2-Amino-5-nitrobenzenethiol CAS 23451-98-1
| CAS No. | 23451-98-1 |
| Molecular Formula | C6H6N2O2S |
| Molecular Weight | 170.19 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.
2-Amino-5-nitrobenzenethiol (CAS 23451-98-1), molecular formula C6H6N2O2S and molecular weight 170.19 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 2-Amino-5-nitrobenzenethiol is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 170.19 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).
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 | C6H6N2O2S |
| Molecular Weight | 170.19 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
- 2-Ethoxy-4-hydroxythiazole-5-carbonitrile (CAS 59965-53-6)
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- 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde (CAS 204905-77-1)
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- 4-Methoxy-5-(5-phenyl-4,5-dihydro-1H-pyrazol-3-yl)benzofuran-6-ol (CAS 61340-38-3)
- 3-(3-Nitrophenyl)oxetane-3-carboxylic acid (CAS 1393552-25-4)
- (Butan-2-yl)[(3-phenoxyphenyl)methyl]amine (CAS 854321-28-1)
- Albendazole-2-aminosulfonehydrochloride (CAS CATO-CCAD301388)
- 1-(3-Fluoro-5-methylphenyl)propan-1-amine (CAS 1255306-18-3)
- (4R)-Perillyl Phenyl Sulfoxide (CAS 1391078-39-9)
- Methyl 2-(3-bromopropoxy)benzoate (CAS 26930-28-9)
- 2-(2-methoxy-2-oxoethyl)furan-3-carboxylic acid (CAS 1479004-17-5)
- Acetyl Hexapeptide-38 (CAS 1400634-44-7)
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