75304-90-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 75304-90-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,3,0 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 75304-90:
(7*7)+(6*5)+(5*3)+(4*0)+(3*4)+(2*9)+(1*0)=124
124 % 10 = 4
So 75304-90-4 is a valid CAS Registry Number.
75304-90-4Relevant articles and documents
Some Reactions on 4H-Cyclopentaphenanthrene-8,9-dione
Yoshida, Masaaki,Kadokura, Atsushi,Minabe, Masahiro,Suzuki, Kazuo
, p. 1179 - 1180 (2007/10/02)
The oxidation of 8,9-dihydro-4H-cyclopentaphenanthrene gave the 4-ketone by treatment with Triton B-oxygen, and afforded 8,9-diketone by the action of chromium (III) salt.The reduction of the quinone yielded the corresponding meso- and dl-diols.