135128-72-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 135128-72-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,1,2 and 8 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 135128-72:
(8*1)+(7*3)+(6*5)+(5*1)+(4*2)+(3*8)+(2*7)+(1*2)=112
112 % 10 = 2
So 135128-72-2 is a valid CAS Registry Number.
135128-72-2Relevant articles and documents
Synthesis and Reactions of Some New Pyridazinones
Ghani, Essam Abdel
, p. 2032 - 2034 (2007/10/02)
3-(p-Ethoxybenzoyl)acrylic acid (1) reacts with 3-methyl-1-phenyl-2-pyrazolin-5-one to give an addition compound 2.The condensation of 2 with hydrazine hydrate affords 4,5-dihydro-3(2H)-pyridazinone (3a).Reaction of 3a with dimethyl sulfate, diethyl sulfa