81-38-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81-38-9 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 8 and 1 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81-38:
(4*8)+(3*1)+(2*3)+(1*8)=49
49 % 10 = 9
So 81-38-9 is a valid CAS Registry Number.
InChI:InChI=1/C19H19NO3/c1-20-6-5-12-8-16-19(23-10-22-16)18-14-9-13(21-2)4-3-11(14)7-15(20)17(12)18/h3-4,8-9,15H,5-7,10H2,1-2H3/t15-/m1/s1