304675-78-3 Usage
Chemical Properties
OFF-WHITE TO YELLOWISH GRANULAR CRYST. POWDER
Preparation
A solution of 60 gm (0.284) of 2-bromopyridine N-oxide hydrochloride is neutralized with 25% aqueous sodium hydroxide. In a well-ventilated hood, to this solution, heated with stirring on a steam bath, is added dropwise over a 1-hr period a solution of 32 gm (0.57 mole) of sodium hydrogen sulfide in 150 ml of water. After the addition has been com-pleted, heating is continued for 0.5 hr. The reaction mixture is cooled, filtered, and acidified with 6 Ν hydrochloric acid to afford 24 gm (67%), m.p. 65-68°C. Upon recrystallization from aqueous ethanol, the melting point is raised to 68-70°C.
Similar results were obtained when an equivalent quantity of sodium sulfide was substituted for sodium hydrogen sulfide.
Check Digit Verification of cas no
The CAS Registry Mumber 304675-78-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,4,6,7 and 5 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 304675-78:
(8*3)+(7*0)+(6*4)+(5*6)+(4*7)+(3*5)+(2*7)+(1*8)=143
143 % 10 = 3
So 304675-78-3 is a valid CAS Registry Number.
