Tau Peptide (275-305) (Repeat 2 Domain) trifluoroacetate salt CAS 330456-25-2
| CAS No. | 330456-25-2 |
| Molecular Formula | C139H239N43O45S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Tau Peptide (275-305) (Repeat 2 Domain) trifluoroacetate salt is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Tau Peptide (275-305) (Repeat 2 Domain) trifluoroacetate salt (CAS 330456-25-2), molecular formula C139H239N43O45SC2HF3O2 and molecular weight 3378.78 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Tau Peptide (275-305) (Repeat 2 Domain) trifluoroacetate salt (C139H239N43O45SC2HF3O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 42.0, corresponding to approximately 42 ring(s) or double-bond equivalent(s). With a molecular weight of 3378.78 g/mol, it falls into the high-molecular-weight range. 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.
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 | C139H239N43O45S C2HF3O2 |
| Molecular Weight | 3378.78 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 42.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 43 |
| Sulfur Atoms | 1 |
Related Tau Standards
- Tau Peptide (306-317) trifluoroacetate salt (CAS 1003007-59-7)
- Peptide Impurity 82 (CAS 10491-78-8)
- Peptide T (CAS 106362-32-7)
- Peptide WE-14 (CAS 115136-18-0)
- Peptide YY (human) trifluoroacetate salt (CAS 118997-30-1)
- Peptide Impurity 15 (CAS 1227750-69-7)
- Peptide YY (3-36) (human) (CAS 123583-37-9)
- Tau Peptide (379-408) trifluoroacetate salt (CAS 1246357-53-8)
Recommended Standards
- 4-(1-Ethyl-1h-imidazol-2-yl)butanoic acid (CAS 1531775-72-0)
- 2-(4-(2-Hydroxy-3-(2-methoxyphenoxy)propyl)piperazin-1-yl)acetic acid (CAS 172430-48-7)
- 2-(Difluoromethyl)-6-iodo-3-nitropyridine-4-carboxaldehyde (CAS 1805193-55-8)
- 4-((2-(Dimethylamino)ethyl)amino)-6-phenylpyridazin-3(2H)-one (CAS 89868-08-6)
- Methyl 7-chloro-4-hydroxy-8-methylquinoline-3-carboxylate (CAS 1820665-11-9)
- Methyl 2-fluoro-5-hydroxybenzoate (CAS 1084801-91-1)
- N-(4-Oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-2-yl)-2,2-dimethylpropanamide (CAS 137281-08-4)
- Cyclobutyl 2-pyridyl ketone (CAS 515154-32-2)
- Taletrectinib Impurity1 (CAS 928333-30-6)
- Semaglutide impurity 40 (CAS CATO-C4X-222640)
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