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177093-57-1

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177093-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 177093-57-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,0,9 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 177093-57:
(8*1)+(7*7)+(6*7)+(5*0)+(4*9)+(3*3)+(2*5)+(1*7)=161
161 % 10 = 1
So 177093-57-1 is a valid CAS Registry Number.

177093-57-1Relevant articles and documents

3-[4-(Bromomethyl)phenyl]-7-(diethylamino)-2H-1-benzopyran-2-one (MPAC-Br): A highly sensitive fluorescent derivatization reagent for carboxylic acids in high-performance liquid chromatography

Takechi, Haruko,Kamada, Seiji,Machida, Minoru

, p. 793 - 799 (2007/10/03)

7-Dimethylaminocoumarin derivatives were synthesized and the characteristics of their absorption and emission spectra were investigated. Among them, 3-aryl-7-dimethylaminocoumarins were shown to be promising candidates as the fluorogenic groups for highly sensitive derivatization reagents. Based on the spectroscopic studies, 3-[4-(bromomethyl)phenyl]-7-(diethylamino)-2H-1-benzopyran-2-one (MPAC-Br) was designed and synthesized as a fluorescent derivatization reagent for carboxylic acids in HPLC. Saturated carboxylic acids (C4-C18) were derivatized almost quantitatively into the corresponding fluorescent MPAC-esters by treatment with MPAC-Br. The MPAC-esters of these acids were clearly separated on a reversed-phase HPLC column (Inertsil ODS-2, mobile phase: methanol-water, excitation wavelength 403 nm; emission wavelength 474 nm). The detection limit (S/N=17) of lauric acid, as a test compound, was 15fmol/10μl.

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