LL-37 KRI CAS 672333-78-7
| CAS No. | 672333-78-7 |
| Molecular Formula | C109H190N36O29 |
| Molecular Weight | N/A |
| 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 LL-37 KRI.
LL-37 KRI (CAS 672333-78-7) is a high-purity analytical reference standard with the molecular formula C109H190N36O29C2HF3O2 and a molecular weight of 2582.96 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, LL-37 KRI is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 2582.96 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C109H190N36O29 C2HF3O2 |
| Molecular Weight | 2582.96 g/mol |
| Purity | >95% |
| 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) | 33.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 36 |
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- 4-Hydroxyphenanthrene (CAS 7651-86-7)
- 4-(Methoxymethyl)furan-3-carboxylic acid (CAS 88550-25-8)
- Tofacitinib Impurity 229 (CAS CATO-C4X-1079229)
- Semaglutide impurity 76 (CAS CATO-C4X-222676)
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