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.
The Great Depression: Economic Collapse. In the 1930s, American capitalism practically stopped working. For more than a decade, from 1929 to 1940, America's free-market economy failed to operate at a level that allowed most Americans to attain economic success.n different ways, both Keynesian and Friedmanist explanations for the Great Depression suggest that American capitalism broke down in the 1930s because of a tragic disconnect between the needs of the economy as a whole and the rational economic actions of the individuals struggling to survive within it.