42579

4-Phenyl-1,2,4-triazolin-3,5-dion

derivatization grade (HPLC), LiChropur^™, ≥98.0% (CHN)

• Synonym(e): 4-Phenyl-3H-1,2,4-triazol-3,5(4H)-dion, PTAD
• Empirische Formel (Hill-System): C₈H₅N₃O₂
• CAS-Nummer: 4233-33-4
• Molekulargewicht: 175.14
• UNSPSC Code: 41116105
• NACRES: NA.22
• PubChem Substance ID: 329756242
• EC Number: 224-191-7
• Beilstein/REAXYS Number: 141548
• MDL number: MFCD00003148
• Assay: ≥98.0% (CHN)

Eigenschaften

• grade: derivatization grade (HPLC)
• Quality Segment: 100
• assay: ≥98.0% (CHN)
• quality: LiChropur^™
• technique(s): HPLC: suitable
• mp: 165-170 °C (dec.) (lit.)
• storage temp.: 2-8°C
• SMILES string: O=C1N=NC(=O)N1c2ccccc2
• InChI: 1S/C8H5N3O2/c12-7-9-10-8(13)11(7)6-4-2-1-3-5-6/h1-5H
• InChI key: ISULLEUFOQSBGY-UHFFFAOYSA-N

Beschreibung

General description

4-Phenyl-1,2,4-triazoline-3,5-dione, also known as Cookson reagent, is a strong dienophile, which gives a stable Diels-Alder adduct quantitatively within a short time and under mild conditions. It is commonly used as a protecting group of the diene moiety for the synthesis of vitamin D₃ (VD₃)-related compounds.

Application

4-Phenyl-1,2,4-triazoline-3,5-dione may be used as a derivatizing reagent for the determination of trace levels of 25-hydroxyvitamin D and its C-3 epimer in biological samples and cholecalciferol (vitamin D₃) in fortified infant formula, milk and milk powder using liquid chromatography–tandem mass spectrometry (LC–MS/MS)technique.

Other Notes

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Legal Information

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

Sicherheitshinweise

• Lagerklasse: 11 - Combustible Solids
• wgk: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable