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612802-12-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 612802-12-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,1,2,8,0 and 2 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 612802-12:
117 % 10 = 7
So 612802-12-7 is a valid CAS Registry Number.

612802-12-7Relevant articles and documents

Chemical synthetic method for beta-arbutin


Paragraph 0007; 0012; 0014; 0016, (2019/01/08)

The invention provides a chemical synthetic method for beta-arbutin, which includes: 1) performing a reaction to pentaacetyl-beta-D-glucose with a 70% hydrofluoric acid pyridine solution at 10-30 DEGC to obtain tetraacetyl-alpha-fluoroglucose; 2) performing a reaction to the tetraacetyl-alpha-fluoroglucose with p-hydroxyacetophenone in a mixed solvent under catalysis of tetrabutylammonium bromidewith Ca(OH)2 being an accelerant at 20-30 DEG C to prepare p-acetylphenyl-2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside; 3) performing a reaction to the p-acetylphenyl-2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside with 40% peroxyacetic acid in an organic solvent at 5-20 DEG C to obtain p-acetoxylphenyl-2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside; 4) performing a reaction to the p-acetoxylphenyl-2,3,4,6-tetra-O-acetyl-beta-D-glucopyranoside at 15-25 DEG C in the presence of anhydrous methanol-sodium methoxide to obtain the beta-arbutin. The method is high in yield, low in cost, gentle in conditions and less in emission of waste liquid, waste gas and waste solids, and is suitable for industrial production.

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