4-chloro-7,8-dihydro-5H-pyrido[4,3-d]pyrimidine-6-carboxylic acid 9H-fluoren-9-ylmethyl ester 916420-25-2 9H-fluoren-9-ylmethyl 4-chloranyl-7,8-dihydro-5H-pyrido[4,3-d]pyrimidine-6-carboxylate A844013 CAS 916420-25-2
| CAS No. | 916420-25-2 |
| Molecular Formula | C22H18ClN3O2 |
| Molecular Weight | 391.85 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-chloro-7,8-dihydro-5H-pyrido[4,3-d]pyrimidine-6-carboxylic acid 9H-fluoren-9-ylmethyl ester 916420-25-2 9H-fluoren-9-ylmethyl 4-chloranyl-7,8-dihydro-5H-pyrido[4,3-d]pyrimidine-6-carboxylate A844013 (CAS 916420-25-2), molecular formula C22H18ClN3O2 and molecular weight 391.85 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C22H18ClN3O2, 4-chloro-7,8-dihydro-5H-pyrido[4,3-d]pyrimidine-6-carboxylic acid 9H-fluoren-9-ylmethyl ester 916420-25-2 9H-fluoren-9-ylmethyl 4-chloranyl-7,8-dihydro-5H-pyrido[4,3-d]pyrimidine-6-carboxylate A844013 contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 391.85 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.
Physical & Chemical Properties
| Molecular Formula | C22H18ClN3O2 |
| Molecular Weight | 391.85 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
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- 2-(Difluoromethyl)-5-hydroxy-4-iodopyridine-3-carboxaldehyde (CAS 1804375-57-2)
- 4-Penten-1-amine (CAS 22537-07-1)
- 3-Chloro-4-(methylsulfanyl)aniline (CAS 5211-01-8)
- Total Chrome In Water (CAS CATO-CCRM106081)
- (S)-3-(Pyridin-3-yl)morpholine (CAS 1213926-51-2)
- (3-(N-methoxysulfamoyl)phenyl)boronic acid (CAS 1704066-72-7)
- 2-Cyclopropoxyterephthalonitrile (CAS 1243386-03-9)
- 2-Fluorocyclopentan-1-amine hydrochloride (CAS 1423025-97-1)
- (4-((4-(Tert-butoxycarbonyl)piperazin-1-yl)sulfonyl)phenyl)boronic acid (CAS 486422-54-2)
- Neuropeptide Y (2-36), amide, porcine (CAS 102961-52-4)
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