4-Aminobenzaldehyde CAS 556-18-3
| CAS No. | 556-18-3 |
| Molecular Formula | C7H7NO |
| Molecular Weight | 121.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 121.14 g/mol gives 4-Aminobenzaldehyde distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Aminobenzaldehyde (CAS 556-18-3), molecular formula C7H7NO and molecular weight 121.14 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a hydroxyl group, an ether linkage, an aromatic ring system, 4-Aminobenzaldehyde is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 121.14 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C7H7NO |
| Molecular Weight | 121.14 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Aminobenzaldehyde Standards
- p-Aminobenzaldehyde polymer (CAS 28107-09-7)
- (E)-2-aminobenzaldehyde O-methyl oxime (CAS 305811-22-7)
- p-Aminobenzaldehyde thiosemicarbazone (CAS 6957-91-1)
- 2-Aminobenzaldehyde hydrate (CAS 2044704-76-7)
- 2-Aminobenzaldehyde hydrochloride (CAS 51723-15-0)
- 3-Aminobenzaldehyde HCI (CAS 127248-99-1)
- m-Aminobenzaldehyde polymer (CAS 29159-23-7)
Recommended Standards
- 4-Amino-1-methyl-1H-pyrrole-2-carbonitrile (CAS 99420-67-4)
- 4-Aminocyclohepta-2,4,6-trienone (CAS 27571-18-2)
- 4,6-Dihydro-cyclopenta[b]pyrrol-5(1H)-one (CAS 313663-81-9)
- 4-Ethynyl-1-methyl-1H-pyrazol-3-amine (CAS 2168087-35-0)
- (2-[(3-chlorophenyl)amino]ethyl)(methyl)amine (CAS 91367-25-8)
- BW 246C (CAS 65705-83-1)
- 2,2-Diethylbutanoyl chloride (CAS 35354-15-5)
- 5-Methoxy-2-methyl-1-benzofuran-3-carboxylic acid (CAS 29735-88-4)
- (1R)-1-Cyclobutylethan-1-amine hydrochloride (CAS 677743-79-2)
- (2E)-3-(2,4-Dimethoxyphenyl)-1-(3-methoxyphenyl)prop-2-en-1-one (CAS 219298-57-4)
- 2,5-Furandione, polymer with 1,3-butadiene (CAS 25655-35-0)
- t-Butyl 4-(3-bromo-2-cyanophenyl)piperazine-1-carboxylate (CAS 1260898-57-4)
- 1-(2,5-Dihydroxyphenyl)-3-phenylprop-2-en-1-one (CAS 19312-13-1)
- [Tyr15] Fibrinopeptide B, human (CAS 125455-56-3)
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