Sulfur — MIM

Ontology mapping

Primary identifier: CHEBI:33403
Ontology label: elemental sulfur
kg-microbe node: CHEBI:33403

Nutritional roles

Role
SULFUR_SOURCE
Confidence
1.0
Evidence
- Reference text
  CultureMech database (225 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 (225 occurrences). High confidence based on 'Defined component' property.

Environmental context

Environment term
ENVO:01000030
Environment label
marine hydrothermal vent biome
Relevance
NATURAL_SOURCE
Notes
Elemental sulfur deposits are a hallmark of hydrothermal vent environments.
Environment term
ENVO:00000051
Environment label
hot spring
Relevance
NATURAL_SOURCE
Notes
Elemental sulfur accumulates at terrestrial hot springs; substrate for sulfur-oxidizing thermophiles.

Synonyms (17)

Synonym	Type	Source
(for anaerobic media only)	RAW_TEXT	CultureMech
(powdered)	RAW_TEXT	CultureMech
(sterilized by steaming for 3 hours on 3 consecutive days)	RAW_TEXT	CultureMech
Role: Mineral source; Properties: Defined component, Inorganic compound, Simple component	RAW_TEXT	CultureMech
Role: Mineral source; Properties: Defined component, Simple component, Inorganic compound	RAW_TEXT	CultureMech
Schwefel	EXACT_SYNONYM	kg_microbe
azufre	EXACT_SYNONYM	kg_microbe
soufre	EXACT_SYNONYM	kg_microbe
theion	EXACT_SYNONYM	kg_microbe
sulfur	EXACT_SYNONYM	chebi_synonym_review
Sulphur	RAW_TEXT	MERGED_FROM_CHEBI:17909
Sulfur, precipitated	RAW_TEXT	MERGED_FROM_CHEBI:17909
Sulfur (powder)	RAW_TEXT	MERGED_FROM_kgmicrobe.compound:sulfur_powder
Sulfur powder	RAW_TEXT	MERGED_FROM_kgmicrobe.compound:sulfur_powder
Elemental sulphur	RAW_TEXT	MERGED_FROM_kgmicrobe.compound:sulfur_powder
Sulfur, powder	RAW_TEXT	mappings/culturemech_residual_triage.tsv
Sulfur, powdered	RAW_TEXT	mappings/culturemech_residual_triage.tsv

Rejected enrichment labels (4)

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

Rejected label	Disposition	Source
16S	REJECTED_LABEL	kg_microbe
sulfur atom	REJECTED_LABEL	kg_microbe
polysulfur	REJECTED_LABEL	kg_microbe
sulfur, homopolymer	REJECTED_LABEL	kg_microbe

Evidence (1)

CURATOR_JUDGMENT via MIM curation (#368)

A culture-media ingredient named sulfur, sulphur, or sulfur powder denotes weighable elemental sulfur, not ChEBI's sulfur atom or polysulfur terms.

Occurrence statistics

Total occurrences: 477
Distinct media: 477

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
2026-04-05T19:53:58.784685+00:00	fetch_cas_rn_from_pubchem	ADDED_CAS_RN	MAPPED	Added CAS-RN:231-722-6 from PubChem API via name lookup (Sulfur)
2026-04-05T23:47:03.514358+00:00	fetch_cas_rn_with_preprocessing	ADDED_CAS_RN	MAPPED	Added CAS-RN:231-722-6 from PubChem API (ontology label) via name preprocessing (sulfur)
2026-04-09T00:32:50.689620+00:00	enrich_mim_cas_rn_batch	CAS_RN_ADDED	MAPPED	Added CAS-RN 7783-06-4 from PubChem (via CHEBI:26833)
2026-04-18T00:00:00+00:00	cbclaw_kg_microbe_sweep LLM	ADDED_SYNONYMS	MAPPED	Added 6 synonyms from kg-microbe P4.4 enrichment: 16S, Schwefel, azufre, soufre, sulfur atom, ... (1 more)
2026-04-18T00:00:00+00:00	cbclaw_kg_microbe_sweep LLM	ADDED_SYNONYMS	MAPPED	Added 5 synonyms from kg-microbe P4.4 enrichment: 16S, Schwefel, azufre, soufre, theion
2026-04-19T07:39:23.955331+00:00	audit_mim_merge	MERGED_FROM_DUPLICATES	MAPPED	Absorbed 1 duplicate MIM record(s) into this one: Sulfur_2.yaml. Synonyms, curation_history, and occurrence counts were unioned/summed; winner selected by highest occurrence count with preferred_term readability tie-break.
2026-05-01T07:35:36.502167+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (CHEBI primary)
2026-05-01T08:08:32.581419+00:00	auto_classify_ingredient_type	AUTO_BACKFILL_CHEBI_CHEMISTRY		molecular_formula=S; inchi=InChI=1S/S; smiles=[S]
2026-05-02T03:12:18.697895+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-05-24T04:03:54.899342+00:00	env_context_phase3_initial	ANNOTATED		Added 2 environmental_context entries (issue #1, Phase 3 initial pass).
2026-05-29T23:35:36.113099+00:00	extract_roles_from_synonyms	ANNOTATED		Added media role: MINERAL (confidence: 1.00)
2026-06-09T05:23:46.840485+00:00	correct_stale_ontology_labels.py	CORRECTED		ontology_label 'Sulfur' -> 'sulfur atom': synced to canonical CHEBI label (preferred_term 'Sulfur' unchanged).
2026-07-05T00:00:00+00:00	cbclaw_followups_114 LLM	CORRECTED		Removed erroneous chemical_properties.cas_rn 7783-06-4 (that CAS is hydrogen sulfide, H2S / CHEBI:16136 — a PubChem false positive, not elemental sulfur), plus its data_source/retrieval_date. CHEBI:26833 (sulfur atom) mapping unchanged.
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
2026-08-27T03:16:39.519926+00:00	refresh_occurrence_statistics	CORRECTED		occurrence_statistics 51/225 -> 366/366 (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]
2026-09-11T13:41:33.694587+00:00	fix_sulfur_family	CORRECTED	MAPPED	identifier CHEBI:26833 -> CHEBI:33403 (elemental sulfur); absorbed duplicate Sulphur and Sulfur (powder) records; merged CultureMech membership from 3 identifiers into CHEBI:33403; added 7 resolving source label(s) and retained 4 atom/polysulfur-only label(s) as REJECTED_LABEL (#368).