139285-33-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139285-33-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,2,8 and 5 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 139285-33:
(8*1)+(7*3)+(6*9)+(5*2)+(4*8)+(3*5)+(2*3)+(1*3)=149
149 % 10 = 9
So 139285-33-9 is a valid CAS Registry Number.
139285-33-9Relevant academic research and scientific papers
Synthesis of 4-Hydroxy-3-trifluoromethylpyrazoles
Iwata, Satoru,Namekata, Junji,Tanaka, Kiyoshi,Mitsuhashi, Keiryo
, p. 1971 - 1976 (2007/10/02)
Trifluoroacetylaldehyde hydrazones are condensed with glyoxals to give 4-hydroxy-3-trifluoromethylpyrazoles, the reaction offering a novel route to 4-hydroxypyrazoles carrying trifluoromethyl group.The 4-hydroxyl group was easily converted to its derivati
