Salicylic acid (potassium) CAS 578-36-9
| CAS No. | 578-36-9 |
| Molecular Formula | C7H5KO3 |
| Molecular Weight | 176.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Salicylic acid (potassium) is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Salicylic acid (potassium) (CAS 578-36-9) is a high-purity analytical reference standard with the molecular formula C7H5KO3 and a molecular weight of 176.21 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, Salicylic acid (potassium) is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 176.21 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).
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), Salicylic acid (potassium) 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 | C7H5KO3 |
| Molecular Weight | 176.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Salicylic Standards
- Salicylic Acid Impurity 14 (CAS 607-85-2)
- Salicylic Acid Impurity 26 (CAS 2100-31-4)
- Salicylic Acid EP Impurity B (CAS 636-46-4)
- Salicylic Acid Methyl Ether-d3 (CAS 96739-36-5)
- Salicylic Acid Impurity 5 (CAS 26171-04-0)
- Salicylic Acid Impurity 25 (CAS 303-07-1)
- Salicylic acid-pentyl ester (CAS 2050-08-0)
- Salicylic acid-13C6 (CAS 1189678-81-6)
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