Consensus flow list

Potassium-40

fo-01e8baae65fc016f

Identity

Type
Isotope
CAS
13966-00-2
EC
—
Origin
EF 3.1 hybrid_name_cas_v1
Changes
50 across every transformer

Structure

Structure diagram for Potassium-40

This substance carries 2 candidate structures; the diagram is the first one RDKit could parse, not a settled answer.

Properties

PropertyValue
Decay mode chemrof:decay_mode IS=0.0117±0.1%; β-=89.28±1.3%; β+=10.72±1.3%
Half life chemrof:half_life 1248000000.0
Has element chemrof:has_element {'@id': 'https://vocab.brightway.dev/flow-objects/fo-c0788a9248a84b5b'}
InChI2D key string chemrof:inchi2d_key_string ZLMJMSJWJFRBEC-OUBTZVSYSA-N
InChI2D string chemrof:inchi2d_string InChI=1S/K/i1+1
Isomeric SMILES string chemrof:isomeric_smiles_string [40K]
Isotope isotope {"nuclide":"40K","mass_number":40,"atomic_mass_and_uncertainty_u":"39.963998165 ± 0.00000006","half_life_and_uncertainty":"1.248 Gy ± 0.003","decay_modes":"IS=0.0117±0.1%; β-=89.28±1.3%; β+=10.72±1.3%","discovery_year":"1935","specific_activity_bq_per_g":"264500.88326004","specific_activity_bq_per_g_value":264500.88326004,"half_life_chemlin":"1.2522(27)e9 years (DDEP-2025 [10])","chemlin_url":"https://www.chemlin.org/isotope/potassium-40","isomer_resolution":{"wanted_nuclide":"K-40","expected_half_life_days":455832000000.0,"attempted_slugs":["40"],"attempted_urls":["https://www.chemlin.org/isotope/potassium-40"],"strategy":"half_life_agrees_with_pubchem","selected_slug":"potassium-40","selected_half_life":"1.2522(27)e9 years (DDEP-2025 [10])","selected_half_life_days":457366050000.0,"half_life_ratio_to_pubchem":1.0033653846153847,"alternates":[]},"symbol":"K","isomeric_state":"","metastable":false}
Isotope lookup isotope_lookup {"is_kbq_candidate":true,"matched":true,"matched_on":"Potassium-40","claimed_nuclide":"K-40","resolved_nuclide":"K-40","state_resolution":{"claimed_state":"","selected_state":"","strategy":"state_taken_as_written","candidates":[]},"checks":[{"check":"ground_state_does_not_decay_by_isomeric_transition","passed":true,"detail":"IS=0.0117±0.1%; β-=89.28±1.3%; β+=10.72±1.3%"},{"check":"half_life_sources_agree","passed":true,"detail":{"pubchem_days":455832000000.0,"chemlin_days":457366050000.0,"ratio":1.0033653846153847}}],"reason":"","source":"pubchem_pug_view_annotation_heading","sources":["pubchem_pug_view_annotation_heading","https://www.chemlin.org"],"isomer_resolution":{"wanted_nuclide":"K-40","expected_half_life_days":455832000000.0,"attempted_slugs":["40"],"attempted_urls":["https://www.chemlin.org/isotope/potassium-40"],"strategy":"half_life_agrees_with_pubchem","selected_slug":"potassium-40","selected_half_life":"1.2522(27)e9 years (DDEP-2025 [10])","selected_half_life_days":457366050000.0,"half_life_ratio_to_pubchem":1.0033653846153847,"alternates":[]}}
IUPAC name chemrof:IUPAC_name potassium-40
Molecular formula chemrof:molecular_formula K
Molecular mass chemrof:molecular_mass 39.964
Monoisotopic mass chemrof:monoisotopic_mass 39.963998
Nucleon number chemrof:nucleon_number 40
Relationships relationships {"parent_element_flow_object_id":"fo-c0788a9248a84b5b","relationship_type":"isotope_of"}
SMILES string chemrof:smiles_string [K]
Symbol chemrof:symbol K

Known URLs

7

Where else this substance is described. Collected while the pipeline resolved it — from ChEBI's cross-references, from PubChem's identifier list, and from the CAS number — so a link here is a record the merge actually read, not a search it suggests.

Resource URL Recorded by
CAS Common Chemistry https://commonchemistry.cas.org/detail?cas_rn=13966-00-2 enrich_references.pubchem_identifier_url
ChemLin https://www.chemlin.org —
ChemLin https://www.chemlin.org/isotope/potassium-40 —
PubChem https://pubchem.ncbi.nlm.nih.gov/compound/6328542 enrich_references.pubchem_compound
PubChem https://pubchem.ncbi.nlm.nih.gov/element/19 —
PubChem https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/element/19/JSON —
wikidata.org https://www.wikidata.org/wiki/Q2251076 enrich_references.pubchem_identifier_url

Elementary flows

14
Flow Context Source Unit CFs
29068999-6556-11dd-ad8b-0800200c9a66 Environmental → Air → Aircraft cruise height EF 3.1 kBq 0
08a91e70-3ddc-11dd-97ca-0050c2490048 Environmental → Air → Ground level → Urban (>1000 people/square mile) EF 3.1 kBq 0
08a91e70-3ddc-11dd-97c9-0050c2490048 Environmental → Air → Long-term EF 3.1 kBq 0
08a91e70-3ddc-11dd-97cb-0050c2490048 Environmental → Air → Medium stack, <150 meters → Rural (<1000 people/square mile) EF 3.1 kBq 0
08a91e70-3ddc-11dd-97c8-0050c2490048 Environmental → Air → Unknown EF 3.1 kBq 0
29068998-6556-11dd-ad8b-0800200c9a66 Environmental → Ground → Agricultural EF 3.1 kBq 0
2906899a-6556-11dd-ad8b-0800200c9a66 Environmental → Ground → Non-agricultural EF 3.1 kBq 0
2906899b-6556-11dd-ad8b-0800200c9a66 Environmental → Ground → Unknown EF 3.1 kBq 0
08a91e70-3ddc-11dd-97cd-0050c2490048 Environmental → Water → Long-term EF 3.1 kBq 0
08a91e70-3ddc-11dd-97cf-0050c2490048 Environmental → Water → Ocean EF 3.1 kBq 0
dc404887629067ca9d5c2245e52200bb4e6296c5 Environmental → Water → River bafu algorithm addition Bq 0
08a91e70-3ddc-11dd-97cc-0050c2490048 Environmental → Water → Surface water EF 3.1 kBq 0
001ab8a2c6a4c76be95ecf6a8c7584bd44450830 Environmental → Water → Unconfined aquifer ecoinvent algorithm addition kBq 0
08a91e70-3ddc-11dd-97ce-0050c2490048 Environmental → Water → Unknown EF 3.1 kBq 0

History

Everything that changed this substance (50 changes)

Open the changes page

Full record

Flow object JSON 
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      "half_life_and_uncertainty": "1.248 Gy ± 0.003",
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}

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