Ammonium iodide

Formula
NH4I
Structure
Description
Odorless white solid. Turns yellow-brown on exposure to light and air.
Uses
In photographic chemicals.

Registry Numbers and Inventories.
CAS
12027-06-4
EC (EINECS/ELINCS)
234-717-7
R 36/37/38
Merck
13,531
Beilstein/Gmelin
12984 (G)
Swiss Giftliste 1
G-1111
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H4IN
Formula mass
144.94
Melting point, °C
551
Vapor pressure, mmHg
0.003 (112 C)
Density
2.51 g/cm3
Solubility in water
1670 g/L

Hazards and Protection.
Storage
Keep tightly closed and protected from light.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Dust mask; goggles or face shield; rubber gloves.
Respirators
Use NIOSH/MSA approved dust mask for ordinary use. SCBA for emergency use.
Small spills/leaks
Wear full protective equipment. Cover with dry sand or vermiculite. Mix well and carefully transfer to a container for subsequent disposal.
Stability
Becomes yellow to brown on exposure to air and light except in presence of stabilizer, such as ammonium hypophosphite, aqueous solution will quickly become yellow.
Incompatibilities
Strong oxidizing agents.
Decomposition
When heated to decomposition, emits very toxic fumes of hydrogen iodide, ammonia and nitrogen oxides.

Fire.
Flash Point,°C
405
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
Hazards
Toxic and irritating fumes of hydrogen iodide, iodine, and oxides of nitrogen may form in fire. Behavior in Fire: Compound may sublime in fire and condense on cold surfaces.
Combustion products
Toxic and irritating fumes of hydrogen iodide, iodine, and oxides of nitrogen may form in fire.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
3
Exposure effects
Cretinism and goiter have been reported in children whose mothers were taking iodides.
   Ingestion
Acute ingestion of iodide salts does not result in corrosive actions on the gastrointestinal tract. Vomiting and abdominal pain may be noted but are not as common as with acute iodine ingestion.
   Inhalation
Inhalation causes irritation of nose and throat. Contact with eyes causes irritation.
   Skin
Chronic oral administration can produce various skin reactions, including erythema nodosum, polymorphic eruptions, urticaria, vasculitis, and petechia.
   Eyes
A metallic taste, increased salivary and bronchial secretions may be noted.

First aid
 
   Ingestion
If significant amount has been ingested, get medical attention.
   Inhalation
Remove to fresh air.
   Skin
Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   Eyes
Flush with water.

Transport.
USCG CHRIS Code
AID