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94133-60-5

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94133-60-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 94133-60-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,1,3 and 3 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 94133-60:
(7*9)+(6*4)+(5*1)+(4*3)+(3*3)+(2*6)+(1*0)=125
125 % 10 = 5
So 94133-60-5 is a valid CAS Registry Number.

94133-60-5Downstream Products

94133-60-5Relevant articles and documents

Synthetic method of non-steroidal antiinflammatory drug pain killing

-

, (2021/04/17)

The invention discloses a synthesis method of non-steroidal anti-inflammatory drug tolmetin. The methodcomprises the following steps: sequentially preparing a sulfuric acid-containing acetonedicarboxylic acid crude product, 2-(2-acetoxy)-1-methyl-1H-pyrrole-3-formic acid and 2-(2-alkyl acetate)-1-methyl-1H-pyrrole-3-formic acid by taking citric acid or citric acid monohydrate as a raw material; and carrying out decarboxylation, acylation, hydrolysis and acidification to obtain tolmetin. The synthetic method provided by the invention overcomes the defect that the existing tolmetin preparation process depends on N-methylpyrrole, and is a low-cost, low-pollution and high-yield synthetic method of non-steroidal anti-inflammatory drug tolmetin.

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