AMMONIA, ANHYDROUS
What is the cas number for AMMONIA, ANHYDROUS?
For AMMONIA, ANHYDROUS, cas number is 7664-41-7; health (blue) is 3; flammability (red) is 1; instability (yellow) is 0; note on the rating is Note: The Refrigeration System Classification section of the International Mechanical Code requires a value of 3 for the red quadrant (flammability hazard) for indoor ammonia refrigeration equipment, verified against its source on 2026-11-10.
Health | 3 | Can cause serious or permanent injury.
— cameochemicals.noaa.gov, retrieved 2026-09-01
- Chemical
- AMMONIA, ANHYDROUS
- CAS number
- 7664-41-7
- Health (blue)
- 3 verified
- Flammability (red)
- 1 verified
- Instability (yellow)
- 0 verified
- Note on the rating
- Note: The Refrigeration System Classification section of the International Mechanical Code requires a value of 3 for the red quadrant (flammability hazard) for indoor ammonia refrigeration equipment. verified
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Health (blue)
Health | 3 | Can cause serious or permanent injury.
Flammability (red)
Flammability | 1 | Must be preheated before ignition can occur.
Instability (yellow)
Instability | 0 | Normally stable, even under fire conditions.
Note on the rating
Note: The Refrigeration System Classification section of the International Mechanical Code requires a value of 3 for the red quadrant (flammability hazard) for indoor ammonia refrigeration equipment.
— all from cameochemicals.noaa.gov, retrieved 2026-09-01
Source
- cameochemicals.noaa.govhttps://cameochemicals.noaa.gov/chemical/4860