20057-86-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20057-86-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,0,5 and 7 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 20057-86:
(7*2)+(6*0)+(5*0)+(4*5)+(3*7)+(2*8)+(1*6)=77
77 % 10 = 7
So 20057-86-7 is a valid CAS Registry Number.
20057-86-7Relevant articles and documents
Optimization of the synthesis of symmetric aromatic tri- and tetrasulfides
Zysman-Colman, Eli,Harpp, David N.
, p. 2487 - 2489 (2003)
The reaction of aromatic thiols with sulfur dichloride and sulfur monochloride to form the corresponding aromatic trisulfides, 2a-d, and tetrasulfides, 3a-d, has been optimized with respect to yield and purity. The use of pyridine as an amine base and the
