136997-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136997-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,9,9 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 136997-81:
(8*1)+(7*3)+(6*6)+(5*9)+(4*9)+(3*7)+(2*8)+(1*1)=184
184 % 10 = 4
So 136997-81-4 is a valid CAS Registry Number.