74307-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74307-18-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,3,0 and 7 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 74307-18:
(7*7)+(6*4)+(5*3)+(4*0)+(3*7)+(2*1)+(1*8)=119
119 % 10 = 9
So 74307-18-9 is a valid CAS Registry Number.
74307-18-9Relevant articles and documents
THE SYNTHESIS OF NAPHTH- AND NAPHTHAZULENES
Yasunami, Masafumi,Yang, P. W.,Kondo, Yukio,Noro, Yukio,Takase, Kahei
, p. 167 - 170 (1980)
Naphth- and naphthazulenes were synthesized by dehydrogenation of 5,6-dihydronaphth- and 5,12 dihydronaphthazulenes which were obtained by the reaction of 2H-cycloheptafuran-2-one with 1- and 2-pyrrolidinyl-3,4-dihydronaphthalenes, respectively.