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1138457-31-4

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1138457-31-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1138457-31-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,3,8,4,5 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1138457-31:
(9*1)+(8*1)+(7*3)+(6*8)+(5*4)+(4*5)+(3*7)+(2*3)+(1*1)=154
154 % 10 = 4
So 1138457-31-4 is a valid CAS Registry Number.

1138457-31-4Relevant academic research and scientific papers

Unsaturated hyaluronate tetrasaccharide and preparation method thereof

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, (2019/10/01)

The invention relates to unsaturated hyaluronate tetrasaccharide and a preparation method of unsaturated hyaluronate tetrasaccharide. Unsaturated hyaluronate tetrasaccharide is an ionic compound; a negative ion structure general formula of unsaturated hyaluronate tetrasaccharide is shown as formula (1) as shown in the specification; and X is hydrogen or methyl. Sites 4 and 5 of terminal glucuronicacid are set as unsaturated double bonds, so that unsaturated hyaluronate tetrasaccharide has as strong water absorptivity as common hyaluronic acid and stronger oxidation resistance.

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