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138688-58-1

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138688-58-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138688-58-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,6,8 and 8 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 138688-58:
(8*1)+(7*3)+(6*8)+(5*6)+(4*8)+(3*8)+(2*5)+(1*8)=181
181 % 10 = 1
So 138688-58-1 is a valid CAS Registry Number.

138688-58-1Downstream Products

138688-58-1Relevant articles and documents

Preparation and Enzyme-based Structure Determination of 2A,6E-Bis(O-disulfonyl)-β-cyclodextrin

Fujita, Kahee,Ishizu, Takashi,Minamiura, Noshi,Yamamoto, Takehiko

, p. 1889 - 1892 (2007/10/02)

2,6-di-O-Disulfonates were prepared by the reaction of 2-O-(mesitylsulfonyl)-β-cyclodextrin with mesitylsulfonyl chloride in pyridine.Each regioisomer was isolated and the 2A,6E-isomer was structurally determined through enzymatic hydrolysis by Taka amylase A and bacterial saccharifying amylase.

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