1,4-Dichlorobutane-2,3-dione CAS 81269-95-6
| CAS No. | 81269-95-6 |
| Molecular Formula | C4H4Cl2O2 |
| Molecular Weight | 154.98 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 1,4-Dichlorobutane-2,3-dione.
1,4-Dichlorobutane-2,3-dione (CAS 81269-95-6), molecular formula C4H4Cl2O2 and molecular weight 154.98 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 1,4-Dichlorobutane-2,3-dione is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 154.98 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C4H4Cl2O2 |
| Molecular Weight | 154.98 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 | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1980 |
| Halogen Content | Cl-containing |
Related Dichlorobutane Standards
- 1,4-Dichlorobutane-2,3-diol (CAS 2419-73-0)
- cis-1,4-Dichlorobutane-2,3-diol (CAS 40227-39-2)
- 1,4-Dichlorobutane-d8 (CAS 83547-96-0)
- 1,3-Dichlorobutane (CAS 1190-22-3)
- 1,1-Dichlorobutane (CAS 541-33-3)
- 2,3-dichlorobutane (CAS 7581-97-7)
- 1,2-Dichlorobutane (CAS 616-21-6)
- 2,2-Dichlorobutane-1,1,4-triyl triacetate (CAS 141942-59-8)
Recommended Standards
- (S)-2,2-dichlorocyclopropane-1-carboxylic acid (CAS 1932435-83-0)
- 2,2-dichlorocyclopropanecarboxylic acid (CAS 5365-14-0)
- (R)-2,2-dichlorocyclopropane-1-carboxylic acid (CAS 1050236-33-3)
- 4-Chloro-3-Oxobutyryl Chloride (CAS 41295-64-1)
- trans-3-fluorocyclopentan-1-amine (CAS 1354425-58-3)
- 6-Bromo-3-cyano-2-formylbenzenesulfonyl chloride (CAS 1806849-87-5)
- 3-Bromo-2-hydroxy-5-isopropylbenzaldehyde (CAS 886504-31-0)
- (2E)-3-(2-Ethoxyphenyl)-1-(4-ethylphenyl)prop-2-en-1-one (CAS 1175989-07-7)
- ((1,3,5-Triazine-2,4,6-triyl)tris(methylazanediyl))trimethanol (CAS 64124-21-6)
- 3,4-dichlorotetrahydrothiophene 1,1-dioxide (CAS 20688-41-9)
- 1-(cyanomethyl)-3-[(ethoxycarbonyl)amino]pyridinium chloride (CAS 1078162-89-6)
- 3-(Cyclopropylmethoxy)cyclobutane-1-carboxylic acid (CAS 1779121-34-4)
- (4-(2-Morpholinoethoxy)phenyl)methanol (CAS 852180-76-8)
- Custom peptides (CAS CATO-CPTD788509)
Why CATO?
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