Thioctic acid Impurity 39 CAS 5238-48-2
| CAS No. | 5238-48-2 |
| Molecular Formula | C8H15ClO2S |
| Molecular Weight | 210.72 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Thioctic acid Impurity 39 (CAS 5238-48-2), a pharmacopoeial impurity reference standard (molecular formula C8H15ClO2S, MW 210.72 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Thioctic acid Impurity 39 (C8H15ClO2S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Thioctic acid Impurity 39 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C8H15ClO2S |
| Molecular Weight | 210.72 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Thioctic Standards
- Thioctic acid Impurity 38 (CAS 5238-47-1)
- Thioctic Acid Impurity 4 (CAS 119365-69-4)
- Thioctic Acid EP Impurity B (CAS 462-20-4)
- Thioctic acid Impurity 70 (CAS CATO-C4X-152670)
- Thioctic Acid Impurity N8 (CAS 41443-60-1)
- Thioctic acid impurity 60 (CAS 105484-55-7)
- Thioctic acid (CAS 1077-28-7)
- Thioctic acid Impurity 5 (CAS 3206-73-3)
Recommended Standards
- 1-(chloromethyl)-2,4-bis(propan-2-yl)benzene (CAS 122776-87-8)
- (4-Methylphenyl)methanesulfonyl chloride; 4-Methylbenzenemethanesulfonyl chloride; p-Methyl-|A-toluenesulfonyl chloride; p-Tolylmethanesulfonyl chloride 51419-59-1 AB1005513 (CAS 51419-59-1)
- 1-(1-Chloro-3-methylbutyl)-4-ethylbenzene (CAS 1406246-94-3)
- Cyclooctanesulfonyl chloride (CAS 62371-32-8)
- Nicardipine Impurity 34 (CAS CATO-C4X-171034)
- Salbutamol Sulfate EP Impurity L HCl (CAS 898542-81-9（free base）)
- benzenesulfonate (CAS 190730-42-8)
- 6-chloro-1H-indazole-5-carbonitrile (CAS 1312008-67-5)
- 4-Hydroxy Metsulfuron-Methyl (CAS 102394-28-5)
- 2-Butoxy-1-chloro-3-fluoro-5-nitrobenzene (CAS 1881322-32-2)
- Bis(1-(2,6-diethylphenyl)-3,5,5-trimethyl-3-phenylpyrrolidin-2-ylidene)(3-phenyl-1H-inden-1-ylidene)ruthenium(II) dichloride (CAS 2055540-61-7)
- 1-(2-Fluorophenyl)-4-(3-isopropyl-1,2,4-oxadiazol-5-yl)pyrrolidin-2-one (CAS 1172520-68-1)
- 4-Amino-5-ethoxydihydrofuran-2(3H)-one (CAS 370875-23-3)
- Semaglutide impurity 22(OtBu-Ste-γGlu(OtBu)-AEEA-AEEA-OH) (CAS 1118767-16-0)
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