6437-90-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6437-90-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,3 and 7 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 6437-90:
(6*6)+(5*4)+(4*3)+(3*7)+(2*9)+(1*0)=107
107 % 10 = 7
So 6437-90-7 is a valid CAS Registry Number.