International Association for the Properties of Water and Steam
IAPWS formulations for the properties of water
The internationally agreed formulations for the thermodynamic and transport properties of ordinary water substance, including IAPWS-95 and IAPWS-IF97, which define the reference values used across science and engineering.
Rights
- Licence
- Publisher terms — public access, reuse not clearly granted
- Commercial reuse
- Not clearly stated
- Redistribution
- No
- Derivative use
- Not clearly stated
- Attribution required
- YesData from International Association for the Properties of Water and Steam, used under Publisher terms — public access, reuse not clearly granted.
- Restrictions
- Freely viewable, but the publisher does not state an open reuse licence. Hydrionis cites and links rather than redistributing.
- Terms last checked
- 23 August 2026
Access and coverage
- Publisher
- International Association for the Properties of Water and Steam
- Website
- http://www.iapws.org/
- Geographic coverage
- Not geographic — physical constants
- Update frequency
- irregular
- Formats
- Bulk download
- Available
- Registration required
- No
- Cost to Hydrionis
- Free
- Domains
- chemistry