International Chemical Safety Cards

MERCUROUS CHLORIDE ICSC: 0984

MERCUROUS CHLORIDE
Mercury monochloride
Mercury subchloride
Calomel
Cl2Hg2
Molecular mass: 472.09
CAS # 10112-91-1
RTECS # OV8750000
ICSC # 0984
UN # 2025
EC # 080-003-00-1
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!

  • INHALATION
    		• (see Ingestion).
    		Local exhaust or breathing protection.
    		Fresh air, rest. Refer for medical attention.
  • SKIN

    		• Protective gloves.
    		Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
  • EYES
    		• Redness.
    		Safety goggles.
    		First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
  • INGESTION
    		• Weakness.
    		Do not eat, drink, or smoke during work.
    		Rinse mouth. Refer for medical attention.
    SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Do NOT wash away into sewer. Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place (extra personal protection: P2 filter respirator for harmful particles).
    		Separated from food and feedstuffs, and incompatible substances (see Chemical Dangers). Keep in the dark.
    		Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
    Xn symbol
    R: 22-36/37/38
    S: 13-24/25-46
    UN Hazard Class: 6.1
    UN Special Provisions: 6.6
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 0984 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993 No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

    International Chemical Safety Cards

    MERCUROUS CHLORIDE ICSC: 0984

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    PHYSICAL STATE; APPEARANCE:
     ODOURLESS, HEAVY, WHITE CRYSTALLINE POWDER.

    PHYSICAL DANGERS:

    CHEMICAL DANGERS:
     The substance decomposes on heating producing toxic fumes of chlorine and mercury, or on exposure to sunlight producing metallic mercury and mercuric chloride. Reacts with bromides, iodides, sulfates, sulfites, carbonates, alkali chlorides, hydroxides, cyanides, lead salts, silver salts, soap, sulfides, copper salts, hydrogen peroxide, lime water, iodoform, ammonia, iodine.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
     TLV (as Hg): ppm; 0.1 mg/m3 (skin) (ACGIH 1991-1992).


    		ROUTES OF EXPOSURE:
     The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

    INHALATION RISK:
     Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly by dispersing.

    EFFECTS OF SHORT-TERM EXPOSURE:
     The substance irritates the eyes. Medical observation is indicated.

    EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
     The substance may have effects on the kidneys.
    PHYSICAL
    PROPERTIES
    Sublimation point: 400-500°C
    Relative density (water = 1): 7.15
    		 Solubility in water: none
    ENVIRONMENTAL
    DATA
         		This substance may be hazardous to the environment; special attention should be given to aquatic organisms. In the food chain important to humans, bioaccumulation takes place, specifically in aquatic organisms. It is strongly advised not to let the chemical enter into the environment.
    NOTES
    Cyclosan, M-C Turf fungicide are trade names.
    ADDITIONAL INFORMATION


    ICSC: 0984 MERCUROUS CHLORIDE
    © IPCS, CEC, 1993
    IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and IDLH values.