1217783-40-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1217783-40-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,7,7,8 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1217783-40:
(9*1)+(8*2)+(7*1)+(6*7)+(5*7)+(4*8)+(3*3)+(2*4)+(1*0)=158
158 % 10 = 8
So 1217783-40-8 is a valid CAS Registry Number.