7-Amino-naphthalene-1,3,6-trisulfonic acid, 97% CAS 118-03-6
| CAS No. | 118-03-6 |
| Molecular Formula | C10H9NO9S3 |
| Molecular Weight | 383.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
7-Amino-naphthalene-1,3,6-trisulfonic acid, 97% (CAS 118-03-6) is a high-purity analytical reference standard with the molecular formula C10H9NO9S3 and a molecular weight of 383.37 g/mol.
Based on its molecular formula C10H9NO9S3, 7-Amino-naphthalene-1,3,6-trisulfonic acid, 97% contains a carbohydrate-derived structure, an amide group, a sulfone group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 383.37 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 7-Amino-naphthalene-1,3,6-trisulfonic acid, 97% 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 | C10H9NO9S3 |
| Molecular Weight | 383.37 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 3 |
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Recommended Standards
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- Aurantiamide benzoate (CAS 150881-02-0)
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- 5-Chloro-6-nitrobenzo[c][1,2,5]thiadiazole (CAS 2207-33-2)
- 4-(((Benzyloxy)carbonyl)amino)cyclohexane-1-carboxylic acid (CAS 220851-34-3)
- Diaquabis(2-thiophenecarboxylato-O2,S1)-Copper (CAS 157385-08-5)
- 1,2,3,5-Tetramethyl-4-propylcyclopenta-1,3-diene (CAS 64417-12-5)
- Etrasimod Impurity 33 (CAS 131373-89-2)
- 3-(2,4-Dioxo-3-azabicyclo[3.1.0]hexan-3-yl)-2-(methylamino)propanamide (CAS 1339169-67-3)
- 4-Amino-N,1-dimethyl-5-imidazolecarboxamide (CAS 858221-03-1)
- Semaglutide Impurity 125 xTFA Salt (CAS CATO-C4X-2226125)
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