Mercury iodide

  • Mercuric iodide
  • Red mecuric iodide
  • Mercury(II) iodide
  • Mercury diiodide
Formula
HgI2
Structure
Description
A scarlet-red odorless tasteless powder. At elevated temperatures turns yellow but turns back to red upon cooling.
Uses
Substance is used in anal.

Registry Numbers and Inventories.
CAS
7774-29-0
EC (EINECS/ELINCS)
231-873-8
EC Index Number
080-002-00-6
EC Class
very toxic, dangerous for the environment
R 26/27/28 33 50/53
S 13 28.1 45 60 61
RTECS
OW5250000
RTECS class
Drug; Reproductive Effector; Human Data
UN (DOT)
1638
Merck
12,5932
Beilstein/Gmelin
37857 (G)
RCRA
D009
EPA OPP
52003
Swiss Giftliste 1
G-9953
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
HgI2
Formula mass
454.4
Melting point, °C
259
Boiling point, °C
354
Vapor pressure, mmHg
100 (256 C)
Vapor density (air=1)
N/R
Odor Threshold Odor threshold Odorless
Density
6.36 g/cm3 (25 C)
Solubility in water
Insoluble
Viscosity
0.02137 cp (227 C)
Thermal expansion
0.00061/K
Heat of fusion
18.63 kJ/mol

Hazards and Protection.
Storage
Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Poison room locked.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Store protected from light.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, chlorine trifluoride, potassium, sodium, light.
Decomposition
Hydrogen iodide, mercury/mercury oxides.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Combustion generates toxic fumes. Extinguishing media: For small fires, use water spray, dry chemical, carbon dioxide or chemical foam.
Fire potential
Non-Combustible
Hazards
Containers may explode when heated. Runoff may pollute waterways.
Combustion products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL: C 0.1 mg/m3 [skin] OSHA PEL: C 0.1 mg/m3 10 mg/m3 (as Hg)
Poison_Class
2
Exposure effects
Chronic inhalation and ingestion may cause effects similar to those of acute inhalation and ingestion. Prolonged or repeated exposure may cause adverse reproductive effects. May cause fetal effects.
   Ingestion
May be fatal if swallowed. Poison by ingestion. May cause kidney damage. May cause severe digestive tract irritation with abdominal pain, nausea, vomiting and diarrhea. May cause corrosion and permanent tissue destruction of the esophagus and digestive tract. Can cause nervous system damage.
   Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. May cause effects similar to those described for ingestion.
   Skin
May cause severe skin irritation. May be absorbed through the skin.
   Eyes
Contact may cause severe eye irritation and possible eye damage.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
1638
Response guide
Hazard class
6.1
Packing Group
II
 
USCG CHRIS Code
MID
 
HS Code
2827 60 00