1688673-09-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1688673-09-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,8,8,6,7 and 3 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1688673-09:
(9*1)+(8*6)+(7*8)+(6*8)+(5*6)+(4*7)+(3*3)+(2*0)+(1*9)=237
237 % 10 = 7
So 1688673-09-7 is a valid CAS Registry Number.