butynedioic acid CAS 142-45-0
| CAS No. | 142-45-0 |
| Molecular Formula | C4H2O4 |
| Molecular Weight | 114.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a carbohydrate-derived structure, butynedioic acid is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 114.06 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
butynedioic acid (CAS 142-45-0), molecular formula C4H2O4 and molecular weight 114.06 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), butynedioic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C4H2O4 |
| Molecular Weight | 114.06 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
Related butynedioic Standards
- 2-Butynedioic acid, diethyl ester 762-21-0 Acetylenedicarboxylic acid, diethyl ester Bis-(Ethoxycarbonyl)acetylene Di-Ethyl acetylenedicarboxylate Diethyl acetylene dicarboxylate Diethyl acetylenedicarboxylate NSC-67975 NSC67975 WLN: 2OV1UU1VO2 (CAS 762-21-0)
- 2-Butynedioic acid di-tert-butyl ester 66086-33-7 Di-tert-butyl 2-butynedioate Di-tert-butyl acetylenedicarboxylate (CAS 66086-33-7)
- 2-Butynedioic acid monopotassium salt 928-04-1 Acetylenedicarboxylic acid monopotassium salt acetylenedicarboxylic monopotassium acetylenedicarboxylate monopotassium butynedioate monopotassiumsaltofacetylenedicarboxylicacid potassium acetylene dicarboxylate potassium hydrogen acetylenedicarboxylate timtec-bb sbb008993 u-4783 (CAS 928-04-1)
Recommended Standards
- 5-Oxo-4,5-dihydro-1,3,4-oxadiazole-2-carbaldehyde (CAS 1357567-93-1)
- 4-Nitrooxazole (CAS 170696-63-6)
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- 1,2,4-Oxadiazole-3-carboxylic Acid (CAS 856787-15-0)
- 4-Methyl-2-((tetrahydro-2h-thiopyran-3-yl)amino)pentan-1-ol (CAS 1343171-53-8)
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- 6-Fluorothiazolo[5,4-b]pyridin-2-amine (CAS 1440427-89-3)
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- Tirzepatide Impurity 49 (CAS CATO-C4X-324049)
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