68541-05-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 68541-05-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,5,4 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 68541-05:
(7*6)+(6*8)+(5*5)+(4*4)+(3*1)+(2*0)+(1*5)=139
139 % 10 = 9
So 68541-05-9 is a valid CAS Registry Number.
InChI:InChI=1/C23H21N5O4S/c1-17-22(23(29)28(26-17)20-8-10-21(11-9-20)33(30,31)32)16-18-4-6-19(7-5-18)27(14-2-12-24)15-3-13-25/h4-11,16H,2-3,14-15H2,1H3,(H,30,31,32)/b22-16+