159970-77-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 159970-77-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,9,7 and 0 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 159970-77:
(8*1)+(7*5)+(6*9)+(5*9)+(4*7)+(3*0)+(2*7)+(1*7)=191
191 % 10 = 1
So 159970-77-1 is a valid CAS Registry Number.