1011991-85-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1011991-85-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,1,9,9 and 1 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1011991-85:
(9*1)+(8*0)+(7*1)+(6*1)+(5*9)+(4*9)+(3*1)+(2*8)+(1*5)=127
127 % 10 = 7
So 1011991-85-7 is a valid CAS Registry Number.