Thioctic Acid Impurity 4 CAS 119365-69-4
| CAS No. | 119365-69-4 |
| Molecular Formula | C8H16O2S2 |
| Molecular Weight | 208.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Thioctic Acid Impurity 4 (CAS 119365-69-4) is a certified pharmaceutical impurity reference standard with the molecular formula C8H16O2S2 and a molecular weight of 208.34 g/mol.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, Thioctic Acid Impurity 4 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 208.34 g/mol — guide the selection of appropriate sample preparation and analytical techniques.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Thioctic Acid Impurity 4 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.
Physical & Chemical Properties
| Molecular Formula | C8H16O2S2 |
| Molecular Weight | 208.34 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1991 |
| Sulfur Atoms | 2 |
Related Thioctic Standards
- Thioctic Acid EP Impurity B (CAS 462-20-4)
- Thioctic acid Impurity 70 (CAS CATO-C4X-152670)
- Thioctic acid impurity 60 (CAS 105484-55-7)
- Thioctic acid (CAS 1077-28-7)
- Thioctic acid Impurity 38 (CAS 5238-47-1)
- Thioctic acid Impurity 39 (CAS 5238-48-2)
- Thioctic acid Impurity 5 (CAS 3206-73-3)
- Thioctic Acid Impurity 46 (CAS 940-69-2)
Recommended Standards
- 947-91-1 Acetaldehyde, diphenyl- Benzeneacetaldehyde, alpha-phenyl- (9CI) Diphenylacetaldehyde 4-07-00-01400 (Beilstein Handbook Reference) AI3-20753 BRN 1424292 2,2-Diphenylacetaldehyde Diphenylketen EINECS 213-433-7 NSC 21645 alpha-Phenylbenzeneacetaldehyde (CAS 947-91-1)
- 1,2,3,4,4a,5,6,7-Octahydro-2,2,4a,7,7-pentamethylnaphthyridine 3,3,6,9,9-Pentamethyl-2,10-diazabicyclo[4.4.0]dec-1-ene 69340-58-5 PMDBD (CAS 69340-58-5)
- 1,2,5-oxadiazole-3,4-diylbis[(4-chlorophenyl)methanone] 65938-08-1 KST-1B7051 (CAS 65938-08-1)
- Ebanol(Mixture of isomers) (CAS 67801-20-1)
- Bilastine impurity 116 (CAS 93142-62-2)
- Rabeprazole Impurity 17(See C4X-112130) (CAS CATO-C4X-112117)
- Ribavirin EP Impurity D (CAS 3641-08-5)
- 3-(2-Fluorophenyl)-6-(trifluoromethyl)pyridin-2-amine (CAS 1214351-95-7)
- Ethyl 6-methyl-3-oxo-2,3-dihydropyridazine-4-carboxylate (CAS 2125-90-8)
- 1-(3-Bromophenyl)sulfonylazepane (CAS 1022438-79-4)
- (4-Isopropylpiperazin-1-yl)(piperidin-2-yl)methanone (CAS 1218350-59-4)
- Istradefylline Impurity 15 (CAS 89073-60-9)
- 2-methyl-6-(pyridin-2-yl)pyrimidin-4-amine (CAS 90916-54-4)
- D-Ala35-Tirzepatide (CAS CATO-CPTD788904)
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