# Kiln — Curated database layer

> 356 toxicology databases, curated into one.

Kiln is the curated database layer. It resolves 356 toxicology and chemistry databases into a single queryable structure spanning 2.8B data points, 92% of them cross-linked so evidence about one chemical connects to everything else known about it.

## Key facts
- **356** — curated toxicology & chemistry databases
- **2.8B** — data points
- **92%** — cross-linked across sources

## What Kiln does

### Curated, not just collected
Heterogeneous public data is normalized into one consistent structure you can query.

### Cross-linked evidence
A chemical's records connect across sources, so one lookup surfaces everything known across the record.

### Traceable to origin
Every data point keeps its provenance back to the database it came from.

## Works closely with
- [Yard](https://toxindex.com/platform/yard.md): Raw data warehouse
- [Sage](https://toxindex.com/platform/sage.md): Conversational answer engine

## Frequently asked questions

**What is Kiln?**

Kiln is ToxIndex's curated database layer. It resolves 356 toxicology and chemistry databases into one queryable structure spanning 2.8B data points.

**How is Kiln different from a raw data dump?**

Heterogeneous public data is normalized into one consistent structure and cross-linked, so a single lookup surfaces everything known about a chemical instead of one silo. 92% of records connect to related entities.

**Where does a Kiln data point come from?**

Every data point keeps its provenance back to the source database it came from, so evidence stays traceable to origin.

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Canonical page: https://toxindex.com/platform/kiln