Chlorthal-Diacid CAS 2136-79-0
| CAS No. | 2136-79-0 |
| Molecular Formula | C8H2Cl4O4 |
| Molecular Weight | 303.91 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 Chlorthal-Diacid.
CATO supplies Chlorthal-Diacid (CAS 2136-79-0), a certified reference material (molecular formula C8H2Cl4O4, MW 303.91 g/mol) for analytical method development and quality control.
Based on its molecular formula C8H2Cl4O4, Chlorthal-Diacid contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 303.91 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 | C8H2Cl4O4 |
| Molecular Weight | 303.91 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
Related Chlorthal Standards
Recommended Standards
- 3,4,5,6-Tetrachlorophthalic acid hydrate(2:1) (CAS 58086-90-1)
- 3,6-Dibromo-4H-chromen-4-one (CAS 115237-39-3)
- 3,4,5,6-Tetrachlorophthalic acid (CAS 632-58-6)
- 3,7-Dibromo-4H-chromen-4-one (CAS 1159978-70-7)
- 1,1,1,3,8,10,10,10-Octachlorodecane (CAS 601523-23-3)
- (E)-[2-(Benzenesulfonyl)-2-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]ethylidene](methoxy)amine (CAS 338758-57-9)
- n-(2,6-Dimethoxybenzyl)butan-1-amine (CAS 1179082-36-0)
- Tert-butyl 8-(2-ethoxy-2-oxoethyl)-3-azabicyclo[3.2.1]Octane-3-carboxylate (CAS 1474018-03-5)
- N-[4-[(Trifluoroacetyl)amino]benzoyl-d4]-L-glutamic Acid Dimethyl Ester (CAS 461426-33-5)
- 3,7-Bis(4-chlorophenyl)-7-methyltetrahydro-5H-imidazo[1,5-b][1,2,4]triazole-2,5(3H)-dithione (CAS 400084-40-4)
- (5-Bromo-3-(trifluoromethyl)pyridin-2-yl)methyl methanesulfonate (CAS 2792169-10-7)
- Dopamine Impurity 19 (CAS 16240-59-8（free base）)
- 2-(2-Bromothiazol-4-yl)acetamide (CAS 500345-13-1)
- [pGlu] Semaglutide (CAS CATO-C4X-2226288)
Why CATO?
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