Arsenic is a chemical element with symbol As and atomic number 33. It is a metalloid with various allotropes and is commonly used in pesticides.

Feb 7, 2025 · History. Arsenic was known in the form of certain of its compounds long before it was clearly recognized as a chemical element. In the 4th century bce Aristotle wrote of a substance called sandarache, now believed to have been the mineral realgar, a sulfide of arsenic. Then, in the 1st century ce, the writers Pliny the Elder and Pedanius Dioscorides both described auripigmentum, a substance ...

Sep 19, 2023 · What is NIEHS Doing? Because of its significance as a global public health problem, studies of arsenic, arsenic metabolism, and the health effects associated with arsenic exposure are a priority for the National Institute of Environmental Health Sciences (NIEHS), the National Toxicology Program (NTP), and several other organizations involved in research, regulation, and health care.

Arsenic is an element that is widely distributed in the earth's crust. Elemental arsenic is ordinarily a steel grey metal-like material that sometimes occurs naturally. However, arsenic is usually found in the environment combined with other elements such as oxygen, chlorine, and sulfur. Arsenic combined with these elements is called inorganic arsenic.

Based on data from an epidemiology study conducted on a highly-exposed population, the inorganic arsenic lower limit on the benchmark dose for a 0.5% increased incidence of lung cancer was calculated to be 3 μg/kg bw per day (range: 2–7 μg/kg bw per day) using a range of assumptions to estimate total dietary exposure of the study population to inorganic arsenic from drinking water and food.

Dec 7, 2022 · Key facts. Arsenic is naturally present at high levels in the groundwater of several countries. Arsenic is highly toxic in its inorganic form. Contaminated water used for drinking, food preparation and irrigation of food crops poses the greatest threat to public health from arsenic.

Dec 3, 2023 · Arsenic is a metalloid element with symbol As and atomic number 33. Arsenic is a chemical element with the symbol As and atomic number 33, making it a part of the pnictogen or nitrogen group in the periodic table.This metalloid element is notorious for its toxicity. Arsenic exhibits a wide range of properties and plays diverse roles in both ancient and modern times.

The name derives from the Latin arsenicium and the Greek arsenikos for "masculine" or "male" because the ancients thought that metals were different sexes. Arsenic was known in prehistoric times for its poisonous sulfides. The German scientist and philosopher, Albert von Bollstadt (Albert the Great or Albertus Magnus) is thought to have obtained the metal around 1250.

Arseen on keemiline element järjenumbriga 33. Nimetus on tulnud kreekakeelsest sõnast arsenikon 'mehelik, tugev', millega Dioskurides 1. sajandil nimetas auripigmenti selle tugeva mürgisuse pärast.

Arseen is 'n chemiese element in die periodieke tabel met die simbool As en atoomgetal van 33. Dit is berug as 'n uiters giftige metaalagtige element met vele allotroopvorme ; geel, swart en grys is van die kleure wat dit kan hê.

1.4. Environmental occurrence. Arsenic is the 20 th most common element in the earth’s crust, and is emitted to the environment as a result of volcanic activity and industrial activities. Mining, smelting of non-ferrous metals and burning of fossil fuels are the major anthropogenic sources of arsenic contamination of air, water, and soil (primarily in the form of arsenic trioxide).

Arsenic. Arsenic appears in three allotropic forms: yellow, black and grey; the stable form is a silver-gray, brittle crystalline solid. It tarnishes rapidly in air, and at high temperatures burns forming a white cloud of arsenic trioxide.

Arsine (IUPAC name: arsane) is an inorganic compound with the formula As H 3.This flammable, pyrophoric, and highly toxic pnictogen hydride gas is one of the simplest compounds of arsenic. [4] Despite its lethality, it finds some applications in the semiconductor industry and for the synthesis of organoarsenic compounds.The term arsine is commonly used to describe a class of organoarsenic ...

Arsenic poisoning (or arsenicosis) is a medical condition that occurs due to elevated levels of arsenic in the body. [4] If arsenic poisoning occurs over a brief period of time, symptoms may include vomiting, abdominal pain, encephalopathy, and watery diarrhea that contains blood. [1] Long-term exposure can result in thickening of the skin, darker skin, abdominal pain, diarrhea, heart disease ...

Ongoing exposures to toxic chemicals such as arsenic continue to pose a significant threat to public health. The World Health Organization (WHO) estimates that > 200 million persons worldwide might be chronically exposed to arsenic in drinking water at concentrations above the WHO safety standard of 10 µg/L ().Arsenic is a metalloid element that is encountered primarily as arsenical compounds.

For most people, diet is the largest source of arsenic exposure, with usually smaller intakes from drinking water and air. Among foods, some of the highest levels are found in fish and shelfish; however, this arsenic

Arseen of arsenicum (symbool As; CAS No. 7440-38-2) is een niet-essentieel metaal dat voorkomt in verschillende vormen: • Totaal arseen • Anorganisch arseen: As III en As V (arseenzuur) • Organisch arseen: arsenobetaine (AsB), arsenocholine, dimethylarseen (DMA) en monomethylarseen (MMA)

Visual; Arsenic is a Silver. As has a CPK of #ff1493, Jmol of #bd80e3, and MOLCAS GV of #bd80e3. The Appearance of Element 33 is metallic grey. The Refractive Index of Arsenic (As) is 1.001552.

Arsenic (As) has an atomic mass of 33. Find out about its chemical and physical properties, states, energy, electrons, oxidation and more.

Arseen, not his real name, is an LGBTQ rights activist from the western province of Herat. He tells Afghan Witness (AW) how he was forced to leave his home after receiving death threats from the Taliban.