2-Methylene-pentanedioic acid CAS 3621-79-2
| CAS No. | 3621-79-2 |
| Molecular Formula | C6H8O4 |
| Molecular Weight | 144.13 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 2-Methylene-pentanedioic acid.
2-Methylene-pentanedioic acid (CAS 3621-79-2) is a high-purity analytical reference standard with the molecular formula C6H8O4 and a molecular weight of 144.13 g/mol.
2-Methylene-pentanedioic acid (C6H8O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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.
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 | C6H8O4 |
| Molecular Weight | 144.13 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1958 |
Related Methylene Standards
- 1-Methylene-1,2,3,4-tetrahydronaphthalene (CAS 25108-63-8)
- 1-Methylene-1,2-dihydroisoquinoline (CAS 74477-04-6)
- 3-Methylene-2,3-dihydroisoquinoline (CAS 74488-22-5)
- 8-Methylene-5,6,7,8-tetrahydroquinoline (CAS 91900-43-5)
- 3-Methylene-cyclopropane-1,2-dicarboxylic acid (CAS 45786-15-0)
- 3-Methylene-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one (CAS 2169176-50-3)
- 1-Methyl-5-methylene-4,5-dihydrocyclopenta[b]pyrrol-6(1H)-one (CAS 143159-33-5)
- 4-Methylene-3,4-dihydro-2H-pyrano[3,2-b]pyridine (CAS 405174-46-1)
Recommended Standards
- 2-Methyl-5-oxotetrahydrofuran-2-carboxylic acid (CAS 57651-41-9)
- 2-Oxo-1,2-dihydropyrimidine-4-carboxylic Acid (CAS 89379-73-7)
- 2-Isocyanatobenzonitrile (CAS 42066-86-4)
- 2-Oxohexahydropyrimidine-4-carboxylic acid (CAS 85701-35-5)
- 1-(4-Biphenylyl)piperazine (CAS 180698-19-5)
- 4-((5-Bromo-2-hydroxybenzylidene)amino)-3-(3-ethoxyphenyl)-1H-1,2,4-triazole-5(4H)-thione (CAS 613249-59-5)
- 3-Cyano-6-nitroindazole, 97% (CAS 858661-74-2)
- 3-Chloro-4-(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)phenol (CAS 1479007-22-1)
- (3-Amino-phenyl)-cyclopropyl-methanone (CAS 162174-75-6)
- 3-Methoxycyclopentene (CAS 39819-74-4)
- 2-(2-Cyano-3-fluorophenyl)-6-fluorobenzonitrile (CAS 1400644-44-1)
- 5-(2-Fluorophenoxymethyl)-4-(1-methoxypropan-2-yl)-4H-1,2,4-triazole-3-thiol (CAS 522624-44-8)
- N1-(2-Chlorobenzyl)cyclohexane-1,4-diamine hydrochloride (CAS 1353985-18-8)
- Pancreatic Polypeptide (human) trifluoroacetate salt (CAS 75976-10-2)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com