FeSO4

CHEBI:75832 chemically defined MAPPED CHEBI SYNONYM_MATCH

Ontology mapping

Primary identifier
CHEBI:75832
Ontology label
iron(2+) sulfate (anhydrous)
kg-microbe node
CHEBI:75832

Nutritional roles

Synonyms (14)

SynonymTypeSourceOccurrences
Role: Mineral source; Properties: Defined component, Inorganic compound, Simple component RAW_TEXT CultureMech
Role: Mineral source; Properties: Defined component, Inorganic compound, Solution RAW_TEXT CultureMech
Role: Mineral source; Properties: Defined component, Solution, Inorganic compound RAW_TEXT CultureMech
Role: Mineral source; Properties: Inorganic compound, Defined component, Simple component RAW_TEXT CultureMech
Role: Mineral source; Properties: Inorganic compound, Defined component, Solution RAW_TEXT CultureMech
Ferrous sulfate EXACT manual
Iron(II) sulfate EXACT manual
Fe(II)SO4 EXACT_SYNONYM kg_microbe
FeSO .7H O EXACT_SYNONYM kg_microbe
ferrous sulfate (anh.) EXACT_SYNONYM kg_microbe
iron sulfate (1:1) EXACT_SYNONYM kg_microbe
iron(2+) sulfate EXACT_SYNONYM kg_microbe
iron(2+) sulfate (anh.) EXACT_SYNONYM kg_microbe
iron(II) sulfate (1:1) EXACT_SYNONYM kg_microbe

Chemical properties

Cas rn
7720-78-7
Data source
PubChem API
Retrieval date
2026-04-05T19:52:08.779816+00:00
Molecular formula
Fe.O4S
Inchi
InChI=1S/Fe.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
Smiles
O=S(=O)([O-])[O-].[Fe+2]

Evidence (1)

DATABASE_MATCH via CultureMech

Imported from CultureMech pipeline, quality=DIRECT_MATCH

Occurrence statistics

Total occurrences
267
Distinct media
267

Curation history

TimestampCuratorActionNew statusChanges
2026-03-09T06:54:18.022301+00:00 import_from_culturemech IMPORTED MAPPED Initial import from CultureMech pipeline
2026-04-05T19:52:08.779861+00:00 fetch_cas_rn_from_pubchem ADDED_CAS_RN MAPPED Added CAS-RN:7720-78-7 from PubChem API via name lookup (FeSO4)
2026-04-05T23:44:36.684105+00:00 fetch_cas_rn_with_preprocessing ADDED_CAS_RN MAPPED Added CAS-RN:7720-78-7 from PubChem API (preprocessed) via name preprocessing (FeSO4 )
2026-04-17T12:00:00+00:00 synonym_expansion_cbclaw LLM ADDED_SYNONYMS MAPPED Added 2 synonyms for unmapped CultureMech surface forms
2026-04-18T00:00:00+00:00 cbclaw_kg_microbe_sweep LLM ADDED_SYNONYMS MAPPED Added 7 synonyms from kg-microbe P4.4 enrichment: Fe(II)SO4, FeSO .7H O, ferrous sulfate (anh.), iron sulfate (1:1), iron(2+) sulfate, ... (2 more)
2026-04-18T00:00:00+00:00 cbclaw_kg_microbe_sweep LLM ADDED_SYNONYMS MAPPED Added 8 synonyms from kg-microbe P4.4 enrichment: Fe(II)SO4, FeSO .7H O, Ferrous Sulfate, ferrous sulfate (anh.), iron sulfate (1:1), ... (3 more)
2026-04-19T07:39:23.955331+00:00 audit_mim_merge MERGED_FROM_DUPLICATES MAPPED Absorbed 1 duplicate MIM record(s) into this one: Feso4_2.yaml. Synonyms, curation_history, and occurrence counts were unioned/summed; winner selected by highest occurrence count with preferred_term readability tie-break.
2026-05-01T07:35:33.608340+00:00 auto_classify_ingredient_type AUTO_CLASSIFY_INGREDIENT_TYPE set ingredient_type=SINGLE_INGREDIENT (CHEBI primary)
2026-05-01T08:08:29.586683+00:00 auto_classify_ingredient_type AUTO_BACKFILL_CHEBI_CHEMISTRY molecular_formula=Fe.O4S; inchi=InChI=1S/Fe.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/; smiles=O=S(=O)([O-])[O-].[Fe+2]
2026-05-02T03:12:14.465282+00:00 auto_classify_ingredient_type AUTO_CLASSIFY_INGREDIENT_TYPE set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-05-29T23:35:36.111145+00:00 extract_roles_from_synonyms ANNOTATED Added media role: MINERAL (confidence: 1.00)
2026-06-09T05:23:46.764826+00:00 correct_stale_ontology_labels.py CORRECTED ontology_label 'FeSO4' -> 'iron(2+) sulfate (anhydrous)': synced to canonical CHEBI label (preferred_term 'FeSO4' unchanged).
2026-07-20T00:00:00+00:00 migrate_media_roles_to_facets ANNOTATED Migrated legacy media_roles to role facets (#128): MINERAL -> nutritional_roles.IRON_SOURCE
2026-08-10T00:00:00+00:00 regrade_synonym_matches REGRADED_EXACT_TO_SYNONYM mapping_quality EXACT_MATCH -> SYNONYM_MATCH (#317). The record's label does not equal the term's primary label 'iron(2+) sulfate (anhydrous)'; it matches the ChEBI synonym 'iron(II) sulfate' on CHEBI:75832. The schema defines EXACT_MATCH as a direct match to the term and SYNONYM_MATCH as a match to a known synonym, so the recorded grade overstated. ontology_id is unchanged — the term is correct. The SSSOM predicate is unaffected (both grades emit skos:exactMatch).
2026-08-27T03:16:39.518863+00:00 refresh_occurrence_statistics CORRECTED occurrence_statistics 50/50 -> 294/294 (media_count/total_occurrences), derived from distinct CultureMech recipe ids in the #337 occurrence table. The prior values came from the importer retired in #453, whose media_count counted a list truncated to 50 examples (#449). [source=ingredient_occurrences.tsv culturemech_rev=15a4da5c08 rows=194137 distinct_recipes=15257]
2026-09-12T00:00:00+00:00 fix_hydrate_local_identities REFRESHED_HYDRATE_OCCURRENCES MAPPED occurrence_statistics 294/294 -> 267/267 after moving reviewed hydrate source labels off their anhydrous parent identifiers and onto their exact hydrate identities (#652).