Ontology mapping
- Primary identifier
-
CHEBI:31795 - Ontology label
- magnesium sulfate heptahydrate
- kg-microbe node
CHEBI:31795
Nutritional roles
- Role
- SULFUR_SOURCE
- Confidence
- 1.0
- Evidence
- Reference text
- CultureMech database (431 occurrences as 'Mineral source')
- Reference type
- DATABASE_ENTRY
- Url
- https://github.com/CultureBotAI/CultureMech
- Excerpt
- Role: Mineral source; Properties: Defined component, Inorganic compound, Simple component
- Curator note
- Widespread use in media formulations (431 occurrences). High confidence based on 'Defined component' property.
- Role
- MINERAL_SOURCE
- Confidence
- 0.8
- Evidence
Synonyms (17)
| Synonym | Type | Source | Occurrences |
|---|---|---|---|
| Role: Buffer; Properties: Inorganic compound, Defined component, Simple component | RAW_TEXT | CultureMech | |
| Role: Mineral source; Properties: Defined component, Inorganic compound, Simple component | RAW_TEXT | CultureMech | |
| Role: Mineral source; Properties: Defined component, Simple component, Inorganic compound | RAW_TEXT | CultureMech | |
| Role: Mineral source; Properties: Inorganic compound, Defined component, Simple component | RAW_TEXT | CultureMech | |
| Role: Mineral source; Properties: Inorganic compound, Simple component, Defined component | RAW_TEXT | CultureMech | |
| MgSO4 . 7H2O | HYDRATE_FORM | kg_microbe | |
| MgSO4 . H2O | HYDRATE_FORM | kg_microbe | |
| MgSO4 x 7 H2O (0.1% w/v) | HYDRATE_FORM | kg_microbe | |
| MgSO4 x 7 H2O (100 mM) | HYDRATE_FORM | kg_microbe | |
| MgSO4 x 7 H2O solution (25%) | HYDRATE_FORM | kg_microbe | |
| MgSO4 x 7 H2O to 15.0 g). | HYDRATE_FORM | kg_microbe | |
| MgSO4 x 7H2O | HYDRATE_FORM | kg_microbe | |
| MgSO4 x H2O | HYDRATE_FORM | kg_microbe | |
| MgSO4 x7 H2O | HYDRATE_FORM | kg_microbe | |
| MgSO4 x7H2O | HYDRATE_FORM | kg_microbe | |
| MgSO4 · 7H2O | HYDRATE_FORM | kg_microbe | |
| MgSO4 ·7H2O | HYDRATE_FORM | kg_microbe |
Rejected enrichment labels (2)
Provenance-only candidates: these are not synonyms and do not resolve to this record.
| Rejected label | Disposition | Source | Occurrences |
|---|---|---|---|
| MgSO4 x 6 H2O | REJECTED_LABEL | kg_microbe | |
| MgSO4 x 6H2O | REJECTED_LABEL | kg_microbe |
Chemical properties
- Cas rn
- 7487-88-9
- Data source
- OAK/CHEBI xref
- Retrieval date
- 2026-04-19T07:35:12.781730+00:00
- Molecular formula
- Mg.O4S.7H2O
- Inchi
- InChI=1S/Mg.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
- Smiles
- O=S(=O)([O-])[O-].[Mg+2]
Evidence (2)
DATABASE_MATCH
via CultureMech
Imported from CultureMech pipeline, quality=DIRECT_MATCH
DATABASE_MATCH
via MIM curation (#321)
molecular_formula 'Mg.O4S' -> 'Mg.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:32599's ChEBI formula ('Mg.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.
