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219800-57-4

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219800-57-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219800-57-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,8,0 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 219800-57:
(8*2)+(7*1)+(6*9)+(5*8)+(4*0)+(3*0)+(2*5)+(1*7)=134
134 % 10 = 4
So 219800-57-4 is a valid CAS Registry Number.

219800-57-4Downstream Products

219800-57-4Relevant articles and documents

Facile syntheses of homothia- and homoazacalixarenes

Ito,Nagai,Ohba,Sone

, p. 1121 - 1128 (2000)

Decahomotetrathiacalix[6]arenes were conveniently prepared from the 2:2 cyclization reactions of bis(chloromethyl)phenol-formaldehyde trimers with 1,2-ethanedithiol in high yields. In contrast, the similar reactions of the trimers with 1,3-propanedithiol

Syntheses of chiral calixarene analog incorporating amino acid residues: Molecular recognition for a racemic ammonium ion by the macrocycles

Ito, Kazuaki,Kida, Atsushi,Ohba, Yoshihiro,Sone, Tyo

, p. 1221 - 1222 (2007/10/03)

Chiral calixarene analog incorporating amino acid residues into macrocyclic rings was prepared. The macrocycles form a chiral concave, which is induced by the chiral transmission from the amino acid to the phenol-formaldehyde tetramer unit through the hyd

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