Mercury(I) iodide

  • Mercurous iodide
Formula
Hg2I2
Structure
Description
Bright yellow powder. 7.7 g / cm3.
Uses
Medication.

Registry Numbers and Inventories.
CAS
15385-57-6
EC (EINECS/ELINCS)
239-409-6
UN (DOT)
2025
Merck
12,5953
Beilstein/Gmelin
103365 (G)
Austrailia AICS
Listed

Properties.
Formula
Hg2I2
Formula mass
654.98
Melting point, °C
-38.9
Boiling point, °C
356.6
Vapor pressure, mmHg
0.0012
Density
13.6 g/cm3 (20 C)

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers.
Stability
No data.
Incompatibilities
Incompatible with acetylene, ammonia, chlorine dioxide, azides, calcium (amalgam formation), sodium carbide, lithium, rubidium, copper.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide.
Fire potential
Non-Combustible
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
   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
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Chronic oral administration can produce various skin reactions, including erythema nodosum, polymorphic eruptions, urticaria, vasculitis, and petechia.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
2025
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
Std. Transport #
4923247