MgSO47H2O — MIM

Ontology mapping

Primary identifier: CHEBI:31795
Ontology label: magnesium sulfate heptahydrate

Nutritional roles

Role
SULFUR_SOURCE
Confidence
1.0
Evidence
- Reference text
  CultureMech database (1 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 (1 occurrences). High confidence based on 'Defined component' property.
Role
MINERAL_SOURCE
Confidence
0.8
Evidence

Synonyms (10)

Synonym	Type	Source
Role: Mineral source; Properties: Defined component, Simple component, Inorganic compound	RAW_TEXT	CultureMech
.MgSO4	EXACT_SYNONYM	kg_microbe
MgSO	EXACT_SYNONYM	kg_microbe
MgSO 4	EXACT_SYNONYM	kg_microbe
MgSO2	EXACT_SYNONYM	kg_microbe
MgSO4 x 7 H20	ALTERNATE_FORM	kg_microbe
bitter salt	EXACT_SYNONYM	kg_microbe
epsom salt	EXACT_SYNONYM	kg_microbe
epsomite	EXACT_SYNONYM	kg_microbe
magnesium sulfate--water (1/7)	EXACT_SYNONYM	kg_microbe

Chemical properties

Cas rn: 10034-99-8
Data source: CultureBotHT compounds_to_cas.csv
Retrieval date: 2026-04-05T21:48:45.359004+00:00
Molecular formula: 7H2O.Mg.O4S
Inchi: InChI=1S/Mg.H2O4S.7H2O/c;1-5(2,3)4;;;;;;;/h;(H2,1,2,3,4);7*1H2/q+2;;;;;;;;/p-2
Smiles: O=S(=O)([O-])[O-].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[Mg+2]

Evidence (1)

DATABASE_MATCH via CultureMech

Imported from CultureMech pipeline, quality=DIRECT_MATCH

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
2026-04-05T21:48:45.359007+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: MgSO47H2O)
2026-04-18T00:00:00+00:00	cbclaw_kg_microbe_sweep LLM	ADDED_SYNONYMS	MAPPED	Added 9 synonyms from kg-microbe P4.4 enrichment: .MgSO4, MgSO, MgSO 4, MgSO2, MgSO4 x 7 H20, ... (4 more)
2026-05-01T07:35:34.784809+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (CHEBI primary)
2026-05-01T08:08:30.827076+00:00	auto_classify_ingredient_type	AUTO_BACKFILL_CHEBI_CHEMISTRY		molecular_formula=7H2O.Mg.O4S; inchi=InChI=1S/Mg.H2O4S.7H2O/c;1-5(2,3)4;;;;;;;/h;(H2,1,; smiles=O=S(=O)([O-])[O-].[H]O[H].[H]O[H].[H]O[H].[H]O[H].
2026-05-02T03:12:16.464620+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-05-29T23:35:36.111902+00:00	extract_roles_from_synonyms	ANNOTATED		Added media role: MINERAL (confidence: 1.00)
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).
2026-08-10T00:00:00+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 'magnesium sulfate heptahydrate'; it matches the ChEBI synonym 'magnesium sulfate--water (1/7)' on CHEBI:31795. 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).
2026-08-15T00:00:00+00:00	fix_hydrate_terms_and_twins	MERGED_INTO		Merged into CHEBI:31795 'MgSO4 x 7 H2O'; occurrences transferred. 'MgSO47H2O' and 'MgSO4 x 7 H2O' are the same substance written two ways — no separator at all; already on the correct term, so this is a duplicate identifier rather than a wrong one — so the pair escaped dedup, and the loser was then grounded to the nearest term lexical matching could reach: CHEBI:31795 ('magnesium sulfate heptahydrate'), 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.