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.
Just three years after Qin Shi Huang's death in 210 B.C., the Qin dynasty was overthrown. The imperial system that he'd set in motion, however, would remain at work in China until 1912, when the last Emperor abdicated and China became a Republic.ust three years after Qin Shi Huang's death in 210 B.C., the Qin dynasty was overthrown. The imperial system that he'd set in motion, however, would remain at work in China until 1912, when the last Emperor abdicated and China became a Republic.