Benzthiazide CAS 91-33-8
| CAS No. | 91-33-8 |
| Molecular Formula | C15H14ClN3O4S3 |
| Molecular Weight | 431.94 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 Benzthiazide.
CATO supplies Benzthiazide (CAS 91-33-8), a certified reference material (molecular formula C15H14ClN3O4S3, MW 431.94 g/mol) for analytical method development and quality control.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, Benzthiazide is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 431.94 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C15H14ClN3O4S3 |
| Molecular Weight | 431.94 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 3 |
Related Benzthiazide Standards
Recommended Standards
- N-Benzyl-4-[(4-chlorophenyl)sulfanyl]-2-phenylpyrimidine-5-carboxamide (CAS 477859-41-9)
- 5-Bromo-3-iodopyridin-2-yl trifluoromethanesulfonate (CAS 1261365-85-8)
- 3-(3-Chlorophenyl)-8-((4-ethylphenyl)sulfonyl)-1,4,8-triazaspiro[4.5]dec-3-en-2-one (CAS 1189481-30-8)
- Domperidone-D6 (CAS 1329614-18-7)
- [4-methyl-3-(4-methylphenyl)-2,5-dioxoimidazolidin-1-yl]acetic acid (CAS 1008949-74-3)
- 2-(6-Chloro-4-methylquinolin-2-yl)acetonitrile (CAS 1437433-75-4)
- (2S,5S)-2-Methyl-5-phenylmorpholine hydrochloride (CAS 1821669-94-6)
- (1S)-1-cycloheptylethan-1-ol (CAS 1461689-19-9)
- 6-Chloro-1H-indazole-4-carboxylic acid (CAS 885522-12-3)
- 1-(1H-Benzo[d][1,2,3]triazol-1-yl)-3-(phenylthio)propan-2-one (CAS 305851-12-1)
- 2-Chloro-3-(3,5-dimethyl-1H-pyrazol-1-yl)pyrazine (CAS 1249644-27-6)
- 1-Cyclopropyl-3-(thiophen-2-yl)-1-(2-(thiophen-2-yl)ethyl)urea (CAS 1396800-44-4)
- 2,2-Difluoro-1-(3-fluoro-4-methylphenyl)ethan-1-one (CAS 1352217-39-0)
- Tirzepatide Impurity 37 (CAS CATO-C4X-324037)
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