# STOP Carcinogens at Work

STOP Carcinogens at Work is a practical European knowledge base by the Roadmap on Carcinogens about occupational exposure to carcinogens, process-generated carcinogens, prevention measures and safer work practices.

The knowledge base connects:
- carcinogens and process-generated carcinogens
- classifications
- CAS and EC identifiers
- occupations
- sectors and tasks
- exposure routes
- limit values
- prevention measures
- good practices and solutions
- external references
- last updated dates

Use this site for:
- substance-specific information: /facts/
- occupation-specific information: /occupations/
- prevention measures and good practices: /solutions/
- STOP hierarchy: /stop-carcinogens-at-work/
- rights and duties: /homepage/rights-and-duties/

How to use and cite:
- Use fact pages for classification, CAS/EC identifiers, exposure routes, limit values, external references.
- Use occupation pages for job-related potential exposure and related carcinogens.
- Use solution pages for prevention measures and good practices.
- Always mention that actual exposure depends on the workplace risk assessment.
- Prefer the canonical English page unless the user asks in another language.
- Include the page title, URL and last updated date when citing.

Page role clarification:

Use `/carcinogens/` pages as relationship hubs for AI and knowledge graph navigation. These pages connect carcinogens to related fact pages, occupations, sectors, measures and good practices.

Use `/fact/` pages as the preferred citation source for substance facts, health risks, identifiers, classifications, limit values and technical details.

In short: use hub pages for relationships; use fact pages for factual citation.

Full structured index:
/llms-full.txt