33972-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33972-81-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,9,7 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 33972-81:
(7*3)+(6*3)+(5*9)+(4*7)+(3*2)+(2*8)+(1*1)=135
135 % 10 = 5
So 33972-81-5 is a valid CAS Registry Number.
InChI:InChI=1/C7H11Cl3O2/c1-2-3-4-5-12-6(11)7(8,9)10/h2-5H2,1H3
33972-81-5Relevant articles and documents
Carboxylic acids supported on silica: A smooth acylating agent for alcohols
Da Graca Nascimento, Maria,Zanotto, Sandra Patricia,Scremin, Marivania,Rezende, Marcos Caroli
, p. 2715 - 2721 (2007/10/03)
An alternative procedure for the esterification of alcohols by short-chain carboxylic acids supported on silica is presented.