Na2SeO3·5H2O

Ontology mapping

Primary identifier: CHEBI:131361
Ontology label: disodium selenite pentahydrate
kg-microbe node: CHEBI:131361

Nutritional roles

Role
TRACE_ELEMENT
Confidence
1.0
Evidence
- Reference type
  DATABASE_ENTRY
  Reference text
  Imported from CultureMech pipeline
  Curator note
  Original role text: Mineral

Synonyms (6)

Synonym	Type	Source
Role: Mineral source; Properties: Defined component, Inorganic compound, Simple component	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
Na2SeO3 . 5H2O	HYDRATE_FORM	kg_microbe
Na2SeO3 x 5 H2O (0.01% w/v)	HYDRATE_FORM	kg_microbe
Na2SeO3・5H2O	HYDRATE_FORM	kg_microbe

Chemical properties

Cas rn: 10102-18-8
Data source: PubChem API (ontology label)
Retrieval date: 2026-04-05T23:46:10.663385+00:00
Molecular formula: 2Na.O3Se.5H2O
Inchi: InChI=1S/2Na.H2O3Se/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
Smiles: O=[Se]([O-])[O-].[Na+].[Na+]

Evidence (2)

DATABASE_MATCH via CultureMech

Imported from CultureMech pipeline, quality=DIRECT_MATCH

DATABASE_MATCH via MIM curation (#321)

molecular_formula '2Na.O3Se' -> '2Na.O3Se.5H2O'. 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 5 water(s) of hydration, and the recorded formula was byte-identical to the anhydrous parent CHEBI:48843's ChEBI formula ('2Na.O3Se') — 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
2026-04-05T23:46:10.663395+00:00	fetch_cas_rn_with_preprocessing	ADDED_CAS_RN	MAPPED	Added CAS-RN:10102-18-8 from PubChem API (ontology label) via name preprocessing (Na2SeO3·5H2O)
2026-04-18T00:00:00+00:00	cbclaw_kg_microbe_sweep LLM	ADDED_SYNONYMS	MAPPED	Added 3 synonyms from kg-microbe P4.4 enrichment: Na2SeO3 . 5H2O, Na2SeO3 x 5 H2O (0.01% w/v), Na2SeO3・5H2O
2026-05-01T07:35:35.267837+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (CHEBI primary)
2026-05-01T08:08:31.339594+00:00	auto_classify_ingredient_type	AUTO_BACKFILL_CHEBI_CHEMISTRY		molecular_formula=2Na.O3Se; inchi=InChI=1S/2Na.H2O3Se/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1; smiles=O=[Se]([O-])[O-].[Na+].[Na+]
2026-05-02T03:12:17.086289+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-05-29T23:35:36.112221+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.TRACE_ELEMENT
2026-08-13T00:00:00+00:00	add_water_of_hydration	ADDED_WATER_OF_HYDRATION		molecular_formula '2Na.O3Se' -> '2Na.O3Se.5H2O' (#321); the label states 5 water(s) of hydration, and the recorded formula was byte-identical to the anhydrous parent CHEBI:48843's ChEBI formula ('2Na.O3Se') — 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:131361 'Na2SeO3 x 5 H2O'; occurrences transferred. 'Na2SeO3·5H2O' and 'Na2SeO3 x 5 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:48843 ('disodium selenite'), 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:48843 -> CHEBI:131361 (#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 'Na2SeO3 x 5 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:48843 -> CHEBI:131361 (#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.