133357-98-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133357-98-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,3,5 and 7 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 133357-98:
(8*1)+(7*3)+(6*3)+(5*3)+(4*5)+(3*7)+(2*9)+(1*8)=129
129 % 10 = 9
So 133357-98-9 is a valid CAS Registry Number.
133357-98-9Relevant academic research and scientific papers
1,4-Di-o-tolyl-2,3-naphthoquinone
Jones, David W.,Pomfret, Alan
, p. 13 - 18 (2007/10/02)
1,4-Di-o-tolyl-2,3-naphthoquinone 1, produced by lead tetraacetate oxidation of 2,3-dihydroxy-1,4-di-o-tolylnaphthalene 2 at -30 deg C, is sufficiently stable to allow purification involving aqueous work-up and low temperature chromatography.It has been c
