22019-73-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22019-73-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,0,1 and 9 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 22019-73:
(7*2)+(6*2)+(5*0)+(4*1)+(3*9)+(2*7)+(1*3)=74
74 % 10 = 4
So 22019-73-4 is a valid CAS Registry Number.
22019-73-4Relevant articles and documents
Synthesis of 1,3,6,8-tetrabromophenanthrene via a stoichiometric Ullmann reaction
Farrar,Sienkowska,Kaszynski
, p. 4039 - 4045 (2000)
1,3,6,8-Tetrabromophenantherene (1) is prepared in four steps from 2,4,6-tribromobenzoic acid (4) in an overall yield of 12%. The key transformation used in the synthesis is a stoichiomteric Ullmann reaction.
