Chemical of the Week Part 2 - Anhydrous Ammonia

Hazard Profile

Chemical Name and Pseudonyms

Ammonia

UN Number

1005

Chemical Formula

NH₃

Primary Hazards

Flammable, skin/eye irritant, respiratory irritant,  toxic by inhalation, chemical burns

PPE Considerations

Vapor protective garment or multi-threat garment with SCBA

Fire Fighting Considerations

Water, extinguishing agent suitable for surrounding combustible materials

Decontamination

Copious water if on skin or eyes (flush until arrival at hospital), water forms caustic solution which will continue to burn if ammonia is not complete removed, soap and water or ventilation for garment and equipment

Detection and Monitoring

Electro-chemical sensor, colormetric, IP = 10.18 eV

Chemical and Physical Properties

Physical State

Colorless gas with strong odor

Vapor Pressure

8.5 ATM

Boiling Point

~-33^oF

Vapor Density

.6

Specific Gravity

N/A

Miscibility

Soluble in water, forming a caustic solution 

Flash Point

N/A

LEL/UEL

~15-28%

Auto Ignition Temperature

1203^oF

Flash Point

N/A

Routes of Exposure

Inhalation, absorption, ingestion, contact,

IDLH

500 ppm

PEL/REL/STEL

50/25/35 ppm

pH

Approximately 11 when in solution

Radioactive (Yes/No)

No

Medical

Toxicological Considerations

Avoid contact, forms caustic solutions, soluble in water

Signs/Symptoms of Exposure

Irritation of skin, respiratory tract, eyes, chemical burns, frostbite

Medical Treatment

Fresh air, flush, supportive care

Other Information

Incompatible with strong acids, oxidizers, and halogens

Chemical Structure