DTPD Oekanal（N N'-Ditolylparaphenylene） CAS 620-91-7
| CAS No. | 620-91-7 |
| Molecular Formula | C20H20N2 |
| Molecular Weight | 288.39 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 288.39 g/mol gives DTPD Oekanal（N N'-Ditolylparaphenylene） distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
DTPD Oekanal（N N'-Ditolylparaphenylene） (CAS 620-91-7), molecular formula C20H20N2 and molecular weight 288.39 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, DTPD Oekanal（N N'-Ditolylparaphenylene） (C20H20N2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 288.39 g/mol, it falls into the medium-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 | C20H20N2 |
| Molecular Weight | 288.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Recommended Standards
- N,N''-Bis(methylphenyl)-1,4-benzenediamine (CAS 27417-40-9)
- 4-(5-(3-Phenylpropyl)thiophen-2-yl)butanoic acid (CAS 142260-66-0)
- Alpha-Hydroxy Metoprolol-d5 (Mixture of Diastereomers) (CAS 1189934-03-9)
- (1R,2S,5R)-2-Isopropyl-5-methylcyclohexyl(2R,5S)-5-hydroxy-1,3-oxathiolane-2-carboxylate (CAS 147027-08-5)
- 2,2-Dimethyl-3-(tetrahydrofuran-2-yl)propan-1-ol (CAS 1196044-34-4)
- N-cyclopentylhydroxylamine hydrochloride (CAS 60568-18-5)
- 8-Hydroxyimidazo[1,2-a]pyridine-2-carboxylic acid (CAS 1041004-62-9)
- Ethyl 4-amino-4-(4-methoxyphenyl)butanoate (CAS 1178344-35-8)
- Dicyclohexylzinc solution (CAS 15658-08-9)
- 5-Chloro-N-(1h-indazol-3-yl)furan-2-carboxamide (CAS 1258676-97-9)
- 2,4-Dichloro-5-nitroquinoline (CAS 1584664-29-8)
- Upadacitinib Impurity 129 (CAS CATO-C4X-2405129)
- 5-Amino-4-(((benzyloxy)carbonyl)amino)-5-oxopentanoic acid (CAS 932735-43-8)
- 59880-97-6 Chemotactic peptide F-Met-Leu-Phe L-Phenylalanine, N-(N-(N-formyl-L-methionyl)-L-leucyl)- N-Formyl-L-methionyl-L-leucyl-L-phenylalanine N-Formyl-Met-Leu-Phe N-Formylmethionine leucyl-phenylalanine fMLF fMLP (misnomer but widely used) (CAS 59880-97-6)
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