117843-11-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117843-11-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,8,4 and 3 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 117843-11:
(8*1)+(7*1)+(6*7)+(5*8)+(4*4)+(3*3)+(2*1)+(1*1)=125
125 % 10 = 5
So 117843-11-5 is a valid CAS Registry Number.
117843-11-5Relevant articles and documents
NEW SYNTHESIS OF TAPENTADOL-HCl INTERMEDIATES
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, (2017/01/02)
The present invention relates to a process for the synthesis of tapentadol intermediates comprising the following route of synthesis: (I) → (II) → (III) → (IV) → (V).