137348-35-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137348-35-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,3,4 and 8 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 137348-35:
(8*1)+(7*3)+(6*7)+(5*3)+(4*4)+(3*8)+(2*3)+(1*5)=137
137 % 10 = 7
So 137348-35-7 is a valid CAS Registry Number.
137348-35-7Relevant articles and documents
NEW SYNTHESIS OF NAPHTHOFURAN DERIVATIVES FROM 1,2-DIHYDROXY-4-NAPHTHYL-β-DICARBONYL COMPOUNDS
Grinev, A. N.,Sorokina, I. K.,Bogdanova, G. A.
, p. 476 - 478 (2007/10/02)
A method for obtaining 4-acetonyl (4-phenacyl) derivatives of 1,2-dioxo- and 1,2-dihydroxynaphthalenes is proposed.The previously unknown naphthofuran o-quinones were synthesized from the latter derivatives.
