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4-Methylumbelliferone-13C4

Cat no: 161509


Supplier: United States Biological
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Isotope labelled 4-Methylumbelliferone (M333002), the standard for the fluorometric determination of enzyme activity. Highly fluorescent in alkaline solution. Fluorescence: max Abs. l = 360nm, max. Em. l = 449nm; pH > 9 Melting Point: 190-192 degrees C Solubility: Methanol Stability: Light Sensitive - Protect from Light Storage and Stability: May be stored at RT for short-term only. Long-term storage is recommended at -20 degrees C. For maximum recovery of product, centrifuge the original vial prior to removing the cap.
Catalogue number: 161509
Size: 2.5mg
Form: Supplied as a Off-White to Yellow Solid
Alternative names: 7-Hydroxy-4-methylcoumarin; 7-Hydroxy-4-methyl-2H-1-benzopyran-2-one-13C4 ; 7-Hydroxy-4-methyl-coumarin; 7-Hydroxy-4-methyl-2-chromenone-13C4 ; 7-Hydroxy-4-methyl-2-oxo-3-chromene; 7-Hydroxy-4-methyl-2H-1-benzopyran-2-one-13C4 ; NSC 19026; NSC 9408; Omega 127-13C4 ; Pilot 447-13C4 ; b-Methylumbelliferone-13C4
References: Clin. Chim. Acta., 39, 49 (1972); Anal. Biochem., 54, 40 (1973); J. Biochem. Biophys. Methods 19, 207 (1989).

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