National Center for Biotechnology Information
PubChem chemical database
Open chemical database providing structures, physical properties, solubility, toxicity summaries and regulatory references for the substances covered in the Hydrionis contaminant and mineral profiles.
Rights
- Commercial reuse
- Yes
- Redistribution
- Yes
- Derivative use
- Yes
- Attribution required
- No
- Restrictions
- Applies to material authored by US federal agencies. Third-party material carried within a federal product may be separately protected.
- Terms last checked
- 23 August 2026
Access and coverage
- Publisher
- National Center for Biotechnology Information
- Geographic coverage
- Not geographic
- Update frequency
- daily
- Formats
- json, csv, api
- Bulk download
- Available
- Registration required
- No
- Rate limit
- 5 requests per second
- Cost to Hydrionis
- Free
- Domains
- chemistry, contaminant