Paclitaxel Impurity 37 CAS 31077-81-3
| CAS No. | 31077-81-3 |
| Molecular Formula | C31H38O11 |
| Molecular Weight | 586.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Paclitaxel Impurity 37 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Paclitaxel Impurity 37 (CAS 31077-81-3) is a high-purity analytical reference standard with the molecular formula C31H38O11 and a molecular weight of 586.63 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, Paclitaxel Impurity 37 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 586.63 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C31H38O11 |
| Molecular Weight | 586.63 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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 |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
Related Paclitaxel Standards
- Paclitaxel EP Impurity N (CAS 27548-93-2)
- Paclitaxel Impurity 54 (CAS CATO-C4X-184254)
- Paclitaxel Impurity 34 (CAS 71629-92-0)
- Paclitaxel Impurity 33 (CAS 92950-42-0)
- Paclitaxel Impurity 31 (CAS 171926-87-7)
- Paclitaxel Impurity 21 (CAS 30244-37-2)
- Paclitaxel Impurity 17 (7-(Triethylsilyl)baccatin III) (CAS 115437-21-3)
- Paclitaxel Impurity 17(13-O-(Triethylsilyl) Baccatin III) (CAS 208406-86-4)
Recommended Standards
- Methyl 4-(6-(4-(3-(4-(hydroxymethyl)phenyl)ureido)phenyl)-4-morpholino-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate (CAS 1062172-60-4)
- Tris(2,4-dimethyl-5-sulfophenyl)phosphine trisodium salt (CAS 443150-11-6)
- 3-Hydroxy Midostaurin (CGP52421) (Mixture of Diastereomers) (CAS 179237-49-1)
- DBCO-NHCO-PEG2-maleimide (CAS 2698339-31-8)
- 4-(6-(4-Methylpiperazin-1-yl)-1H,3'H-[2,5'-bibenzo[d]imidazol]-2'-yl)benzenesulfonamide trihydrochloride (CAS 74681-68-8)
- 4-Bromo-6-chloro-1-methoxy-2,7-naphthyridine (CAS 2673370-07-3)
- 4-Nitro-1-(3-phenylpropyl)-1h-pyrazole (CAS 28469-24-1)
- 5,6-Dihydro-8H-imidazo[2,1-c][1,4]thiazine-3-carbaldehyde (CAS 623564-36-3)
- Methyl 1-(4-aminophenyl)cyclobutane-1-carboxylate (CAS 1215017-84-7)
- 2-[(2-phenylethyl)amino]acetic acid hydrochloride (CAS 91197-75-0)
- Doripenem Impurity 9(Sodium Salt) (CAS Doripenem Impurity 20 (Sodium Salt))
- 1-Bromo-2-(cyclohexanesulfonyl)benzene (CAS 1355247-43-6)
- n,3-Dimethyl-1-benzothiophene-2-carboxamide (CAS 18781-48-1)
- Semaglutide Impurity 138 (CAS CATO-C4X-2226138)
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