42990-64-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42990-64-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,9 and 0 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 42990-64:
(7*4)+(6*2)+(5*9)+(4*9)+(3*0)+(2*6)+(1*4)=137
137 % 10 = 7
So 42990-64-7 is a valid CAS Registry Number.