CI

CI or Ci, but not C I or C.I, may refer to:

Business

Criminology and military

Education

Locations and continental services

Cai (surname)

Cài (Chinese: 蔡) is a Chinese surname that derives from the name of the ancient Cai state. It is regionally more common in China's Fujian Province and in countries settled by ethnic Chinese from that province than in China as a whole. The surname is the 34th most common surname in China, but the 9th most common in Taiwan, where it is usually romanized as Tsai, and the 8th most common in Singapore, where it is usually romanized as Chua. It is also a common name in Hong Kong where it is romanized as Choy, Choi or Tsoi, in Macao and Malaysia, it's spelled as Choi, in Malaysia and the Philippines as Chua, in Thailand as Chuo (ฉั่ว). Moreover, it is also romanized in Cambodia as either Chhay, Chhuor or Chhor among Chinese Cambodians.

History

The Cais are said to be the descendants of the 5th son of King Wen of Zhou, Ji Du. Ji Du was awarded the title of marquis (hóu) of the State of Cai (centered on what is now Shangcai, Zhumadian, Henan, China), and he was known as Cai Shu Du ("Uncle Du of Cai"). Together with Guan Shu and Huo Shu, they were known as the Three Guards. When King Wu died, his son King Cheng was too young and his uncle, the Duke of Zhou, became regent. Seeing that the power of the Duke of Zhou was increasing, the Three Guards got jealous and rebelled against Zhou together with Wu Geng. The Duke of Zhou suppressed the rebellion, and Cai Shu was exiled. King Cheng reestablished Cai Shu’s son Wu or Hu as the new Duke of Cai. Some 600 years later in the Warring States period, the State of Chu conquered Cai in 447 BC and was itself conquered by the Qin state which, in turn, formed the Qin Empire, China's first empire. With the spread of family names to all social classes in the new empire, many people of the former state of Cai began to bear it as a surname.

2C-I

2C-I (2,5-dimethoxy-4-iodophenethylamine is a psychedelic phenethylamine of the 2C family. It was first synthesized by Alexander Shulgin and described in his 1991 book PiHKAL: A Chemical Love Story. The drug is used recreationally for its psychedelic and entactogenic effects and is sometimes confused for the analog 25I-NBOMe, nicknamed "Smiles," in the media.

Recreational use

In the early 2000s, 2C-I was sold in Dutch smart shops after the drug 2C-B was banned.

According to the US government's Drug Enforcement Administration, 2C-I is taken orally or snorted in a powder form.

Effects

Visual effects of 2C-I exposure have been described by many users as iterating fractals, along with a more generalized shift in perception and/or cognition.

Drug prohibition laws

European Union

In December 2003, the European Council issued a binding order compelling all EU member states to ban 2C-I within three months.

Denmark

Controlled substance.

Germany

Controlled substance.

Greece

Controlled substance.

Ireland