1309021-83-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1309021-83-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,9,0,2 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1309021-83:
(9*1)+(8*3)+(7*0)+(6*9)+(5*0)+(4*2)+(3*1)+(2*8)+(1*3)=117
117 % 10 = 7
So 1309021-83-7 is a valid CAS Registry Number.