691383-54-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 691383-54-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,3,8 and 3 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 691383-54:
(8*6)+(7*9)+(6*1)+(5*3)+(4*8)+(3*3)+(2*5)+(1*4)=187
187 % 10 = 7
So 691383-54-7 is a valid CAS Registry Number.