Tetramethyl ammonium

Ontology mapping

Primary identifier: kgmicrobe.compound:tetramethyl_ammonium
Ontology term: CHEBI:35273 — quaternary ammonium salt
Ontology label: quaternary ammonium salt
kg-microbe node: kgmicrobe.compound:tetramethyl_ammonium

Synonyms (2)

Synonym	Type	Source	Occurrences
Role: Nutrient source; Properties: Inorganic compound, Defined component, Simple component	RAW_TEXT	CultureMech
Role: Nutrient source; Properties: Defined component, Inorganic compound, Simple component	RAW_TEXT	CultureMech

Rejected enrichment labels (4)

Provenance-only candidates: these are not synonyms and do not resolve to this record.

Rejected label	Disposition	Source
N,N,N-trimethylmethanaminium	REJECTED_LABEL	kg_microbe
TETRAMETHYLAMMONIUM ION	REJECTED_LABEL	kg_microbe
tetramethylammonium	REJECTED_LABEL	kg_microbe
tetramethylazanium	REJECTED_LABEL	kg_microbe

Evidence (2)

DATABASE_MATCH via CultureMech

SUPERSEDED (#315): describes the bare ion identity, not the complete salt or ion pair. Original note follows. Imported from CultureMech pipeline, quality=DIRECT_MATCH

CURATOR_JUDGMENT via MIM curation (#315)

The culture-media surface form names tetramethyl ammonium as a supplied ingredient; CHEBI:46020 denotes only the cation, which cannot be supplied as a standalone neutral compound. CHEBI:35273 is the nearest verified whole-substance salt parent. No exact local ChEBI term for 'Tetramethyl ammonium' was found, so MAPPING_SEMANTICS.md Section 3 uses a kgmicrobe.compound identity with the nearest whole-substance ChEBI parent.

Occurrence statistics

Total occurrences: 4
Distinct media: 4

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 51-92-3 from PubChem (via CHEBI:46020)
2026-04-18T00:00:00+00:00	cbclaw_kg_microbe_sweep LLM	ADDED_SYNONYMS	MAPPED	Added 4 synonyms from kg-microbe P4.4 enrichment: N,N,N-trimethylmethanaminium, TETRAMETHYLAMMONIUM ION, tetramethylammonium, tetramethylazanium
2026-04-19T07:39:23.955331+00:00	audit_mim_merge	MERGED_FROM_DUPLICATES	MAPPED	Absorbed 1 duplicate MIM record(s) into this one: Tetramethyl_Ammonium_2.yaml. Synonyms, curation_history, and occurrence counts were unioned/summed; winner selected by highest occurrence count with preferred_term readability tie-break.
2026-05-01T07:35:36.573852+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (CHEBI primary)
2026-05-01T08:08:32.644224+00:00	auto_classify_ingredient_type	AUTO_BACKFILL_CHEBI_CHEMISTRY		molecular_formula=C4H12N; inchi=InChI=1S/C4H12N/c1-5(2,3)4/h1-4H3/q+1; smiles=C[N+](C)(C)C
2026-05-02T03:12:18.791139+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-08-27T03:16:39.519949+00:00	refresh_occurrence_statistics	CORRECTED		occurrence_statistics 3/3 -> 4/4 (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]
2026-09-11T06:31:23.789310+00:00	fix_salt_ion_identity_overclaims	REGROUNDED_ION_OVERCLAIM	MAPPED	identifier CHEBI:46020 -> kgmicrobe.compound:tetramethyl_ammonium; mapping_quality -> NARROW_MATCH to CHEBI:35273 ('quaternary ammonium salt'). Cleared chemical_properties because they described the tetramethylammonium cation only, marked 4 bare-ion synonym(s) as REJECTED_LABEL, and kept the complete salt or ion-pair identity distinct (#315).