PubChem
Tier: Commercial-tier (but a U.S. government database)
What it is
PubChem, maintained by the U.S. National Center for Biotechnology Information (NCBI), is the largest open chemical database — every chemical substance has a CID with synonyms, structures, and cross-references.
Why we trust it
PubChem aggregates data from 800+ authoritative depositors (FDA, WHO, major pharma). While not a clinical source itself, it is the canonical registry for chemical identity and synonyms.
What we use it for
Synonym resolution (canonical_key ↔ alternate spellings). We rank PubChem last for clinical content — only used as a tiebreaker when no clinical source has an opinion.
How Suvo applies it
PubChem helps Suvo recognize that different labels may refer to the same compound using different names, spellings, salts, or registry identifiers. This improves scanning, catalog matching, and duplicate-compound detection.
Limits
PubChem is a chemical registry, not a clinical decision source. Suvo uses it for identity and synonym matching, then relies on stronger clinical, regulatory, or government sources for safety and timing guidance.