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132382-43-5

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132382-43-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 132382-43-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,2,3,8 and 2 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 132382-43:
(8*1)+(7*3)+(6*2)+(5*3)+(4*8)+(3*2)+(2*4)+(1*3)=105
105 % 10 = 5
So 132382-43-5 is a valid CAS Registry Number.

132382-43-5Relevant articles and documents

Preparation method of 5, 6-dimethylbenzimidazole

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, (2021/06/06)

The invention discloses a preparation method of 5, 6-dimethyl benzimidazole. The preparation method comprises the following four steps: preparation of N-(3, 4-dimethyl phenyl) formamide, preparation of N-(4, 5-dimethyl-2-nitrophenyl) formamide, preparation of N-(2-amino-4, 5-dimethyl phenyl) formamide, and preparation of 5, 6-dimethyl benzimidazole. The preparation method has the following beneficial effects: 1, acetylation and deacetylation used in the prior art are avoided, which is in favor of environmental protection; 2, the synthesis steps of the process are shortened, the original five-step reaction is shortened to the present four-step reaction, and the yield is improved; and 3, the purity of the intermediate is high, separation is not needed, the operation is simple, the defects and deficiencies of the preparation method reported in the literature are overcome, and the method has novelty, greater positive progress effect and practical application value.

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