Silver tetraiodomercurate(II)

  • Mercuric silver iodide
  • Mercury(II) silver iodide
  • Mercury disilver tetraiodide
Formula
Ag2HgI4
Structure
Description
Yellow powder.

Registry Numbers and Inventories.
CAS
7784-03-4
EC (EINECS/ELINCS)
232-045-9
R: 26/27/28 33 50/53
S: 13 28 45 60 61
UN (DOT)
2025
Merck
12,8678
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Ag2HgI4
Formula mass
923.94
Solubility in water
Insoluble

Hazards and Protection.
Storage
Keep container tightly sealed. Store in cool, dry conditions in well sealed containers. Store under lock and key and with access restricted to technical experts or their assistants only.
Protection
Protective work clothing. Chemical protective gloves. Safety glasses or goggles.
Incompatibilities
Halogens, reactive metals.

Fire.
Fire fighting
Product is not flammable. Use fire fighting measures that suit the surrounding fire. Wear self-contained respirator. Wear fully protective impervious suit.
Combustion products
Hydrogen iodide, toxic metal oxide fumes.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH PEL: 0.01 mg/m3 (as Ag), 0.1 mg/m3 (as Hg)
Exposure effects
Acute and chronic exposure to inorganic mercury can cause salivation with metallic taste, pain on chewing, gingevitis, colitis, stomatitis, kidney damage, and central nervous system damage. The latter can cause tremors, convulsive or shaking movements and psychic disturbances such as memory loss, insomnia, loss of confidence, irritability and depression. Excessive exposure may result in death. Prolonged exposure to iodides may cause skin rash, running nose, headache and irritation of the mucous membranes. In severe cases the skin may show pimples, boils, redness, black and blue spots, hives and blisters. Iodides are readily diffused across the placenta. Absorption of silver compounds by ingestion, inhalation or through broken skin can cause argyria, a permanent bluish-grey discoloration of the skin, conjuctiva and mucous membranes.

First aid
 
   Ingestion
Do not induce vomiting; immediately call for medical help. Seek immediate medical advice.
   Inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Seek immediate medical advice.
   Skin
Immediately wash with water and soap and rinse thoroughly. Seek immediate medical advice.
   Eyes
Rinse opened eye for several minutes under running water. Then consult a doctor.

Transport.
UN number
2025
Response guide
Hazard class
6.1
Packing Group
III