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157229-44-2

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157229-44-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157229-44-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,2,2 and 9 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 157229-44:
(8*1)+(7*5)+(6*7)+(5*2)+(4*2)+(3*9)+(2*4)+(1*4)=142
142 % 10 = 2
So 157229-44-2 is a valid CAS Registry Number.

157229-44-2Relevant articles and documents

Preparation method of o-trifluoromethyl-4-halogenobenzaldehyde and intermediate of o-trifluoromethyl-4-halogenobenzaldehyde

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Paragraph 0049; 0050; 0051; 0052; 0057; 0058; 0061; 0062, (2017/08/25)

The invention discloses a preparation method of o-trifluoromethyl-4-halogenobenzaldehyde and an intermediate of the o-trifluoromethyl-4-halogenobenzaldehyde. The preparation method comprises that under solvent-free conditions, in the presence of an acid a

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