158778-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 158778-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,7,7 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 158778-81:
(8*1)+(7*5)+(6*8)+(5*7)+(4*7)+(3*8)+(2*8)+(1*1)=195
195 % 10 = 5
So 158778-81-5 is a valid CAS Registry Number.