2'-Chloro-[1,1':3',1''-terphenyl]-4,4'',5'-tricarboxylic acid CAS 2305899-76-5
| CAS No. | 2305899-76-5 |
| Molecular Formula | C21H13ClO6 |
| Molecular Weight | 396.78 g/mol |
| 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 2'-Chloro-[1,1':3',1''-terphenyl]-4,4'',5'-tricarboxylic acid.
2'-Chloro-[1,1':3',1''-terphenyl]-4,4'',5'-tricarboxylic acid (CAS 2305899-76-5), molecular formula C21H13ClO6 and molecular weight 396.78 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2'-Chloro-[1,1':3',1''-terphenyl]-4,4'',5'-tricarboxylic acid (C21H13ClO6) contains a flavonoid core, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 396.78 g/mol, it falls into the moderately-high-molecular-weight range. 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 | C21H13ClO6 |
| Molecular Weight | 396.78 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; 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.) | 1999 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- N-{[2-chloro-6-(1H-pyrrol-1-yl)phenyl]methyl}-3-fluoro-4-(trifluoromethyl)benzamide (CAS 866043-39-2)
- 1-[3-Chloro-5-(trifluoromethyl)pyridin-2-yl]-3-methyl-4-[4-(propan-2-yl)phenyl]-4,5-dihydro-1H-1,2,4-triazol-5-one (CAS 860785-30-4)
- N-(2-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]sulfanyl}ethyl)-2,6-difluorobenzamide (CAS 1708126-04-8)
- (2E)-3-[(4-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]oxy}phenyl)amino]-2-cyanobut-2-enamide (CAS 303153-06-2)
- [(3Z)-5-Chloro-2-oxo-1-{[3-(trifluoromethyl)phenyl]methyl}-2,3-dihydro-1H-indol-3-ylidene]amino acetate (CAS 477864-51-0)
- {3-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]-1,2-oxazol-5-yl}(phenyl)methyl acetate (CAS 861211-79-2)
- 2-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl](methyl)amino}-1-oxo-1,2-dihydroisoquinoline-4-carboxamide (CAS 339106-89-7)
- (S)-2-((4-Chloro-6-((4-nitrophenyl)amino)-1,3,5-triazin-2-yl)amino)pentanedioic acid (CAS 61955-61-1)
Recommended Standards
- Ethyl 4-(3-(4-chlorophenyl)benzo[c]isoxazole-5-carbonyl)isoxazole-3-carboxylate (CAS 337920-31-7)
- (5-((4-Chlorophenyl)sulfonyl)-1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl)methyl acetate (CAS 318469-27-1)
- N-(Benzoyloxy)-N-{[4-(4-chlorophenoxy)-3-nitrophenyl]methylene}amine (CAS 320416-76-0)
- 1-[(2-Chlorophenyl)methyl]-5-oxo-N-[4-(trifluoromethyl)phenyl]pyrrolidine-2-carboxamide (CAS 1008283-06-4)
- N-allyl-4-bromo-1-(p-tolyl)-1H-pyrazole-5-carboxamide (CAS 321571-49-7)
- (3-(3-Bromophenyl)isoxazol-5-yl)methanol (CAS 887574-50-7)
- Isoquinoline-1-carbonitrile (CAS 1198-30-7)
- Ethyl 3-amino-3-(2-fluorophenyl)propanoate (CAS 218165-97-0)
- 5-(5-(4-(4,5-Dihydrooxazol-2-yl)-3-methylphenoxy)pentyl)-3-methylisoxazole (CAS 105639-03-0)
- 4-Bromo-3-propylbenzaldehyde (CAS 254745-39-6)
- N-(3-Chloro-2-methylphenyl)-N-[2-(3-methyl-phenoxy)propyl]amine (CAS 1040688-07-0)
- N-(2-Chloro-4-hydroxyphenyl)benzenesulfonamide (CAS 88680-97-1)
- Pent-3-yn-1-amine hydrochloride (CAS 124618-80-0)
- 3AEEA-Semaglutide(Endo-AEEA-Semaglutide) (CAS CATO-C4X-2226265)
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