-N-(1-methyl-2-oxo-1,2-dihydro-3H-indol-3-yliden)benzenesulfonohydrazide (CAS 1802571-63-6)
- (E)-4-(7-(4-methoxybenzylidene)-3-(4-methoxyphenyl)--hexahydro-2H-indazol-2-yl)-4-oxobutanoic acid (CAS 313648-66-7)
- 2,5-Dimethyl-3-pyrrolidinomethyl benzophenone (CAS 898770-40-6)
- 2-(Difluoromethyl)-3-hydroxy-6-(trifluoromethoxy)pyridine-5-acetic acid (CAS 1804798-01-3)
- tert-Butyl 4-amino-4-(2-fluorobenzyl)piperidine-1-carboxylate (CAS 1707713-78-7)
- 3,4-Dimethoxystyrene (CAS 6380-23-0)
- Lead hexacyanoferrate(II) (CAS 14402-61-0)
- 3-(1-Cyclopropyl-ethoxy)-phenylamine (CAS 1708258-31-4)
- 5-fluoro-2-(piperidin-2-yl)pyridine (CAS 1270471-87-8)
- (2R)-2-[[(2S)-2-aminopropanoyl]amino]propanoic acid;hydrochloride (CAS 148248-25-3)
- Semaglutide impurity 100 (CAS CATO-C4X-2226100)
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