4,4＇-Bis(isocyanatophenyl)oxide CAS 4128-73-8
| CAS No. | 4128-73-8 |
| Molecular Formula | C14H8N2O3 |
| Molecular Weight | 252.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4,4＇-Bis(isocyanatophenyl)oxide (CAS 4128-73-8), molecular formula C14H8N2O3 and molecular weight 252.22 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4,4＇-Bis(isocyanatophenyl)oxide (C14H8N2O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 252.22 g/mol, it falls into the medium-molecular-weight range. 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).
CATO manufactures 4,4＇-Bis(isocyanatophenyl)oxide 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 | C14H8N2O3 |
| Molecular Weight | 252.22 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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.) | 1958 |
| Nitrogen Atoms | 2 |
Related Bis Standards
- 2-(3-isocyanatophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 787591-43-9)
- 2-(4-isocyanatophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 380430-64-8)
- 2-(4-Isocyanatophenyl)-5-(trifluoromethyl)pyridine (CAS 906352-73-6)
- (E)-1-(4-Isocyanatophenyl)-2-phenyldiazene (CAS 321951-62-6)
- 1-(4-Isocyanatophenyl)-4-methylpiperazine (CAS 879896-39-6)
- 4-(3-Isocyanatophenyl)-2-methyl-1,3-thiazole (CAS 852180-41-7)
- 4-(4-Isocyanatophenyl)-2-methyl-1,3-thiazole (CAS 857283-94-4)
- 1-(4-Isocyanatophenyl)-3,5-dimethyl-1H-pyrazole (CAS 937796-04-8)
Recommended Standards
- Pemafibrate Impurity 58 (CAS 2008-01-7)
- Mono(3-carboxypropyl) Phthalate (MCPP) (CAS 66851-46-5)
- Pemafibrate Impurity 34 (CAS CATO-C4X-290334)
- Ethyl 2-amino-2-[(E)-2-(2-nitrophenyl)hydrazono]acetate (CAS 114098-35-0)
- 2-Phenoxy-6-phenyl-4-(trifluoromethyl)nicotinonitrile (CAS 338749-44-3)
- (5-Chloro-2-iodophenyl)(2-fluoro-6-methoxyphenyl)methanone (CAS 1233025-91-6)
- SU 16f (CAS 251356-45-3)
- 2-(aminomethyl)-5-hydroxy-1-methyl-1,4-dihydropyridin-4-one (CAS 73115-07-8)
- N-BENZO(G)QUINOLIN-4-YL-N',N'-DIETHYL-ETHANE-1,2-DIAMINE,2 H3PO4 (CAS 56548-50-6)
- N-(4-Ethoxybenzo[d]thiazol-2-yl)acetamide (CAS 313661-90-4)
- 6-Bromo-4-chloro-1,8-naphthyridine-3-carbonitrile (CAS 1234615-92-9)
- 5-Fluoro-1H-indene-1,3(2H)-dione (CAS 54746-57-5)
- Diethyl (6-Chloro-2-indolylmethyl)formamido-malonate (CAS 1076199-98-8)
- Des-Leu26-Tirzepatide (CAS CATO-CPTD788947)
Why CATO?
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