189025-22-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189025-22-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,0,2 and 5 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 189025-22:
(8*1)+(7*8)+(6*9)+(5*0)+(4*2)+(3*5)+(2*2)+(1*2)=147
147 % 10 = 7
So 189025-22-7 is a valid CAS Registry Number.
189025-22-7Relevant articles and documents
Synthesis and Properties of Sulfo-Containing Diamines
Gitis,Gitis,Grudtsin,Subbotin,Fedotov,Alifanova
, p. 1513 - 1515 (2007/10/03)
Polynuclear diamines containing a sulfo group, with heteroatomic bridges between aromatic nuclei are synthesized. The pKa values of amino groups estimated by means of 1H NMR spectroscopy indicate their high enough reactivity in the process of polycondensation.
