While it is highly unlikely a person will be exposed to Ricin
accidentally, a partially purified form of the substance can be made into "a terrorist or warfare agent."
He stressed that authorities were still waiting for confirmation that the packages contained ricin
. Pentagon police referred the matter to the FBI for investigation.
Initial tests were positive for Ricin
but the FBI is now analysing it further to make final determinations.
RiVax is a ricin
toxin vaccine, under development by Soligenix, and originally invented at the University of Texas Southwestern.
Investigators seized 3,150 grains of ricin
-- all ordered via the Internet -- during a search of the suspect's home in Cologne in June, along with 84.3 mg of prepared ricin
In 1978, ricin
was used in the assassination of the Bulgarian dissident and journalist Georgi Markov.
In his defence, Ali insisted there was "no harmful purpose" behind what he claimed was just an experiment to see if he could get his hands on ricin
The judge commended law enforcement agencies in Britain and the United States for ensuring that ricin
- know as the perfect poison for leaving no trace - did not get into Ali's possession.
Computer analysis showed that Ali first began trawling the internet for information on poisons such as abrin, ricin
and cyanide in October last year.
Ali first approached the undercover agent by private message in January, asking to buy ricin
, before paying him using online currency Bitcoin on February 4.
The judge commended law enforcement agencies in Britain and the US for ensuring that ricin
- known as the perfect poison for leaving no trace - did not get into Ali's possession.
In his defence, Ali told jurors that he was just "curious" and wanted to test the boundaries of the Dark Web, unaware that ricin