51981-34-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51981-34-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,9,8 and 1 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 51981-34:
(7*5)+(6*1)+(5*9)+(4*8)+(3*1)+(2*3)+(1*4)=131
131 % 10 = 1
So 51981-34-1 is a valid CAS Registry Number.
InChI:InChI=1/C18H19NO4S/c1-13(24(20,21)22)10-11-19-14(2)23-18-9-8-16(12-17(18)19)15-6-4-3-5-7-15/h3-9,12-13H,10-11H2,1-2H3