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173326-85-7

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173326-85-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173326-85-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,3,2 and 6 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 173326-85:
(8*1)+(7*7)+(6*3)+(5*3)+(4*2)+(3*6)+(2*8)+(1*5)=137
137 % 10 = 7
So 173326-85-7 is a valid CAS Registry Number.

173326-85-7Downstream Products

173326-85-7Relevant articles and documents

STEREOSPECIFIC SYNTHESIS PROCESS FOR TRETINOIN COMPOUNDS

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Paragraph 0047; 0048, (2014/04/03)

A stereospecific synthesis process for tretinoin compounds comprises the following steps: using substituted triphenyl phosphine salt and β-formyl crotonic acid as raw material to carry out WITTIG reaction under the action of alkali; then adjusting the pH of the reaction liquid to 5-10; adding palladium compound or rhodium compound to carry out isomerization directly and obtain tretinoin compounds with desired configuration. The product yield of the process is high and the intermediate product in the reaction dose not need to be separated. The process is easy to operate and can save the production cost and as well is suitable for industrial production.

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