(4-Nitrothiophen-2-yl)methanol CAS 20898-91-3
| CAS No. | 20898-91-3 |
| Molecular Formula | C5H5NO3S |
| Molecular Weight | 159.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
(4-Nitrothiophen-2-yl)methanol (CAS 20898-91-3), molecular formula C5H5NO3S and molecular weight 159.16 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, (4-Nitrothiophen-2-yl)methanol (C5H5NO3S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 159.16 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), (4-Nitrothiophen-2-yl)methanol 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 | C5H5NO3S |
| Molecular Weight | 159.16 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Nitrothiophen Standards
- 5-Methyl-2-nitrothiophen-3-amine (CAS 1404364-31-3)
- (5-Nitrothiophen-2-yl)methanamine (CAS 90993-47-8)
- 4-Methyl-3-nitrothiophen-2-amine (CAS 80313-10-6)
- 2-(2-Nitrothiophen-3-yl)acetonitrile (CAS 93418-94-1)
- 1-(3-Nitrothiophen-2-yl)ethanone (CAS 65967-45-5)
- 1-(5-Nitrothiophen-3-yl)ethan-1-one (CAS 58157-89-4)
- 2-(5-Nitrothiophen-2-yl)ethan-1-amine (CAS 926256-13-5)
- 2-nitrothiophen-3-ol (CAS 128496-62-8)
Recommended Standards
- 2-Amino-2-(3-fluorobicyclo[1.1.1]Pentan-1-yl)acetic acid (CAS 1934367-59-5)
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- 3-methoxy-1,2-thiazole-5-carboxylic acid (CAS 1909312-82-8)
- (S)-2-Amino-2-(3-fluorobicyclo[1.1.1]pentan-1-yl)acetic acid (CAS 2020350-39-2)
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- 6-chloro-5-[3-(1-oxo-1,4-thiazinan-4-yl)prop-1-ynyl]-1H-pyrimidin-4-one (CAS 2528573-58-0)
- 5-(Chloromethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol (CAS 40775-90-4)
- Vericiguat (CAS 1350653-20-1)
- 2-Methyl-2-(methylsulfonyl)propanoic acid (CAS 25841-43-4)
- 2-(2,3-Dihydro-1,4-benzodioxin-5-yl)acetonitrile (CAS 214894-99-2)
- Glycocholic Acid (CAS 475-31-0)
- 4-(Dimethylamino)-7-methyl-7h-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid hydrochloride (CAS 1432681-71-4)
- Liraglutide-d8 Tritrifluoroacetate (CAS CATO-C4X-199223)
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