5-Amino-1-phenyl-1H-pyrazol-3-ol CAS 103755-56-2
| CAS No. | 103755-56-2 |
| Molecular Formula | C9H9N3O |
| Molecular Weight | 175.19 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.
5-Amino-1-phenyl-1H-pyrazol-3-ol (CAS 103755-56-2) is a high-purity analytical reference standard with the molecular formula C9H9N3O and a molecular weight of 175.19 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, 5-Amino-1-phenyl-1H-pyrazol-3-ol is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 175.19 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).
As a certified reference material (CRM), 5-Amino-1-phenyl-1H-pyrazol-3-ol 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 | C9H9N3O |
| Molecular Weight | 175.19 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 3 |
Related Amino Standards
- 1-(4-Amino-1H-indazol-1-yl)ethanone (CAS 1010102-10-9)
- 2-Amino-5-cyano-3-methylbenzamide (CAS 1032667-24-5)
- 5-Amino-4-phenyl-2,4-dihydro-3H-pyrazol-3-one (CAS 103755-48-2)
- 2-(3-Amino-1H-pyrazol-5-yl)phenol (CAS 10523-64-5)
- 8-Amino-7-methylquinazolin-4(3H)-one (CAS 1093101-65-5)
- 1-{5-amino-1H-pyrrolo[2,3-b]pyridin-2-yl}ethan-1-one (CAS 1186502-34-0)
- 7-Amino-1h-indole-2-carboxamide (CAS 1193387-65-3)
- 4-Amino-3-cyclopropoxypicolinonitrile (CAS 1243321-18-7)
Recommended Standards
- (1-phenyl-1H-1,2,3-triazol-5-yl)methanol (CAS 103755-51-7)
- 5-(4-Aminophenyl)-2,4-dihydro-3H-pyrazol-3-one (CAS 103755-57-3)
- 8-Methoxyquinoxalin-6-amine (CAS 103755-50-6)
- 4-Hydroxymethyl-1-phenyl-1,2,3-triazole (CAS 103755-58-4)
- (1R,2R)-2-hydroxycyclopentane-1-carboxylic acid (CAS 1443511-34-9)
- 934-30-5 Bicyclo(2.2.1)hept-5-ene-2-carboxylic acid, exo- (9CI) 5-Norbornene-2-carboxylic acid, exo- 4-09-00-00224 (Beilstein Handbook Reference) exo-Bicyclo(2.2.1)hept-5-ene-2-carboxylic acid BRN 3196451 exo-5-Norbornene-2-carboxylic acid NSC 155661 (CAS 934-30-5)
- (1-(o-Tolyl)ethyl)hydrazine (CAS 1016703-75-5)
- 124589-98-6 2-bromo-3-(ethylsulfonyl)-pyridine (CAS 124589-98-6)
- 6-Chloro-4-methyl-3-pyridineboronic Acid (CAS 913836-08-5)
- 6-Cyclopropyl-3-(propan-2-yl)-[1,2]oxazolo[5,4-b]pyridine-4-carboxylic acid (CAS 881443-36-3)
- 3-(4-Fluorophenyl)-1,2,4-oxadiazole-5-carbaldehyde (CAS 944906-08-5)
- 2-([1,1':4',1''-Terphenyl]-4-yl)-5-bromothiophene (CAS 639841-05-7)
- N-(2-bromophenyl)acrylamide (CAS 102804-43-3)
- Acetyl Tetrapeptide-5 (CAS 820959-17-9)
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