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MERCUROUS CHLORIDEICSC: 0984
Dimercury dichloride
Calomel
Chloromercury
Mercury(I) chloride
November 2019
CAS #: 10112-91-1
UN #: 2025
EC Number: 233-307-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.        In case of fire in the surroundings, use appropriate extinguishing media.   

 STRICT HYGIENE!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Diarrhoea. Vomiting. Metallic taste.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

skull;toxiccancer;health hazenviro;aqua
Toxic if swallowed
Harmful in contact with skin
Causes skin and eye irritation
May cause respiratory irritation
Causes damage to the kidneys and the nervous system through prolonged or repeated exposure
Very toxic to aquatic life with long lasting effects 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 

STORAGE
Separated from food and feedstuffs. Keep in the dark. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 
PACKAGING
Unbreakable packaging.
Put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs.
Severe marine pollutant. 
MERCUROUS CHLORIDE ICSC: 0984
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
WHITE CRYSTALLINE POWDER. 

Physical dangers
No data. 

Chemical dangers
Decomposes slowly under the influence of light. This produces mercuric chloride and mercury. See ICSC 0979, 0056. 

Formula: Cl2Hg2
Molecular mass: 472.09
Sublimation point: 383°C
Density: 7.15 g/cm³
Solubility in water, mg/l at 25°C: 4 (practically insoluble) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. 

Effects of long-term or repeated exposure
The substance may have effects on the central nervous system, peripheral nervous system and kidneys. This may result in ataxia, sensory and memory disturbances, fatigue, muscle weakness and kidney impairment. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: (as Hg): 0.025 mg/m3, as TWA; (skin); A4 (not classifiable as a human carcinogen); BEI issued.
MAK: (as Hg, inhalable fraction): 0.02 mg/m3; peak limitation category: II(8); skin absorption (H); sensitization of skin (SH); carcinogen category: 3B; pregnancy risk group: D 

ENVIRONMENT
The substance is very toxic to aquatic organisms. Bioaccumulation of this chemical may occur in fish. It is strongly advised not to let the chemical enter into the environment because it is persistent. Avoid release to the environment in circumstances different to normal use. 

NOTES
Do NOT take working clothes home.
Depending on the degree of exposure, periodic medical examination is suggested.
Other CAS number: 7546-30-7 . 

ADDITIONAL INFORMATION
  EC Classification
H302; H315; H319; H335; H400; H410 

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