2,3-Difluoro-6-methoxybenzaldehyde CAS 187543-87-9
| CAS No. | 187543-87-9 |
| Molecular Formula | C8H6F2O2 |
| Molecular Weight | 172.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2,3-Difluoro-6-methoxybenzaldehyde (CAS 187543-87-9), molecular formula C8H6F2O2 and molecular weight 172.13 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2,3-Difluoro-6-methoxybenzaldehyde (C8H6F2O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 172.13 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C8H6F2O2 |
| Molecular Weight | 172.13 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2010 |
| Halogen Content | F-containing |
Related Difluoro Standards
- 2,3-Difluoro-5-methylbenzoic acid (CAS 1003709-96-3)
- 2,5-Difluoro-3-methylbenzoic acid (CAS 1003710-01-7)
- 3,5-Difluoro-2-methylbenzoic acid (CAS 1003710-06-2)
- 3,4-Difluoro-5-methylbenzoic acid (CAS 1017778-60-7)
- 3,4-Difluoro-2-methoxybenzaldehyde (CAS 1023023-24-6)
- 3,5-Difluoro-4-methylbenzoic acid (CAS 103877-76-5)
- 2,5-Difluoro-4-methylbenzoic Acid (CAS 103877-80-1)
- 2,2-Difluoro-2-(pyridin-2-yl)acetamide (CAS 1064652-41-0)
Recommended Standards
- Methyl 2,3-difluorobenzoate (CAS 18355-74-3)
- (2,5-Difluorophenyl)urea (CAS 460346-05-8)
- 4,5-Difluoro-2-methylbenzoic Acid (CAS 183237-86-7)
- (2E)-3-{[(1E)-4,4-Difluoro-3-oxo-1-buten-1-yl]amino}acrylonitrile (CAS 627086-04-8)
- 2-Cyclobutylthiazole-4-carbaldehyde (CAS 1509742-83-9)
- 4-Butanoyl-2-methylphenylboronic acid (CAS 2096334-25-5)
- 64409-12-7 4'-Mercaptobiphenyl-4-carbonitrile MFCD22417214 (CAS 64409-12-7)
- 4-Methyl-2-(phenylsulfonyl)-6,7-dihydro-5H-cyclopenta[d]pyrimidine (CAS 339019-62-4)
- Benzenesulfonic acid, 3-(2H-benzotriazol-2-yl)-4-hydroxy-5-(1-methylpropyl)-, sodium salt (1:1) (CAS 92484-48-5)
- 5-Bromo-1-ethyl-4-methyl-1H-imidazole (CAS 1856030-55-1)
- 2-Chloro-N-(2,4-dichloro-5-(2-methoxyethoxy)phenyl)benzamide (CAS 338961-31-2)
- [(E)-({1-[(2-chloro-1,3-thiazol-5-yl)methyl]-1H-indol-3-yl}methylidene)amino]thiourea (CAS 866131-50-2)
- 1-(Hydroxymethyl)cyclopropane-1-carboximidamide hydrochloride (CAS 2845976-56-7)
- Semaglutide impurity 72 (CAS CATO-C4X-222672)
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