129820-45-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129820-45-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,8,2 and 0 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 129820-45:
(8*1)+(7*2)+(6*9)+(5*8)+(4*2)+(3*0)+(2*4)+(1*5)=137
137 % 10 = 7
So 129820-45-7 is a valid CAS Registry Number.