MgSO4·H2O

Ontology mapping

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

Nutritional roles

Role
SULFUR_SOURCE
Confidence
1.0
Evidence
- Reference text
  CultureMech database (2 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 (2 occurrences). High confidence based on 'Defined component' property.
Role
MINERAL_SOURCE
Confidence
0.8
Evidence

Synonyms (15)

Synonym	Type	Source
Role: Mineral source; Properties: Inorganic compound, Defined component, Simple component	RAW_TEXT	CultureMech
.MgSO4 x 7 H2O	HYDRATE_FORM	kg_microbe
MgSO 4 x 7 H2O	HYDRATE_FORM	kg_microbe
MgSO x 7 H2O	HYDRATE_FORM	kg_microbe
MgSO2 x 7 H2O	HYDRATE_FORM	kg_microbe
MgSO4.7H2O	HYDRATE_FORM	kg_microbe
MgSO4x7H2O	HYDRATE_FORM	kg_microbe
magnesium sulfate (1:1) heptahydrate	EXACT_SYNONYM	kg_microbe
magnesium sulphate heptahydrate	EXACT_SYNONYM	kg_microbe
sulfuric acid magnesium salt heptahydrate	EXACT_SYNONYM	kg_microbe
magnesium sulfate--water (1/7)	EXACT_SYNONYM	chebi_synonym_review
.MgSO4	RAW_TEXT	sssom_other_backfill
MgSO4•7H2O (Sigma 230391)	RAW_TEXT	sssom_other_backfill
MgSO4•7H2O(CAS: 10034-99-8)	RAW_TEXT	sssom_other_backfill
MgSO4•7H2O(Sigma 230391)	RAW_TEXT	sssom_other_backfill

Chemical properties

Cas rn: 10034-99-8
Data source: PubChem (via CHEBI:31795)
Retrieval date: 2026-04-09T00:32:50.689620+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: 5,673
Distinct media: 5,619

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 10034-99-8 from PubChem (via CHEBI:31795)
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 x 7 H2O, MgSO 4 x 7 H2O, MgSO x 7 H2O, MgSO2 x 7 H2O, MgSO4.7H2O, ... (4 more)
2026-05-01T07:35:34.804634+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (CHEBI primary)
2026-05-01T08:08:30.848640+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].
2026-05-02T03:12:16.488023+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-05-29T23:35:36.111923+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).
2026-08-27T03:16:39.519312+00:00	refresh_occurrence_statistics	CORRECTED		occurrence_statistics 2/2 -> 5619/5673 (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]
2026-09-02T22:41:49.137449+00:00	claude_sssom_surface_form_backfill	ADDED_SYNONYMS		Recovered 4 surface form(s) that the published SSSOM `other` carried but no curated record did, so a rebuild would have dropped them from KGX: '.MgSO4'; 'MgSO4•7H2O (Sigma 230391)'; 'MgSO4•7H2O(CAS: 10034-99-8)'; 'MgSO4•7H2O(Sigma 230391)'. Tokens already present on the kg-microbe ontology node were left out as redundant (#520).