4,4′-[Methylenebis(4,1-phenyleneimino)]bis[4-oxobutanoic acid] CAS 155267-38-2
| CAS No. | 155267-38-2 |
| Molecular Formula | C21H22N2O6 |
| Molecular Weight | 398.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,4′-[Methylenebis(4,1-phenyleneimino)]bis[4-oxobutanoic acid] (CAS 155267-38-2), molecular formula C21H22N2O6 and molecular weight 398.41 g/mol, is a CATO reference standard with documented purity and traceability.
4,4′-[Methylenebis(4,1-phenyleneimino)]bis[4-oxobutanoic acid] (C21H22N2O6) contains a flavonoid core, an amide 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 4,4′-[Methylenebis(4,1-phenyleneimino)]bis[4-oxobutanoic acid] under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H22N2O6 |
| Molecular Weight | 398.41 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
| Nitrogen Atoms | 2 |
Related Methylenebis Standards
- 1,1'-(Methylenebis(4,1-phenylene))bis(3-butylurea) (CAS 77703-56-1)
- 5,5-Methylenebis(4-benzyl-4H-1,2,4-triazole-3-thiol) (CAS 62575-53-5)
- 3,3'-((Methylenebis(oxy))bis(4,1-phenylene))bis(pyrrolidine-2,5-dione) (CAS 87367-86-0)
- 2,2＇-Methylenebis(6-cyclohexyl-p-cresol) (CAS 4066-02-8)
- 2,2′-[Methylenebis(4,1-phenylenenitrilomethylidyne)]bis[phenol] (CAS 4434-23-5)
- 4,4'-Methylenebis(3-bromo-N,N-dimethylaniline) (CAS 63594-70-7)
- 6,6'-Methylenebis(4-chloro-2-isopropyl-5-methylphenol) (CAS 15686-33-6)
- 1216547-21-5 3,3'-{Methylenebis[(4,1-phenylene)hydrazine-2,1-diyl]}di(cyclohex-2-en-1-one) DTXSID80724590 (CAS 1216547-21-5)
Recommended Standards
- (4-Nitrobenzyl)triphenylphosphonium chloride (CAS 1530-42-3)
- 3,3,3',3'-Tetramethyl-5,5'-dinitro-2,2',3,3'-tetrahydro-1,1'-spirobi[indene]-6,6'-diol (CAS 158518-97-9)
- Schisanlignone D (CAS 144606-84-8)
- 3-[1-(3,4-Difluorobenzoyl)piperidin-4-yl]-4-(4-methylphenyl)-4,5-dihydro-1H-1,2,4-triazol-5-one (CAS 1775412-31-1)
- 1-(5-Isopropylthiophen-3-yl)-N-methylmethanamine (CAS 1342471-48-0)
- 2-tert-Butyl-1,2,3,4-tetrahydroacridine-9-carboxylic acid (CAS 351000-76-5)
- CDC9L46LG6 580-19-8 7-Aminoquinoline 7-Quinolinamine (9CI) Quinoline, 7-amino- 5-22-10-00313 (Beilstein Handbook Reference) BRN 0113310 CCRIS 1682 NSC 58389 7-Quinolylamine UNII-CDC9L46LG6 (CAS 580-19-8)
- 1-(5-Hydroxy-1H-pyrrolo[2,3-b]pyridin-1-yl)ethanone (CAS 1082041-98-2)
- 1-Benzhydrylazetidin-3-yl 3,3-diaminoacrylate Acetate (CAS 221906-67-8)
- 3-[5-(Propan-2-yl)-1,3,4-oxadiazol-2-yl]piperidine (CAS 1368952-50-4)
- 6-((4-Bromobenzyl)thio)-9-isobutyl-9H-purin-2-amine (CAS 93313-23-6)
- 5-(2,5-Dimethylphenoxy)furan-2-carbaldehyde (CAS 1291494-07-9)
- 4,8-Dimethyl-2-morpholinoquinoline-6-carbaldehyde (CAS 89446-48-0)
- Semaglutide impurity 80 (CAS CATO-C4X-222680)
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