61837-20-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 61837-20-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,1,8,3 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 61837-20:
(7*6)+(6*1)+(5*8)+(4*3)+(3*7)+(2*2)+(1*0)=125
125 % 10 = 5
So 61837-20-5 is a valid CAS Registry Number.
61837-20-5Relevant articles and documents
Phenylethynyl substituted aromatic diamines
-
, (2008/06/13)
As new compositions of matter, 2,2'-bis(phenylethynyl)-4,4'-diaminobiphenyl and 2,2'-bis(phenylethynyl)-5,5'-diaminobiphenyl. The compounds are useful as monomers suitable for the preparation of thermally stable polymer systems such as polyimides, polyami