81-52-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81-52-7 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, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81-52:
(4*8)+(3*1)+(2*5)+(1*2)=47
47 % 10 = 7
So 81-52-7 is a valid CAS Registry Number.
InChI:InChI=1/C14H7BrO4/c15-8-5-9(16)10-11(14(8)19)13(18)7-4-2-1-3-6(7)12(10)17/h1-5,16,19H