Ammonia in the NIOSH Pocket Guide (source code)

= Ammonia in the NIOSH Pocket Guide
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Institutional chemical data from the National Institute for Occupational Safety and Health. Inspected fields: Physical Description, Molecular Weight, Solubility and Symptoms. Modern hazard and physical-property corroboration, not an 1866 exposure standard.

https://www.cdc.gov/niosh/npg/npgd0028.html