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557787-79-8

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557787-79-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 557787-79-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,7,8 and 7 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 557787-79:
(8*5)+(7*5)+(6*7)+(5*7)+(4*8)+(3*7)+(2*7)+(1*9)=228
228 % 10 = 8
So 557787-79-8 is a valid CAS Registry Number.

557787-79-8Relevant articles and documents

Enantioselective cation-exchange materials

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Page/Page column 22, (2010/11/08)

The present invention relates to an enantioselective cation-exchange material, comprising a chiral selector (1), composed of a chiral component (2) and at least one cation-exchange group (X), a spacer (3) and a carrier (4). The cation-exchange material is characterized in that the chiral component (2) has a molecular weight of less than 1,000 and the at least one cation-exchange group (X) is an acid group having a pKa4.0.

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