1639159-76-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1639159-76-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,9,1,5 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1639159-76:
(9*1)+(8*6)+(7*3)+(6*9)+(5*1)+(4*5)+(3*9)+(2*7)+(1*6)=204
204 % 10 = 4
So 1639159-76-4 is a valid CAS Registry Number.