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128838-18-6

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128838-18-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128838-18-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,8,3 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 128838-18:
(8*1)+(7*2)+(6*8)+(5*8)+(4*3)+(3*8)+(2*1)+(1*8)=156
156 % 10 = 6
So 128838-18-6 is a valid CAS Registry Number.

128838-18-6Downstream Products

128838-18-6Relevant articles and documents

Pentaalkylguanidines as etherification and esterification catalysts

Barcelo, Gerard,Grenouillat, Denis,Senet, Jean-Pierre,Sennyey, Gerard

, p. 1839 - 1848 (2007/10/02)

Several pentaalkylguanidines have been prepared and found to be superior catalysts for the preparation of aryl and aralkyl ethers from carbonates and for the methylation of phenols with dimethylcarbonate.They also act as effective catalysts for esterification of acids with alkyl chloroformates but not for the acetylation of tertiary alcohols with acetic anhydride.

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