157223-52-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 157223-52-4 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 3 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 157223-52:
(8*1)+(7*5)+(6*7)+(5*2)+(4*2)+(3*3)+(2*5)+(1*2)=124
124 % 10 = 4
So 157223-52-4 is a valid CAS Registry Number.
157223-52-4Relevant articles and documents
Synthetic process of DCPTA
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Paragraph 0027; 0028; 0029; 0036, (2017/02/17)
The invention discloses a synthetic process of DCPTA [2-(3,4-dichlorophenoxy)trithylamine] and belongs to the technical field of fine chemicals. The process comprises the following steps: A, 3,4-Dichlorophenol and alkali metal hydroxide are dissolved into