662156-40-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 662156-40-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,2,1,5 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 662156-40:
(8*6)+(7*6)+(6*2)+(5*1)+(4*5)+(3*6)+(2*4)+(1*0)=153
153 % 10 = 3
So 662156-40-3 is a valid CAS Registry Number.