143389-41-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143389-41-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,3,8 and 9 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 143389-41:
(8*1)+(7*4)+(6*3)+(5*3)+(4*8)+(3*9)+(2*4)+(1*1)=137
137 % 10 = 7
So 143389-41-7 is a valid CAS Registry Number.
143389-41-7Relevant articles and documents
Bromometric assay of secobarbital sodium
Gorlitzer,Boventer
, p. 291 - 295 (2007/10/02)
Secobarbital sodium (1a) and the 1,3-bis-(4-nitrobenzyl)barbituric acid 2 react with KBrO3 and KBr in acetic acid/HCl to yield the bromohydrines 3 and the dibromo compounds 5. Dehydrobromination leads to the pyrano[2,3-d]pyrimidines 7 and 8, re