25664-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 25664-81-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,6 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 25664-81:
(7*2)+(6*5)+(5*6)+(4*6)+(3*4)+(2*8)+(1*1)=127
127 % 10 = 7
So 25664-81-7 is a valid CAS Registry Number.
InChI:InChI=1/C20H22N4O11S3.2Na/c1-12-10-16(17(34-3)11-18(12)36(26,27)9-8-35-38(31,32)33)21-22-19-13(2)23-24(20(19)25)14-4-6-15(7-5-14)37(28,29)30;;/h4-7,10-11,19H,8-9H2,1-3H3,(H,28,29,30)(H,31,32,33);;/q;2*+1/p-2