156443-34-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156443-34-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,4,4 and 3 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 156443-34:
(8*1)+(7*5)+(6*6)+(5*4)+(4*4)+(3*3)+(2*3)+(1*4)=134
134 % 10 = 4
So 156443-34-4 is a valid CAS Registry Number.