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526190-09-0

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526190-09-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 526190-09-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,2,6,1,9 and 0 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 526190-09:
(8*5)+(7*2)+(6*6)+(5*1)+(4*9)+(3*0)+(2*0)+(1*9)=140
140 % 10 = 0
So 526190-09-0 is a valid CAS Registry Number.

526190-09-0Relevant articles and documents

Novel method for preparing drotaverine hydrochloride intermediate

-

, (2020/06/16)

The invention discloses a novel method for preparing a drotaverine hydrochloride intermediate, belonging to the technical field of medicine synthesis. The preparation method comprises the following steps: preparing an intermediate 3,4-diethoxyphenylacetic acid with 1,2-diethoxybenzene as a raw material, and preparing the intermediate 3,4-diethoxyphenylacetamide with 3,4-diethoxyphenylacetic acid as a raw material. According to the novel process for preparing the drotaverine hydrochloride intermediate, a method for directly preparing 3,4-diethoxyphenylacetic acid and 3,4-diethoxyphenylethylamine is adopted, and a process for preparing 3,4-diethoxyphenylacetonitrile is avoided, so a reaction step of using sodium cyanide is avoided.

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