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16644-58-9

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16644-58-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16644-58-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,6,4 and 4 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 16644-58:
(7*1)+(6*6)+(5*6)+(4*4)+(3*4)+(2*5)+(1*8)=119
119 % 10 = 9
So 16644-58-9 is a valid CAS Registry Number.

16644-58-9Relevant articles and documents

PROCESS FOR THE PREPARATION OF N-SUBSTITUTED CARBAMIC ACID ESTER AND PROCESS FOR THE PREPARATION OF ISOCYANATE USING THE N-SUBSTITUTED CARBAMIC ACID ESTER

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Page/Page column 163; 166, (2011/06/10)

The present invention provides a method for producing N-substituted carbamic acid-O-aryl ester derived from a compound having an ureido group, the method comprising the step of carrying out esterification or esterification and transesterification from the compound having the ureido group and a hydroxy composition containing one type or a plurality of types of hydroxy compounds.

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