magnesium nitrate hexahydrate

Ontology mapping

Primary identifier: cas:13446-18-9
Ontology term: CHEBI:64736 — magnesium nitrate
Ontology label: magnesium nitrate

Synonyms (2)

Synonym	Type	Source	Occurrences
MgNO32 x 6 H2O	RAW_TEXT	mim-queue
Mg(NO3)2 x 6 H2O	RAW_TEXT	mediadive.ingredient:1763

Evidence (3)

DATABASE_MATCH via MediaDive ingredient 1763 (CAS 13446-18-9)

MediaDive REST gives CAS 13446-18-9 = magnesium nitrate hexahydrate for source name 'Mg(NO3)2 x 6 H2O'. CHEBI has only the anhydrous parent (CHEBI:64736 'magnesium nitrate'), so the hexahydrate is a narrowMatch to it, with cas:13446-18-9 preserved as the exact-identity primary (cf. ammonium molybdate tetrahydrate).

DATABASE_MATCH via CHEBI (parent)

Parent anhydrous term CHEBI:64736 'magnesium nitrate'; no hexahydrate term exists in CHEBI.

DATABASE_MATCH via MIM curation (#342)

mapping_quality NARROW_MATCH -> CLOSE_MATCH, predicate skos:narrowMatch -> skos:closeMatch. narrowMatch asserts this record is *narrower in meaning* than CHEBI:64736 ('magnesium nitrate') — a subsumption ChEBI itself denies: it files hydrates under CHEBI:35505 'hydrate', never under the anhydrous compound, which is not an ancestor even transitively. A hydrate is a distinct substance containing the anhydrous form, not a specialization of it. closeMatch claims similarity without subsumption. The ontology_id and the record's own identifier are unchanged.

Occurrence statistics

Total occurrences: 2
Distinct media: 2

Curation history

Timestamp	Curator	Action	New status	Changes
2026-04-30T18:43:03.698454+00:00	audit_import_ingredients[mim-queue]	CREATED_AS_UNMAPPED	UNMAPPED	Imported from mim-queue (source_id=mediadive.ingredient:1763); no CAS-RN or CHEBI/NCIT match. Curator review needed.
2026-05-11T08:04:31Z	mediaingredientmech-agentic-curation LLM	REVIEWED_FORMULA_SHORTHAND	UNMAPPED	Classified as a single inorganic salt hydrate and left unmapped because the source formula appears to abbreviate magnesium nitrate hexahydrate but is not locally verified as an exact ontology identity.
2026-06-16T00:00:00+00:00	salt_hydrate_pass	PROMOTED_TO_MAPPED	MAPPED	Promoted UNMAPPED_0444 'MgNO32 x 6 H2O' -> cas:13446-18-9 'magnesium nitrate hexahydrate', narrowMatch to parent CHEBI:64736 'magnesium nitrate'. MediaDive ingredient 1763 CAS 13446-18-9 confirms the hexahydrate; CHEBI lacks the hydrate term so cas: is the primary identifier with the parent as narrowMatch (Rule B1 registry rows added). Resolves the prior 'pending CAS evidence' review.
2026-08-13T00:00:00+00:00	regrade_hydrate_to_close_match	REGRADED_HYDRATE_TO_CLOSE_MATCH		mapping_quality NARROW_MATCH -> CLOSE_MATCH (#342); a hydrate is not subsumed by its anhydrous form, and ChEBI does not model it as such.
2026-08-27T03:16:39.518214+00:00	refresh_occurrence_statistics	CORRECTED		occurrence_statistics 0/0 -> 2/2 (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]