Taken from Wikipedia:
This article is about the plant genus. For use as a psychoactive drug, see Cannabis (drug). For other uses, see Cannabis (disambiguation). Cannabis  Common hemp Conservation status  Least Concern (IUCN 3.1) Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Rosids Order: Rosales Family: Cannabaceae Genus: Cannabis L. Species[1] Cannabis sativa L. Cannabis indica Lam. Cannabis ruderalis Janisch Cannabis (/ˈkænəbɪs/) is a genus of flowering plants that includes three different species, Cannabis sativa,[2] Cannabis indica and Cannabis ruderalis.[1] These species are indigenous to Central Asia and the Indian Subcontinent.[3] Cannabis has long been used for hemp fibre, for hemp oils, for medicinal purposes, and as a recreational drug. Industrial hemp products are made from Cannabis plants selected to produce an abundance of fiber. To satisfy the UN Narcotics Convention, some Cannabis strains have been bred to produce minimal levels of tetrahydrocannabinol (THC), the principal psychoactive constituent. Many plants have been selectively bred to produce a maximum of THC (cannabinoids) which is obtained through the dried flowers of Cannabis plants. Various compounds of the plant, including hashish and hash oil, are extracted from the plant.[4] Globally, in 2013, 60,400 kilograms of cannabis were produced legally.[5] In 2013 between 128 and 232 million people are thought to have used cannabis (2.7% to 4.9% of the global population between the ages of 15 and 65).[6]

CBD is an oil extracted from Industrial Hemp plants (stalks and seeds). The plants used are specially bred to contain high concentrations of the naturally occurring Cannabinoid - Cannabidiol (CBD). Strains such as Catatonic and Charlottes Web are two strains that are very high in CBD and very low in THC. It is not psychoactive ie. you absolutely CANNOT get ‘high’ or intoxicated by consuming CBD Hemp Oil or any natural product from Industrial Hemp plants for that matter. Unlike “Medical Marijuana” it does not contain the psychoactive properties of THC. Additionally, it is well known in scientific research that CBD is anti-psychoactive.

Tetrahydrocannabinol (THC), or more precisely known as Delta-9-tetrahydrocannabinol. is the principal psychoactive constituent (or cannabinoid) of cannabis. THC has a very low solubility in water, but good solubility in most organic solvents, specifically lipids and alcohols. THC, CBD, CBN, CBC, CBG and about 80 other molecules make up the phytocannabinoid family.