cis-4-Hydroxycinnamic Acid CAS 4501-31-9
| CAS No. | 4501-31-9 |
| Molecular Formula | C9H8O3 |
| Molecular Weight | 164.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of cis-4-Hydroxycinnamic Acid 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.
cis-4-Hydroxycinnamic Acid (CAS 4501-31-9), molecular formula C9H8O3 and molecular weight 164.16 g/mol, is a CATO reference standard with documented purity and traceability.
cis-4-Hydroxycinnamic Acid (C9H8O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. 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 | C9H8O3 |
| Molecular Weight | 164.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Related cis Standards
Recommended Standards
- m-Coumaric Acid (CAS 588-30-7)
- Methyl Terephthalaldehydate (CAS 1571-08-0)
- Trans-O-Coumaric Acid (CAS 614-60-8)
- Phenylpyruvic Acid (CAS 156-06-9)
- N-Acetyl-S-(2,2-dichloroethenyl)-L-cysteine-13C,d3 (CAS 1795787-09-5)
- N-Hexylhydrazinecarboxamide (CAS 79353-76-7)
- 2-(Methylamino)-1,2-diphenylethan-1-ol hydrochloride (CAS 6287-71-4)
- 4-(Bromomethyl)-2-chlorooxazole (CAS 706789-08-4)
- (2,4-Dimethylcyclohex-3-en-1-yl)methyl acetate (CAS 67634-26-8)
- 6-Fluoroisoquinolin-3(2H)-one (CAS 51463-15-1)
- Tert-butyl (2S)-2-amino-7-azabicyclo[2.2.1]Heptane-7-carboxylate (CAS 1354973-34-4)
- Finasteride Impurity 51 (CAS CATO-C4X-164551)
- 5-(Methoxymethyl)-2-phenyl-2,4-dihydro-3H-pyrazol-3-one (CAS 442671-21-8)
- Des-Ile27-Tirzepatide (CAS CATO-CPTD788946)
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