70203-09-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 70203-09-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,2,0 and 3 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 70203-09:
(7*7)+(6*0)+(5*2)+(4*0)+(3*3)+(2*0)+(1*9)=77
77 % 10 = 7
So 70203-09-7 is a valid CAS Registry Number.