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54809-89-1

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54809-89-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54809-89-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,8,0 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 54809-89:
(7*5)+(6*4)+(5*8)+(4*0)+(3*9)+(2*8)+(1*9)=151
151 % 10 = 1
So 54809-89-1 is a valid CAS Registry Number.

54809-89-1Relevant articles and documents

Cyclization of 4-phenylthiosemicarbazide with phenacylbromide revisited. Formation of 1,3,4-thiadiazines and of isomeric 1,3-thiazoles

Pfeiffer, Wolf-Diethard,Junghans, Dieter,Saghyan, Ashot S.,Langer, Peter

, p. 1063 - 1067 (2014/08/05)

The cyclization of 4-phenylthiosemicarbazide with phenacylbromide, carried out in refluxing ethanol, afforded 1,3,4-thiadiazine 1 as the major product. In contrast to a previous report, 2-phenylimino-4-phenyl-2,3-dihydro-1,3-thiazol-3- amine (2) and not 2

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