Benzo[d]isothiazole CAS 272-16-2
| CAS No. | 272-16-2 |
| Molecular Formula | C7H5NS |
| Molecular Weight | 135.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Benzo[d]isothiazole is closely related to a nitrile group, sulfur-containing functionality, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Benzo[d]isothiazole (CAS 272-16-2) is a high-purity analytical reference standard with the molecular formula C7H5NS and a molecular weight of 135.19 g/mol.
Owing to a nitrile group, sulfur-containing functionality, an aromatic ring system, Benzo[d]isothiazole is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 135.19 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), Benzo[d]isothiazole 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 | C7H5NS |
| Molecular Weight | 135.19 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Benzo Standards
- Benzo[b]thiophene-2-d (CAS 63724-94-7)
- Benzo[d]isoxazol-4-ol (CAS 1360931-63-0)
- Benzo[c][1,2,5]oxadiazol-4-amine (CAS 767-63-5)
- Benzo[d]isoxazol-5-ol (CAS 808755-45-5)
- Benzo[d]isoxazol-7-ol (CAS 55559-31-4)
- 1,2-Bis(benzo[d][1,3,2]dioxaborol-2-yloxy)benzene (CAS 37737-62-5)
- Benzo[d][1,3,2]dioxaborol-2-ol (CAS 45770-13-6)
- Benzo[d][1,3]dioxol-2-one (CAS 2171-74-6)
Recommended Standards
- 5-methoxy-1,2,4-thiadiazol-3-amine (CAS 363179-65-1)
- Phenyl thiocyanate (CAS 5285-87-0)
- 4-Mercaptobenzonitrile, 97% (CAS 36801-01-1)
- Thieno[2,3-b]pyridine (CAS 272-23-1)
- 4-Hydroxy-1-methylpiperidine-4-carboxylic acid hydrochloride (CAS 41248-72-0)
- 1-(Bromomethyl)-1-(3,3-dimethylbutoxy)cycloheptane (CAS 1496786-13-0)
- ethyl 7-(methoxymethoxy)-2-oxo-chromene-3-carboxylate (CAS 2584409-85-6)
- tert-Butyl 5-Bromopyridine-2-carboxylate (CAS 845306-08-3)
- 2-Formyl-4-methoxyphenylboronic Acid (CAS 139962-95-1)
- 2-Chloro-4-(1H-imidazol-1-yl)-6-methylpyrimidine (CAS 135052-25-4)
- Letrozole Impurity 32 (CAS 305861-48-7)
- 2-Fluoro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzenesulfonamide (CAS 1310956-30-9)
- Rimegepant Impurity 77 (CAS CATO-C4X-248777)
- MCH-Gene-Overprinted-Polypeptide-14 (rat) (H-4746.0500) (CAS 182917-44-8)
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