arsenic
Chemical element with symbol As and atomic number 33
Also known as As · element 33 · 33As
- Symbol
- As
- Atomic number
- 33
1
- 33
- Mass
- 74.9216 Da
1
Sources- 1.Stated in Atomic weights of the elements 2013 (IUPAC Technical Report)Retrieved 2020-10-19
- 74.9216 Da
- Melting point
- 1,135°F
- Density
- 5.73 g/cm³
- Discovered by
- Discovered
- 13th century
Overview
All data
230 statements · 33% with external sources · numbers in brackets are citations
- Oxidation state
- -3
- 3
- 5
- 1
- 2
- 4
- -2
- -1
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- 0
- Minimal lethal dose
- 10 milligram per kilogram route of administration: intraperitoneal injection · afflicts: guinea pig
- 300 milligram per kilogram route of administration: subcutaneous injection · afflicts: guinea pig
- 300 milligram per kilogram route of administration: subcutaneous injection · afflicts: rabbit
- 100 milligram per cubic metre route of administration: inhalation · afflicts: cat · members / parts: arsenic trichloride
- 200 milligram per cubic metre route of administration: inhalation · afflicts: cat · members / parts: arsenic trichloride
- 338 parts per million route of administration: inhalation · afflicts: laboratory mouse · members / parts: arsenic trichloride
- Median lethal dose (LD50)
- 46.2 milligram per kilogram route of administration: intraperitoneal injection · afflicts: laboratory mouse
- 1,000 milligram per kilogram route of administration: intraperitoneal injection · afflicts: laboratory mouse
- 13.39 milligram per kilogram route of administration: intraperitoneal injection · afflicts: laboratory rat
- 144 milligram per kilogram route of administration: oral administration · afflicts: laboratory mouse
- 145 milligram per kilogram route of administration: oral administration · afflicts: laboratory mouse
- 763 milligram per kilogram route of administration: oral administration · afflicts: laboratory rat
- 0.285 g/L afflicts: Daphnia · runtime: 48 h
- 20 milligram per kilogram afflicts: laboratory rat · route of administration: oral administration
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- 794 milligram per kilogram afflicts: laboratory mouse · route of administration: oral administration
- 50 milligram per kilogram afflicts: rabbit · route of administration: oral administration
- 38 milligram per kilogram afflicts: dog · route of administration: oral administration
- 75 milligram per kilogram afflicts: rabbit · route of administration: oral administration
- Time-weighted average exposure limit
- 0.2 milligram per cubic metre applies to jurisdiction: Egypt, India
- 0.05 milligram per cubic metre applies to jurisdiction: Australia, New Zealand
- 0.1 milligram per cubic metre applies to jurisdiction: Belgium, United Kingdom
- 0.01 milligram per cubic metre applies to jurisdiction: Denmark, Finland
- 0.02 milligram per cubic metre applies to jurisdiction: Norway
- 0.5 milligram per cubic metre applies to jurisdiction: Thailand, Philippines
- 0.01 milligram per cubic metre applies to jurisdiction: United States · runtime: 8 h
- Immediately dangerous to life or health
- 5 milligram per cubic metre
- Sublimation temperature
- 1,135°F
- Vapor pressure
- 0 millimetre of mercury temperature: 68°F
- Ceiling exposure limit
- 0.002 milligram per cubic metre applies to jurisdiction: none · runtime: 15 min
- Canonical SMILES
- [As]
1
- [As]
- Formula
- As
1
- As
- Part of
- period 4 follows: germanium · followed by: selenium
- group 15 follows: phosphorus · followed by: antimony
- tailings
- arsenide(3-)
- metalloid
- Ionic radius
- 0.58 ångström coordination number: 6 · charge number: 3
- 0.34 ångström coordination number: 4 · charge number: 5
- 0.46 ångström coordination number: 6 · charge number: 5
- Subject has role
- occupational carcinogen
- carcinogen
1
Sources- 1.Stated in California Proposition 65 list of chemicalsoehha.ca.gov/chemicals/arsenicRetrieved 2020-02-19
- 2022 Harmonized System Code
- 280480
1
- 280480
- Production rate
- 61,500 tonne per year valid in place: Earth · valid in period: 2023
1
- 58,000 tonne per year valid in place: Earth · valid in period: 2024
1
- 1,000 tonne per year valid in place: Belgium · valid in period: 2023, 2024
