Mercurous oxide

  • Mercury(i) oxide
Formula
Hg2O
Structure
Description
Black or brownish-black powder. Not a true compound but rather an intimate mixture of metallic mercury and mercuric oxide.

Registry Numbers and Inventories.
CAS
15829-53-5
EC (EINECS/ELINCS)
239-934-0
RTECS
OW8700000
RTECS class
Other
UN (DOT)
1641
Merck
12,5955
Beilstein/Gmelin
33377 (G)
RCRA
D009
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Korea ECL
Listed

Properties.
Formula
Hg2O
Formula mass
417.18
Melting point, °C
-38.9
Boiling point, °C
356.6
Vapor pressure, mmHg
0.0012
Density
13.6 g/cm3 (20 C)
Solubility in water
Insoluble

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
Bureau of mines approved airline respirator; impervious suit; appropriate eye protection.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers.
Stability
No data.
Incompatibilities
Reacts with hydrochloric acid to give insoluble mercurous chloride (calomel) Mixtures with phosphorus or sulfur explode by impact and friction respectively,.

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
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.
Exposure limit(s)
IDHL: 10 mg/m3 (as Hg)
Exposure effects
tremor, confusion, loss of coordination, hyperreflexia, and lethargy may follow acute mercuric chloride ingestion. Chronic exposure can cause fatigue, headache, weakness, decreased concentration, anxiety, emotional lability, irritability and delirium. Mercuric chloride has been associated with spontaneous abortions in humans. It has been embryotoxic, fetotoxic, and teratogenic, and has affected the testes and sperm in rodents.
   Inhalation
Dyspnea, rales, and severe tracheal, laryngeal and pulmonary edema have occurred following ingestion and aspiration of inorganic mercury salts. Clinical findings similar to the adult respiratory distress syndrome (ARDS) have also been reported.
   Skin
Mercury pigmentation, dermatitis and symptoms of acrodynia have resulted from use of creams containing inorganic mercury salts. Burns or irritation can result from some inorganic mercury compounds.
   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
1641
Response guide
Hazard class
6.1
Packing Group
II
 
Std. Transport #
4923251