136721-71-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136721-71-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,7,2 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 136721-71:
(8*1)+(7*3)+(6*6)+(5*7)+(4*2)+(3*1)+(2*7)+(1*1)=126
126 % 10 = 6
So 136721-71-6 is a valid CAS Registry Number.