4'-Chloro-[1,1'-biphenyl]-4-thiol CAS 21345-09-5
| CAS No. | 21345-09-5 |
| Molecular Formula | C12H9ClS |
| Molecular Weight | 220.72 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 220.72 g/mol gives 4'-Chloro-[1,1'-biphenyl]-4-thiol distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4'-Chloro-[1,1'-biphenyl]-4-thiol (CAS 21345-09-5), molecular formula C12H9ClS and molecular weight 220.72 g/mol, is a CATO reference standard with documented purity and traceability.
4'-Chloro-[1,1'-biphenyl]-4-thiol (C12H9ClS) contains sulfur-containing functionality, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
As a certified reference material (CRM), 4'-Chloro-[1,1'-biphenyl]-4-thiol 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 | C12H9ClS |
| Molecular Weight | 220.72 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
- (4-Chlorophenyl)(phenyl)sulfane (CAS 13343-26-5)
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- 2-(5-(Difluoromethyl)-4,6-difluoropyridin-3-yl)acetic acid (CAS 1804448-98-3)
- 2-(Thiophen-2-yl)isonicotinaldehyde (CAS 1226163-72-9)
- 2-((1-(2-(Benzo[d]thiazol-2-ylthio)ethyl)-2,2,4-trimethyl-1,2,3,4-tetrahydroquinolin-6-yl)methylene)malononitrile (CAS 67752-53-8)
- 2-(3-(Aminomethyl)tetrahydrofuran-3-yl)acetic acid (CAS 1512659-68-5)
- Dansyl-L-alanine (CAS 35021-10-4)
- Ampropylfos (CAS 16606-64-7)
- N-(2-aminoethyl)-4-phenylbutanamide hydrochloride (CAS 861052-88-2)
- Ethyl 2-(3-cyclopropyl-6-ethyl-4-(trifluoromethyl)-1H-pyrazolo[3,4-b]pyridin-1-yl)acetate (CAS 1011378-45-2)
- 4-Methoxy-N-((5-(4-nitrophenyl)-1H-1,2,4-triazol-3-yl)methyl)aniline (CAS 1171939-94-8)
- Semaglutide Impurity 11 (CAS CATO-C4X-222611)
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