3-Chloro-2-methylbut-2-enal CAS 1679-40-9
| CAS No. | 1679-40-9 |
| Molecular Formula | C5H7ClO |
| Molecular Weight | 118.56 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-Chloro-2-methylbut-2-enal.
3-Chloro-2-methylbut-2-enal (CAS 1679-40-9) is a high-purity analytical reference standard with the molecular formula C5H7ClO and a molecular weight of 118.56 g/mol.
Based on its molecular formula C5H7ClO, 3-Chloro-2-methylbut-2-enal contains a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 118.56 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C5H7ClO |
| Molecular Weight | 118.56 g/mol |
| 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 | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
Related Chloro Standards
- 2-Chloro-3-methylcyclopropane-1-carbaldehyde (CAS 139387-00-1)
- 1-Chloro-4-methoxybut-2-yne (CAS 693-27-6)
- 2-Chloro-1-cyclopropylethan-1-one (CAS 7379-14-8)
- 4-Chloro-2-methylbut-2-enal (CAS 3330-25-4)
- 6-Chloro-3,4-dihydro-2H-pyran (CAS 40446-77-3)
- 1-Chloro-3-methylbut-3-en-2-one (CAS 193958-16-6)
- 5-Chloro-4H-1,2,4-triazol-3-amine (CAS 130631-49-1)
- 5-Chloro-1-methyl-1h-1,2,3,4-tetrazole (CAS 67648-50-4)
Recommended Standards
- 1-methylcyclopropane-1-carbonyl chloride (CAS 16480-05-0)
- 3-Pentenoyl chloride (CAS 17066-20-5)
- 3-(Chloromethyl)cyclobutanone (CAS 175021-13-3)
- Methyl-<SUP>13</SUP>C,d<SUB>3</SUB>-sulfonyl chloride (CAS 1216581-01-9)
- 4-(Benzyloxy)-2-bromo-1-methylbenzene (CAS 60710-40-9)
- 3-(2-Aminocyclohexyl)thiazolidine-2,4-dione (CAS 929826-10-8)
- (R)-4-Benzyl-3-butyryloxazolidin-2-one (CAS 143097-11-4)
- 5-(Chloromethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-7-ol (CAS 40775-90-4)
- 2-(4-Chloro-3-fluorophenyl)oxirane (CAS 1340088-22-3)
- 3-(2-Bromophenyl)-1,1,1-trifluoropropan-2-one (CAS 898787-57-0)
- 4-Amino-2-chloroquinazoline (CAS 59870-43-8)
- (4R,5S)-4-(Hydroxymethyl)-5-methyloxazolidin-2-one (CAS 1613588-28-5)
- Formoterol Impurity 75 (CAS CATO-C4X-152575)
- [D-Ser8]-Semaglutide A (CAS CATO-C4X-2226116)
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