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74867-19-9

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74867-19-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74867-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,8,6 and 7 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 74867-19:
(7*7)+(6*4)+(5*8)+(4*6)+(3*7)+(2*1)+(1*9)=169
169 % 10 = 9
So 74867-19-9 is a valid CAS Registry Number.

74867-19-9Downstream Products

74867-19-9Relevant articles and documents

Method for preparing symmetric urea compound

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Paragraph 0038-0043; 0169-0174, (2020/03/25)

The invention provides a novel reaction system for synthesizing a symmetric urea compound by taking CO2 as a carbonylation reagent, wherein Lewis base and hydrosilane are used as accelerators and efficiently enable an aromatic/aliphatic primary amine compound to react with normal-pressure CO2 to generate corresponding symmetric urea compounds containing different functional groups under mild conditions (100 DEG C, diglyme). According to the method, normal-pressure CO2 is used as an environmentally-friendly non-toxic carbonylation reagent, and cheap Lewis base and PMHS (industrial silicon waste) are used as accelerators, so that the use of toxic carbonylation reagents, isocyanate, high-pressure CO2, expensive dehydrating agents and precious metals is avoided, purification and separation ofintermediates are not needed, pure products can be obtained only through simple suction filtration and separation after the reaction is finished, and the method is an efficient and novel synthesis method and has high industrial application value.

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