139739-77-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139739-77-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,7,3 and 9 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139739-77:
(8*1)+(7*3)+(6*9)+(5*7)+(4*3)+(3*9)+(2*7)+(1*7)=178
178 % 10 = 8
So 139739-77-8 is a valid CAS Registry Number.
139739-77-8Relevant articles and documents
CHLORINATION OF N-ARYLSULFONYL-1,4-AMINONAPHTHOLS AND N-ARYLSULFONYL-1,4-NAPHTHOQUINONE 4-IMINES
Avdeenko, A. P.,Velichko, N. V.,Romanenko, E. A.,Pirozhenko, V. V.
, p. 1535 - 1543 (2007/10/02)
The final products from the chlorination of N-arylsulfonyl-1,4-aminonaphthols and N-arylsulfonyl-1,4-naphthoquinone 4-imines are 4-arylsulfonylimino-1-oxo-2,2,3,3,-tetrachloro-1,2,3,4-tetrahydronaphthalenes.