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1250271-02-3

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1250271-02-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1250271-02-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,0,2,7 and 1 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1250271-02:
(9*1)+(8*2)+(7*5)+(6*0)+(5*2)+(4*7)+(3*1)+(2*0)+(1*2)=103
103 % 10 = 3
So 1250271-02-3 is a valid CAS Registry Number.

1250271-02-3Downstream Products

1250271-02-3Relevant articles and documents

METHOD FOR PREPARING D-BIOTIN

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Page/Page column 4-5, (2012/04/10)

An Improved Preparation Method for D-Biotin The invention discloses an improved preparation method for D-Biotin. If the composite method takes the diesteas the raw material, the finial biotin will be generated with impurities. The features of the invention refers to the improved preparation method for D-Biotin includes: firstly, (3aS,4S,6aR)-1,3-ωωω -butyl)-1H-thiaphene[3,4-d]-2,4(1H)-ketone is got after the methane tricarboxylic acid trialkyl ester and (3aR, 8aS, 8bS)-1,3-2-[3,4-d]thiophene [1,2-a]sulfuryl halide have the condensation reaction in the alkaline environment and then D-Biotin can be got after the reaction process of hydrolysis, decarbaxylation and closed loop. The invention succeeds in greatly improving the biotin quality from the original basis and simultaneously avoids the generation of impurities and the occurrence of side reaction.

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