81651-92-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81651-92-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,5 and 1 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 81651-92:
(7*8)+(6*1)+(5*6)+(4*5)+(3*1)+(2*9)+(1*2)=135
135 % 10 = 5
So 81651-92-5 is a valid CAS Registry Number.
81651-92-5Relevant academic research and scientific papers
SYNTHESIS OF POLYCYCLIC AZULENES
Porshnev, Yu. N.,Ivanova, T. N.,Efimova, L. V.,Tereshchenko, E. M.,Cherkashin, M. I.,Dyumaev, K. M.
, p. 132 - 138 (2007/10/02)
With cyclopentadienylsodium 2-methyldiindenopyrylium and 2,10-dimethyl-3,4-dihydronaphthopyrylium perchlorates form 6-methyldiindenoazulene and 4,12-dimethyl-5,6-dihydronaphthoazulene.The reaction of the latter w
