# ISO 80000-9:2019 Quantities and units — Part 9: Physical chemistry and molecular physics

> ISO standard

**Wikidata**: [Q86976044](https://www.wikidata.org/wiki/Q86976044)  
**Source**: https://4ort.xyz/entity/iso-80000-9-2019-quantities-and-units-part-9-physical-chemistry-and-molecular-physics