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52185-25-8

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52185-25-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52185-25-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,1,8 and 5 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 52185-25:
(7*5)+(6*2)+(5*1)+(4*8)+(3*5)+(2*2)+(1*5)=108
108 % 10 = 8
So 52185-25-8 is a valid CAS Registry Number.

52185-25-8Upstream product

52185-25-8Relevant articles and documents

Preparation of 2-phenylsemicarbazides

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, (2008/06/13)

2-Phenylsemicarbazides are prepared by a multi-step process involving: (a) treating a phenylhydrazine, or salt thereof, with a chloroformate; (b) adding phosgene; (c) treating the resulting product with an amine; and (d) hydrolyzing the resulting acylated semicarbazide. The reaction can proceed through a Δ2 -1,3,4-oxadiazolin-5-one intermediate formed with heating in step (b). Certain of the products are novel compounds.

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