NCAR provides Earth system science research resources, including modeling, observational tools, and computing for the research community.
Dataset
Chemical Effects in Biological Systems
Search the CEBS public database for chemical effects in biological systems.
About Chemical Effects in Biological Systems
Chemical Effects in Biological Systems (CEBS) is a public web database of data relevant to environmental health scientists. It is maintained by the NIEHS Division of Translational Toxicology. The data are stored in a relational database that presents results in the context of biology and study design.
The database is intended for cross-study work. According to the homepage, its structure supports data integration, cross-study analysis, knowledge generation and meta-analysis. The site offers guided searches, data collections and additional resources such as a data dictionary and Tox21 data access. Scheduled maintenance can make CEBS Bins unavailable, and the schedule may change. Pricing is not stated.
Key features
- Relational database that presents data in the context of biology and study design
- Guided searches including DNA Damage and HDACI and DDI classification tools
- Treatment-Related Findings and TGx Benchmark Dose Response guided searches
- Integrated High Value Datasets for cross-study analysis
- Tox21 Data Access and In Vivo Repeat Dose Biological Potency Studies resources
- Data Dictionary (DDD) describing the database contents
Best for: Environmental health scientists and toxicology researchers who want to search chemical effects data and combine results across studies.
Good for
- Displays data in the context of biology and study design
- Supports data integration for cross-study analysis and meta-analysis
- Provides a published data dictionary and an updates schedule
Watch out for
- CEBS Bins are unavailable during scheduled maintenance
- The maintenance schedule may be adjusted for holidays or other reasons
Chemical Effects in Biological Systems at a glance
- Official website
- cebs-ext.niehs.nih.gov/cebs
- Category
- Research & Data › Health & Medical Data
- Type
- Dataset
- Platforms
- Web
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Chemical Effects in Biological Systems FAQ
How do I get help accessing CEBS?
The homepage says that access assistance is available by contacting CEBS-support.
When are CEBS Bins unavailable?
The homepage states that CEBS Bin maintenance takes place on the 5th Tuesday of the leap year and that Bins will not be available at that time. The schedule may be adjusted for holidays or other reasons.
Where can I find the CEBS update schedule?
The homepage links to a CEBS Updates and Maintenance Schedule and to CEBS Release Notes.
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