4-(Methylamino)phenol sulfate CAS 51-72-9
| CAS No. | 51-72-9 |
| Molecular Formula | C7H9NO |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 221.23 g/mol gives 4-(Methylamino)phenol sulfate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-(Methylamino)phenol sulfate (CAS 51-72-9), molecular formula C7H9NOH2O4S and molecular weight 221.23 g/mol, is a CATO reference standard with documented purity and traceability.
4-(Methylamino)phenol sulfate (C7H9NOH2O4S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C7H9NO H2O4S |
| Molecular Weight | 221.23 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Methylamino Standards
- 4-(Methylamino)phenyl furan-2-carboxylate (CAS 100063-33-0)
- 2-(methylamino)-6,7-dihydro-3H-purin-6-one (CAS 10030-78-1)
- 6-(Methylamino)pyridine-3-boronic Acid Pinacol Ester (CAS 1005009-98-2)
- 2-(Methylamino)cyclopentan-1-ol (CAS 100524-01-4)
- 2-(Methylamino)ethane-1-thiol (CAS 10061-40-2)
- 1-(2-(Methylamino)-2-oxoethyl)-1H-pyrazole-3-carboxylic acid (CAS 1006463-30-4)
- Ethyl 4-((methylamino)methyl)benzoate hydrochloride (CAS 1007870-76-9)
- 2-methyl-2-(methylamino)-1-phenyl-propan-1-ol (CAS 10079-55-7)
Recommended Standards
- 2-[(4-methoxyphenyl)methyl]pyrazolo[4,3-b]pyridine (CAS 2245763-42-0)
- Fmoc-D-Arg(Tos)-OH (CAS 139090-50-9)
- (3,5-Diisobutyl-1H,3H,5H-oxazolo[3,4-c]oxazol-7a(7H)-yl)methanol (CAS 956763-68-1)
- 4-Hydroxy Mestranol (CAS 65694-22-6)
- Silver(II) Pyridine-2-carboxylate (CAS 14783-00-7)
- Cyclohexaneacetic acid, .alpha.-methyl-, ethyl ester (CAS 2511-00-4)
- 6-Morpholinonicotinimidamide (CAS 1016872-90-4)
- 2-Amino-4-(4-methoxyphenyl)thiophene-3-carboxamide (CAS 893645-26-6)
- 5'-[4-(Hydroxymethyl)phenyl][1,1':3',1''-terphenyl]-4,4''-dimethanol (CAS 353289-47-1)
- Fas C- Terminal Tripeptide (CAS 189109-90-8)
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