220004-16-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220004-16-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,0,0 and 4 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 220004-16:
(8*2)+(7*2)+(6*0)+(5*0)+(4*0)+(3*4)+(2*1)+(1*6)=50
50 % 10 = 0
So 220004-16-0 is a valid CAS Registry Number.
220004-16-0Relevant articles and documents
Process for the preparation of 2,2,3,3-tetrafluoro-1,4-benzodioxanes, novel o-(2-bromo-1,1,2,2-tetrafluoroethoxy)-phenols, and novel 2-bromo-1,1,2,2-tetrafluoroethoxy-containing phenyl ethers
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, (2008/06/13)
The present invention is drawn to a process for preparing a 2,2,3,3-tetrafluoro-1,4-benzodioxane, by cyclocondensing a o-(2-bromo-tetrafluoroethoxy)-phenol in the presence of an acid binder.
