Fluorescent Brightener 28 CAS 4404-43-7
| CAS No. | 4404-43-7 |
| Molecular Formula | C40H44N12O10S2 |
| Molecular Weight | 916.98 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Fluorescent Brightener 28 (CAS 4404-43-7), molecular formula C40H44N12O10S2 and molecular weight 916.98 g/mol, is a CATO reference standard with documented purity and traceability.
Fluorescent Brightener 28 (C40H44N12O10S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone 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).
As a certified reference material (CRM), Fluorescent Brightener 28 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 | C40H44N12O10S2 |
| Molecular Weight | 916.98 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°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) | 25.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 12 |
| Sulfur Atoms | 2 |
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Recommended Standards
- 1-(2,5-Dimethyl-1H-pyrrol-1-yl)-1-((2,2'',4,4'',6,6''-hexaethyl-[1,1':3',1''-terphenyl]-2'-yl)oxy)-1-(2-methyl-2-phenylpropylidene)-N-(perfluorophenyl)molybdenumimine (CAS 1895884-08-8)
- (2R,3S,5R)-5-(4-Benzamido-5-((2-cyanoethoxy)methyl)-2-oxopyrimidin-1(2H)-yl)-2-((bis(4-methoxyphenyl)(phenyl)methoxy)methyl)tetrahydrofuran-3-yl (2-cyanoethyl) diisopropylphosphoramidite (CAS 188411-06-5)
- 2-phenyl-3,4-dihydropyrimidin-4-one (CAS 33643-94-6)
- Fluticasone Furoate EP Impurity L (CAS CATO-C4X-165029)
- 4-Bromo-2,5-dimethyl-thiophene-3-carbonitrile (CAS 1379362-41-0)
- 5-(3-Fluoro-4-methoxyphenyl)-6-methyl-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 861207-30-9)
- 4-Deoxygadusol (CAS 65318-54-9)
- 2-(2-((1-Phenylethyl)amino)ethoxy)ethan-1-ol (CAS 1042540-42-0)
- (7-Bromoquinolin-3-yl)methanamine (CAS 1196155-30-2)
- Dimethyl[2-(pyrrolidin-3-yloxy)ethyl]amine dihydrochloride (CAS 1394040-74-4)
- Vonoprazan Impurity 211 (CAS CATO-C4X-1020211)
- M-Tolualdehyde (CAS 620-23-5)
- 3-Bromo-4-(4-methylpiperidin-1-yl)benzaldehyde (CAS 1698473-77-6)
- Semaglutide Impurity 144 (CAS 394210-59-4)
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