Arsenic has to smell nor any taste.
Arsenic does not smell like anything as arsenic has no smell or any taste so you cannot tell if it's in your food, water etc.
Arsenic was commonly used as a murder poison because of the lack of smell or taste.
Arsenic trioxide was considered the perfect murder weapon in that its symptoms of vomiting and diarrhea were very like those of many common ailments, so that even doctors were unlikely to diagnose arsenic poisoning as the cause of an illness or death, and surgeons who carried out autopsies were unlikely to find evidence .
The immediate symptoms of acute arsenic poisoning include vomiting, abdominal pain and diarrhea.
These are followed by numbness and tingling of the extremities, muscle cramping and death, in extreme cases.
For such a long time, arsenic was the perfect poison.
It is odorless, colorless and tasteless, so it's difficult to detect when slipped into a food or beverage.
Its effects are gradual and cumulative deflecting suspicion from the killer.
The symptoms of arsenic poisoning can be acute, or severe and immediate, or chronic, where damage to health is experienced over a longer period.
This will often depend on the method of exposure.
A person who has swallowed arsenic may show signs and symptoms within 30 minutes.