667881-42-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667881-42-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,8,8 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 667881-42:
(8*6)+(7*6)+(6*7)+(5*8)+(4*8)+(3*1)+(2*4)+(1*2)=217
217 % 10 = 7
So 667881-42-7 is a valid CAS Registry Number.