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; what the rating means is Health | 3 | Can cause serious or permanent injury. | Flammability | 1 | Must be preheated before ignition can occur. | Instability | 0 | Normally stable, even under fire conditions. | Special | | | 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 2026-09-17.
Health | 3 | Can cause serious or permanent injury. | Flammability | 1 | Must be preheated before ignition can occur. | Instability | 0 | Normally stable, even under fire conditions. | Special | | | 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.
— cameochemicals.noaa.gov, retrieved 2026-08-06
- Chemical
- AMMONIA, ANHYDROUS
- CAS number
- 7664-41-7
- Health (blue)
- 3 verified
- Flammability (red)
- 1 verified
- Instability (yellow)
- 0 verified
- What the rating means
- Health | 3 | Can cause serious or permanent injury. | Flammability | 1 | Must be preheated before ignition can occur. | Instability | 0 | Normally stable, even under fire conditions. | Special | | | 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
Source
- cameochemicals.noaa.govhttps://cameochemicals.noaa.gov/chemical/4860