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131991-50-9

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131991-50-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131991-50-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,9,9 and 1 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 131991-50:
(8*1)+(7*3)+(6*1)+(5*9)+(4*9)+(3*1)+(2*5)+(1*0)=129
129 % 10 = 9
So 131991-50-9 is a valid CAS Registry Number.

131991-50-9Relevant articles and documents

Chiral Differentiation in the Deacylation of 6A-O-propanoyl>-β-cyclodextrin

Coates, John H.,Easton, Christopher J.,Eyk, Stephen J. van,May, Bruce L.,Singh, Paramjit,Lincoln, Stephen F.

, p. 759 - 760 (2007/10/02)

In 0.1 mol dm-3 sodium carbonate buffer at pH 11.5 the pseudo first-order rate constants for the hydrolysis of the diastereoisomers of the title compound to give Ibuprofen propanoic acid> and β-cyclodextrin are 2.97*10-5 s-1 and 3.16*10-4 s-1, with the diastereoisomer derived from (R)-Ibuprofen being the most susceptible to hydrolysis.

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