Tau Peptide (245-274) (Repeat 1 Domain) trifluoroacetate salt CAS 1428134-39-7
| CAS No. | 1428134-39-7 |
| Molecular Formula | C136H230N40O42S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 3243.66 g/mol gives Tau Peptide (245-274) (Repeat 1 Domain) trifluoroacetate salt distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Tau Peptide (245-274) (Repeat 1 Domain) trifluoroacetate salt (CAS 1428134-39-7), molecular formula C136H230N40O42SC2HF3O2 and molecular weight 3243.66 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C136H230N40O42SC2HF3O2, Tau Peptide (245-274) (Repeat 1 Domain) trifluoroacetate salt contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 3243.66 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C136H230N40O42S C2HF3O2 |
| Molecular Weight | 3243.66 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.) | 1991 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 40 |
| 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
- 3-(5-Methyl-2-furanyl)-1-propanol (CAS 17162-95-7)
- 1,3,5-tris[(3-methylphenyl)phenylamino]benzene (CAS 138143-23-4)
- N-(4-(tert-butyl)phenyl)-1,1,1-trifluoro-N-((trifluoromethyl)sulfonyl)methanesulfonamide (CAS 121287-02-3)
- Tert-butyl (S)-2-butylpiperazine-1-carboxylate hydrochloride (CAS 1217482-46-6)
- (3-(N-Methylacetamido)phenyl)boronic acid (CAS 325715-08-0)
- 4-(4-Chlorobenzamido)-1-methyl-1H-pyrrole-2-carboxylic acid (CAS 478804-04-5)
- 2-(1-Bromonaphthalen-2-yloxy)-N-(pyridin-3-yl)acetamide (CAS 712325-30-9)
- N-(oct-7-en-1-yl)thietan-3-amine (CAS 1865108-97-9)
- (4-Bromobutyl)cyclopropane (CAS 108294-64-0)
- FMRF Amide Related Peptide. (CAS 149471-12-5)
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