638992-58-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 638992-58-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,8,9,9 and 2 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 638992-58:
(8*6)+(7*3)+(6*8)+(5*9)+(4*9)+(3*2)+(2*5)+(1*8)=222
222 % 10 = 2
So 638992-58-2 is a valid CAS Registry Number.