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.
2. Explain why the League of Nations failed to deal successfully with the Japanese invasion of Manchuria in 1931. This is because the league felt threatened by Japan. This was because Japan had a powerful army and navy and the army leaders dictated government policy.ne of the last failures of the League before it collapsed was the invasion of Japan on Manchuria. The invasion got more serious and eventually ended up in Japan resigning from the League. Japan was also a major country in the League that traded with the USA and had a good income for the league.