689756-56-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 689756-56-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,9,7,5 and 6 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 689756-56:
(8*6)+(7*8)+(6*9)+(5*7)+(4*5)+(3*6)+(2*5)+(1*6)=247
247 % 10 = 7
So 689756-56-7 is a valid CAS Registry Number.