1017778-56-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1017778-56-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,1,7,7,7 and 8 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1017778-56:
(9*1)+(8*0)+(7*1)+(6*7)+(5*7)+(4*7)+(3*8)+(2*5)+(1*6)=161
161 % 10 = 1
So 1017778-56-1 is a valid CAS Registry Number.