1
- 24,000 tonne per year valid in place: People's Republic of China · valid in period: 2023, 2024
1
- 40 tonne per year valid in place: Japan · valid in period: 2023, 2024
1
- 6,000 tonne per year valid in place: Morocco · valid in period: 2023, 2024
1
- 30,000 tonne per year valid in place: Peru · valid in period: 2023
1
- 27,000 tonne per year valid in place: Peru · valid in period: 2024
1
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- 61,500 tonne per year valid in place: Earth · valid in period: 2023
- Thermal conductivity
- 50 watt per metre kelvin
- Electrical conductivity
- 3,030,000 siemens per metre
- Specific heat capacity
- 328.5 joule per kilogram kelvin
- Electrical resistivity
- 3.33e-7 ohm metre
- Ionization energy
- 9.7886 eV
1
Sources- 1.“NIST Atomic Spectra Database, Ionization Energies”physics.nist.gov/asdRetrieved 2026-09-18
- 18.5892 eV
1
Sources- 1.“NIST Atomic Spectra Database, Ionization Energies”physics.nist.gov/asdRetrieved 2026-09-18
- 28.349 eV
1
Sources- 1.“NIST Atomic Spectra Database, Ionization Energies”physics.nist.gov/asdRetrieved 2026-09-18
- 9.7886 eV
- Electron configuration
- [Ar] 4s² 3d¹⁰ 4p³
1
- [Ar] 4s² 3d¹⁰ 4p³
- Atomic radius
- 115 picometre
- Covalent radius
- 119 picometre
- Van der Waals radius
- 185 picometre
On other databases
98 identifiers linking arsenic across the web's reference databases
- AHECC 2017 ID28048000
- Arabic Ontology lexical concept ID151078424
- Australian Educational Vocabulary IDscot/1661
- BabelNet ID00005917n
- Banglapedia ID (Bangla edition)আর্সেনিক
- BBC Things IDb340fd57-89de-4436-9397-d4c23c9f9d6a
- Bibliothèque nationale de France ID11971740q
- Biblissima authority IDQ296844
- BNCF Thesaurus ID25597
- Brockhaus Enzyklopädie online IDarsen
- CA PROP 65 IDarsenic
- CAB ID43961
- CAMEO Chemicals ID171
- CAS Registry Number7440-38-2
- ChEBI ID27563
- ChemSpider ID4514330
- Climate Policy Radar TopicsQ1226
- COD ID5000219
- De Agostini IDarsènico+(sostantivo)
- Dewey Decimal Classification669.75
- DSSTOX compound identifierDTXCID703886
- DSSTox substance IDDTXSID4023886
- EC number231-148-6
- ECHA Substance Infocard ID100.028.316
- Encyclopædia Universalis IDarsenic-toxicologie
- Encyclopedia of China (Second Edition) ID229020
- Encyclopedia of China (Third Edition) ID (2026)1nD6lT
- Encyclopedia of China (Third Edition) old ID (2021)464380
- Encyclopédie berbère article ID2598
- FactGrid item IDQ978667
- Freebase ID/m/027rq1r
- Global Energy Monitor Wiki IDArsenic
- GND ID4003041-6
- Gran Enciclopèdia Catalana IDas-0
- Gran Enciclopèdia Catalana ID (former scheme)0005554
- Great Norwegian Encyclopedia IDarsen
- Great Russian Encyclopedia portal IDmysh-iak-c1dc4a
- Gujarati Vishwakosh entryઆર્સેનિક
- Harper's tagarsenic
- HCIS ID287
- Hrvatska enciklopedija IDarsen
- HSDB ID509
- ICSC ID0013
- InChIInChI=1S/As
- InChIKeyRQNWIZPPADIBDY-UHFFFAOYSA-N
- Interlingual Index IDi113895
- J9U entity ID987007294803405171
- JSTOR topic ID (archived)arsenic
- KBpedia IDArsenic
- KEGG IDC06269
- Krugosvet article (archived)nauka_i_tehnika/himiya/MISHYAK.html
- Lex IDarsen
- Library of Congress Authorities IDsh85007449
- LiverTox IDArsenic
- MeSH descriptor IDD001151
- MeSH tree codeD01.268.513.249
- Microsoft Academic ID (discontinued)502230775
- Minerals.net mineral and gemstone IDmineral/arsenic
- Museum-digital tag ID13814
- NALT ID12370
- National Library of Latvia ID000306779
- NDF-RT IDN0000022206
- NDL Authority ID00563271
- NE.se IDarsenik
- NicoNicoPedia word article IDヒ素
- NL CR AUT IDph138910
- OmegaWiki Defined Meaning255
- OpenAlex IDC502230775
- OSHA Occupational Chemical Database ID528
- PACTOLS thesaurus IDpcrt5mFxzmQ9rX
- PesticideInfo chemical IDPRI1294
- PM20 ware ID142006
- PSH ID5803
- PubChem CID5359596
- Quora topic IDArsenic-As
- RationalWiki IDArsenic
- RTECS numberCG0525000
- RxNorm CUI1111
- ScienceDirect topic IDchemistry/arsenic
- Spanish Cultural Heritage thesauri IDmaterias/1009757
- SureChEMBL ID4563027
- Treccani IDarsenico
- U.S. National Archives Identifier10637420
- UK Archival Thesaurus IDf2/mt225/4347/7620
- UMLS CUIC0003818
- UN Thesaurus ID1000397
- UniChem compound ID1097606
- UNIIN712M78A8G
- USGS Thesaurus ID1396
- Vikidia article IDfr:Arsenic