309947-85-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 309947-85-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,9,9,4 and 7 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 309947-85:
(8*3)+(7*0)+(6*9)+(5*9)+(4*4)+(3*7)+(2*8)+(1*5)=181
181 % 10 = 1
So 309947-85-1 is a valid CAS Registry Number.