Promethazine hydrochloride, a phenothiazine derivative, is chemically designated as (Â±)-10-[2-(Dimethylamino)propyl] phenothiazine monohydrochloride. Promethazine hydrochloride occurs as a white to faint yellow, practically odorless, crystalline powder which slowly oxidizes and turns blue on prolonged exposure to air.
Confidence votes 11. The new Republic of China fell into chaos after 1912 because of the mistakes of Yuan Shikai. In 1912, after Sun Yixian(AKA Sun Yat-Sen) stepped down as president in favor for him, Yuan Shikai tried to foolishly create another dynasty.However, the military didn't back him and opposition divided the nation.ventually, the KMT retreated o the island of Taiwan and the CPC became the People's Republic of China (PRC) in 1949. There was never a peace agreement between both nations so both governments claim to be the legitimate government of all of China.
Why did the Weimar Republic face so many problems 1918 - 1923? There were a number of reasons for the problems that the new Republic had to face.It was a completely new government which had to be established. They had to survive the defeat of the war and the lack of confidence Germans had thus acquired-mainly over the political system.here were a number of reasons for the problems that the new Republic had to face. It was a completely new government which had to be established. They had to survive the defeat of the war and the lack of confidence Germans had thus acquired-mainly over the political system.