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77961-19-4

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77961-19-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77961-19-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,9,6 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 77961-19:
(7*7)+(6*7)+(5*9)+(4*6)+(3*1)+(2*1)+(1*9)=174
174 % 10 = 4
So 77961-19-4 is a valid CAS Registry Number.

77961-19-4Downstream Products

77961-19-4Relevant articles and documents

Bromination with N-Bromosuccinimide: Part IV - Some Unusual Observations with α-Lapachone and Dehydro-α-lapachone

Kapoor, N. K.,Gupta, R. B.,Khanna, R. N.

, p. 1078 - 1079 (2007/10/02)

Bromination of α-lapachone (I) with 2 mol N-bromosuccinimide yields 3,4-dibromodehydro-α-lapachone (III), dehydro-α-lapachone (II) and 4-hydroxy-α-lapachone (IV).Dehydro-α-lapachone (II) on bromination with N-bromosuccinimide yields III and β,β-di-(bromomethyl)pyrano-1,4-naphthoquinone (VI).The formation of III and VI in the above reactions seems unusual.

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