72771-52-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72771-52-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,7,7 and 1 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 72771-52:
(7*7)+(6*2)+(5*7)+(4*7)+(3*1)+(2*5)+(1*2)=139
139 % 10 = 9
So 72771-52-9 is a valid CAS Registry Number.
72771-52-9Relevant articles and documents
Synthesis of Benzodithiophene and its 4,8-Dimethoxy and 4,8-Dimethyl Derivatives
Beimling, Peter,Kossmehl, Gerhard
, p. 3198 - 3203 (2007/10/02)
Eine einfache Synthese fuer Benzodithiophen (4) und die Synthese seines bisher unbekannten 4,8-Dimethoxy- (7) and 4,8-Dimethylderivates (13) wird beschrieben.IR-, 1H NMR-, UV- und MS-Daten werden mitgeteilt.