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51957-78-9

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51957-78-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51957-78-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,9,5 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 51957-78:
(7*5)+(6*1)+(5*9)+(4*5)+(3*7)+(2*7)+(1*8)=149
149 % 10 = 9
So 51957-78-9 is a valid CAS Registry Number.

51957-78-9Downstream Products

51957-78-9Relevant articles and documents

Microwaves assisted Gabriel synthesis of phthalides

Lacova, Margita,Chovancova, Jarmila,Veverkova, Eva,Toma, Stefan

, p. 14995 - 15006 (2007/10/03)

Cesium acetate was found to be the best catalyst for the synthesis of 3-benzylidephthalide from phthalic anhydride and phenylacetic acid. Reasonable to good yields of different 3-arylmethylenephthalides were isolated from the microwave. Gabriel synthesis, even when phenylthio- and 2-(3-)thienyl- acetic acids were used as the starting material.

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