Ontology mapping
- Primary identifier
-
kgmicrobe.compound:k2so4_x_7_h2o - Ontology term
-
CHEBI:32036— potassium sulfate - Ontology label
- potassium sulfate
Nutritional roles
- Role
- SULFUR_SOURCE
- Confidence
- 0.8
- Evidence
- Reference type
- COMPUTATIONAL_PREDICTION
- Reference text
- Inferred from curated media-role name pattern
- Curator note
- Provisional role from a curated name-pattern rule; review recommended.
- Role
- MINERAL_SOURCE
- Confidence
- 0.8
- Evidence
Synonyms (2)
| Synonym | Type | Source | Occurrences |
|---|---|---|---|
| K2SO4·7H2O | HYDRATE_FORM | kg_microbe | |
| K2SO4・7H2O | HYDRATE_FORM | kg_microbe |
Evidence (3)
DATABASE_MATCH
via CultureMech
Imported from CultureMech pipeline, quality=DIRECT_MATCH
DATABASE_MATCH
via MIM curation (#321)
molecular_formula '2K.O4S' -> '2K.O4S.7H2O'. The recorded value described the anhydrous salt while the label names a hydrate, understating the mass by 18 g/mol per water. Corrected because the label states 7 water(s) of hydration, and the recorded formula was byte-identical to the anhydrous parent CHEBI:32036's ChEBI formula ('2K.O4S') — the mark of a value inherited from the parent rather than measured for this record. Water appended in ChEBI's own dot-separated notation.
CURATOR_JUDGMENT
via MIM curation (#344)
mediadive.compound:1920 still carries the source label 'K2SO4 x 7 H2O', but no exact ontology term or CAS has been verified for that stated hydration count. CHEBI:32036 (potassium sulfate) is retained only as the closest anhydrous parent while the source label keeps its local kgmicrobe.compound identity.
Occurrence statistics
- Total occurrences
- 4
- Distinct media
- 4
Curation history
| Timestamp | Curator | Action | New status | Changes |
|---|---|---|---|---|
| 2026-03-09T06:54:18.022301+00:00 | import_from_culturemech | IMPORTED | MAPPED | Initial import from CultureMech pipeline |
| 2026-04-09T00:32:50.689620+00:00 | enrich_mim_cas_rn_batch | CAS_RN_ADDED | MAPPED | Added CAS-RN 7778-80-5 from CultureBotHT/compounds_to_cas.csv |
| 2026-04-18T00:00:00+00:00 | cbclaw_kg_microbe_sweep LLM | ADDED_SYNONYMS | MAPPED | Added 2 synonyms from kg-microbe P4.4 enrichment: K2SO4·7H2O, K2SO4・7H2O |
| 2026-05-01T07:35:34.168251+00:00 | auto_classify_ingredient_type | AUTO_CLASSIFY_INGREDIENT_TYPE | set ingredient_type=SINGLE_INGREDIENT (CHEBI primary) | |
| 2026-05-01T08:08:30.165546+00:00 | auto_classify_ingredient_type | AUTO_BACKFILL_CHEBI_CHEMISTRY | molecular_formula=2K.O4S; inchi=InChI=1S/2K.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*; smiles=O=S(=O)([O-])[O-].[K+].[K+] | |
| 2026-05-02T03:12:15.254419+00:00 | auto_classify_ingredient_type | AUTO_CLASSIFY_INGREDIENT_TYPE | set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula)) | |
| 2026-06-02T07:05:13.390265+00:00 | infer_roles_from_name_lists | ANNOTATED | Added media role: MINERAL (confidence: 0.80) | |
| 2026-06-09T05:23:46.780393+00:00 | correct_stale_ontology_labels.py | CORRECTED | ontology_label 'K2SO4 x 7 H2O' -> 'potassium sulfate': synced to canonical CHEBI label (preferred_term 'K2SO4 x 7 H2O' 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.SULFUR_SOURCE | |
| 2026-07-20T20:01:42.981644+00:00 | migrate_media_roles_to_facets | CORRECTED | Added nutritional role(s) MINERAL_SOURCE missed by the initial #128 migration: the residual MINERAL_SOURCE bucket was suppressed whenever any other target existed, which dropped the bulk cation from salts whose other role describes the anion (e.g. MgSO4). | |
| 2026-08-13T00:00:00+00:00 | add_water_of_hydration | ADDED_WATER_OF_HYDRATION | molecular_formula '2K.O4S' -> '2K.O4S.7H2O' (#321); the label states 7 water(s) of hydration, and the recorded formula was byte-identical to the anhydrous parent CHEBI:32036's ChEBI formula ('2K.O4S') — the mark of a value inherited from the parent rather than measured for this record. Water appended in ChEBI's own dot-separated notation. | |
| 2026-08-27T03:16:39.519057+00:00 | refresh_occurrence_statistics | CORRECTED | occurrence_statistics 1/1 -> 138/138 (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] | |
| 2026-08-29T04:18:06.717841+00:00 | hydrate_family_cas | CORRECTED | cas_rn 7778-80-5 REMOVED, not replaced: it is the anhydrous K2SO4 CAS, and this record names a hydrate -- a different substance with a different formula weight. ChEBI has no term for this hydration state, so no authoritative value can be substituted. The grounding is separately wrong (#321); this corrects only the CAS (#334). | |
| 2026-09-12T00:00:00+00:00 | fix_malformed_hydrate_identities | LOCALIZED_MALFORMED_HYDRATE_IDENTITY | MAPPED | identifier CHEBI:32036 -> kgmicrobe.compound:k2so4_x_7_h2o; mapping_quality EXACT_MATCH -> CLOSE_MATCH. Cleared unverified chemical_properties {'data_source': 'CultureBotHT/compounds_to_cas.csv', 'retrieval_date': '2026-04-09T00:32:50.689620+00:00', 'molecular_formula': '2K.O4S.7H2O', 'inchi': 'InChI=1S/2K.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2', 'smiles': 'O=S(=O)([O-])[O-].[K+].[K+]'} and marked 0 anhydrous or wrong-hydrate synonym(s) as REJECTED_LABEL for mediadive.compound:1920 (#344). |
| 2026-09-12T00:00:00+00:00 | fix_malformed_hydrate_identities | REFRESHED_MALFORMED_SULFATE_OCCURRENCES | MAPPED | occurrence_statistics 138/138 -> 4/4 after moving CaSO4/K2SO4 x 7 H2O memberships off the anhydrous parent identifiers (#344). |