139519-85-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139519-85-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,5,1 and 9 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 139519-85:
(8*1)+(7*3)+(6*9)+(5*5)+(4*1)+(3*9)+(2*8)+(1*5)=160
160 % 10 = 0
So 139519-85-0 is a valid CAS Registry Number.
139519-85-0Relevant articles and documents
Pyrroles from etacrynic acid
Gorlitzer,Bomeke
, p. 13 - 15 (2007/10/02)
The 1,4-dicarbonyl and 1,4,7-tricarbonyl compounds 1 cyclize with ammonia or methylamine to yield the pyrroles 2. Dependent on the temp. the 1,4-diketone 1b reacts with hydrazine in ethanole to form the pyridazine 3 or the N-amino-pyrrole 4, respectively.