4-Bromothiophene-2-carbohydrazide CAS 438219-36-4
| CAS No. | 438219-36-4 |
| Molecular Formula | C5H5BrN2OS |
| Molecular Weight | 221.07 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 221.07 g/mol gives 4-Bromothiophene-2-carbohydrazide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Bromothiophene-2-carbohydrazide (CAS 438219-36-4) is a high-purity analytical reference standard with the molecular formula C5H5BrN2OS and a molecular weight of 221.07 g/mol.
Structurally, 4-Bromothiophene-2-carbohydrazide (C5H5BrN2OS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, bromine substitution. 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 221.07 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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-Bromothiophene-2-carbohydrazide 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 | C5H5BrN2OS |
| Molecular Weight | 221.07 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Bromothiophene Standards
- 3-Bromothiophene-2-carbohydrazide (CAS 1043593-57-2)
- 2-Bromothiophene-3-carbohydrazide (CAS 1043593-59-4)
- 5-Bromothiophene-2-carbohydrazide (CAS 98027-27-1)
- Methyl 2-bromothiophene-3-carboxylate (CAS 76360-43-5)
- Methyl 3-Bromothiophene-2-carboxylate (CAS 26137-08-6)
- Methyl 4-Bromothiophene-2-carboxylate (CAS 62224-16-2)
- Methyl 4-Bromothiophene-3-carboxylate (CAS 78071-37-1)
- Methyl 5-Bromothiophene-3-carboxylate (CAS 88770-19-8)
Recommended Standards
- 4-Bromo-N-methylthiazole-2-carboxamide (CAS 959755-98-7)
- 5-(Bromomethyl)-2-thiophenecarboxylic Acid (CAS 63273-26-7)
- 4-Bromo-5-methoxythiophene-2-carbaldehyde (CAS 77133-21-2)
- 5-(Bromomethyl)thiophene-3-carboxylic acid (CAS 61854-97-5)
- 2-(5-Methyl-1H-pyrazol-3-yl)pyridine (CAS 19959-77-4)
- (2R,3R,4R)-2-(3-((tert-Butyldimethylsilyl)oxy)benzyl)-4-((tetrahydro-2H-pyran-2-yl)oxy)-3-((3S,E)-3-((tetrahydro-2H-pyran-2-yl)oxy)oct-1-en-1-yl)cyclopentanone 0028AC 65423-57-6 C36H58O6Si (CAS 65423-57-6)
- (2R,6S)-2-methyl-6-(trifluoromethyl)morpholine (CAS 1821725-49-8)
- Pyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidin-6-ol (CAS 932233-33-5)
- 6-(Allylamino)pyridazin-3(2H)-one (CAS 88259-81-8)
- Zinc(II) (R,Z)-12-hydroxyoctadec-9-enoate (CAS 13040-19-2)
- rel-N-[(1R,2R)-2-(Dimethylamino)cyclohexyl]-N′-phenylthiourea (CAS 1398733-83-9)
- Methyl (2E)-3-amino-2-[(E)-pyridine-4-carbonyl]prop-2-enoate (CAS 400077-56-7)
- 5-(Piperazin-1-yl)pentan-1-ol dihydrochloride (CAS 7491-91-0)
- Neuropeptide AF (human) (CAS 192387-38-5)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com