Occurrence statistics
- Total occurrences
- 0
- Distinct media
- 0
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 |
| 2026-04-05T21:48:45.354344+00:00 | fetch_cas_rn_from_culturebot_csv | ADDED_CAS_RN | MAPPED | Added CAS-RN:10034-99-8 from CultureBotHT compounds_to_cas.csv (matched: MgSO4·7H2O) |
| 2026-04-05T21:48:45.364868+00:00 | fetch_cas_rn_from_culturebot_csv | ADDED_CAS_RN | MAPPED | Added CAS-RN:7487-88-9 from CultureBotHT compounds_to_cas.csv (matched: MgSO4 x 7H2O) |
| 2026-04-18T00:00:00+00:00 | cbclaw_kg_microbe_sweep LLM | ADDED_SYNONYMS | MAPPED | Added 13 synonyms from kg-microbe P4.4 enrichment: MgSO4 . 7H2O, MgSO4 . H2O, MgSO4 x 6 H2O, MgSO4 x 6H2O, MgSO4 x 7 H2O (0.1% w/v), ... (8 more) |
| 2026-04-19T07:35:12.782058+00:00 | audit_mim_merge | MERGED_FROM_DUPLICATES | MAPPED | Absorbed 1 duplicate MIM record(s) into this one: Mgso4_X_7h2o.yaml. Synonyms, curation_history, and occurrence counts were unioned/summed; winner selected by highest occurrence count with preferred_term readability tie-break. |
| 2026-04-19T07:35:12.781730+00:00 | audit_resolve_risky_cas_rn | RESOLVED_CAS_RN_CONFLICT | MAPPED | CAS-RN conflict across merged group (10034-99-8|7487-88-9) resolved via OAK canonical xref: 7487-88-9 (match) |
| 2026-05-01T07:35:34.779227+00:00 | auto_classify_ingredient_type | AUTO_CLASSIFY_INGREDIENT_TYPE | set ingredient_type=SINGLE_INGREDIENT (CHEBI primary) | |
| 2026-05-01T08:08:30.820840+00:00 | auto_classify_ingredient_type | AUTO_BACKFILL_CHEBI_CHEMISTRY | molecular_formula=Mg.O4S; inchi=InChI=1S/Mg.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/; smiles=O=S(=O)([O-])[O-].[Mg+2] | |
| 2026-05-02T03:12:16.457983+00:00 | auto_classify_ingredient_type | AUTO_CLASSIFY_INGREDIENT_TYPE | set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula)) | |
| 2026-05-29T23:35:36.111891+00:00 | extract_roles_from_synonyms | ANNOTATED | Added media role: BUFFER (confidence: 1.00) | |
| 2026-05-29T23:35:36.111894+00:00 | extract_roles_from_synonyms | ANNOTATED | Added media role: MINERAL (confidence: 1.00) | |
| 2026-06-04T05:34:41.261481+00:00 | drop_implausible_roles | CORRECTED | Removed implausible media_role BUFFER: MgSO4 is a magnesium-sulfate mineral salt, not a pH buffer; the BUFFER role came from an erroneous CultureMech source synonym. MINERAL role retained. | |
| 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 'Mg.O4S' -> 'Mg.O4S.7H2O' (#321); the label states 7 water(s) of hydration, and the recorded formula was byte-identical to the anhydrous parent CHEBI:32599's ChEBI formula ('Mg.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. | |
| 2026-08-15T00:00:00+00:00 | fix_hydrate_terms_and_twins | MERGED_INTO | Merged into CHEBI:31795 'MgSO4 x 7 H2O'; occurrences transferred. 'MgSO4·7H2O' and 'MgSO4 x 7 H2O' are the same substance written two ways — `·` where the twin uses ` x ` — so the pair escaped dedup, and the loser was then grounded to the nearest term lexical matching could reach: CHEBI:32599 ('magnesium sulfate'), which does not carry the water its own label states. The #334 shadowing pattern. Found by cross-checking CultureBotAI/CultureMech#272, which grounds these labels correctly. Tombstoned REJECTED, SSSOM rows dropped. | |
| 2026-08-15T00:00:00+00:00 | fix_tombstone_pointers | REFRESHED_TOMBSTONE_ONTOLOGY_ID | ontology_id CHEBI:32599 -> CHEBI:31795 (#360). The merge set identifier and status but left ontology_mapping untouched, so this tombstone kept advertising a term it no longer asserts — anything indexing by ontology_id routed through it. Now agrees with the merge target 'MgSO4 x 7 H2O'. Provenance is unaffected: what the record used to assert is in this history. | |
| 2026-09-09T00:00:00+00:00 | fix_kg_microbe_node_id_drift | CORRECTED | kg_microbe_node_id CHEBI:32599 -> CHEBI:31795 (#554). The compatibility node id lagged a same-prefix identifier correction; the downstream node id must match the curated identifier unless a record intentionally crosses CURIE prefixes. | |
| 2026-09-22T20:41:14.285965+00:00 | claude LLM | REJECTED_PARENT_NAME_SYNONYMS | Retyped names of the parent compound or of a different hydrate as provenance-only REJECTED_LABEL, because this record is a distinct salt, hydrate or tombstone form and the label index resolved the parent's name here (#232): 'MgSO4 x 6 H2O'; 'MgSO4 x 6H2O'. Preserved original text and source metadata. No identity, mapping, role, or remaining-synonym claim was adjudicated. |