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Hazardous Substance Fact Sheet Right to Know Hazardous Substance Fact Sheet Common Name: MERCURIC CYANIDE Synonyms: Dicyanomercury CAS Number: 592-04-1 Chemical Name: Mercury Cyanide (Hg(CN)2) RTK Substance Number: 1171 Date: February 2000 Revision: May 2009 DOT Number: UN 1636 Description and Use EMERGENCY RESPONDERS >>>> SEE LAST PAGE Mercuric Cyanide is an odorless, clear, or white, crystalline Hazard Summary (sand-like) powder. It is used in germicidal soaps, Hazard Rating NJDOH NFPA photography, and making Cyanogen gas. HEALTH - 3 FLAMMABILITY - 0 REACTIVITY 1 0 POISONOUS GASES ARE PRODUCED IN FIRE Reasons for Citation Hazard Rating Key: 0=minimal; 1=slight; 2=moderate; 3=serious; f Mercuric Cyanide is on the Right to Know Hazardous 4=severe Substance List because it is cited by OSHA, ACGIH, DOT, f Mercuric Cyanide can affect you when inhaled and may be NIOSH, DEP, NFPA and EPA. absorbed through the skin. f Contact can irritate and burn the skin and eyes with possible eye damage. f Inhaling Mercuric Cyanide can irritate the nose, throat and lungs. f Exposure can cause metallic taste in the mouth, nausea, SEE GLOSSARY ON PAGE 5. vomiting and abdominal pain. f Mercuric Cyanide may cause a skin allergy and make the FIRST AID skin turn gray. f Repeated exposure can cause Mercury poisoning with Eye Contact tremors, personality changes, trouble remembering and f Immediately flush with large amounts of water for at least 15 concentrating, and gum problems. minutes, lifting upper and lower lids. Remove contact f Mercuric Cyanide may damage the kidneys. lenses, if worn, while flushing. Seek medical attention. f If Mercuric Cyanide is involved in a fire it can release Hydrogen Cyanide gas. Consult the Right to Know Skin Contact Hazardous Substance Fact Sheet on HYDROGEN f Quickly remove contaminated clothing. Immediately wash CYANIDE. contaminated skin with large amounts of soap and water. Inhalation Workplace Exposure Limits f Remove the person from exposure. OSHA: The legal airborne permissible exposure limit (PEL) is 3 f Begin rescue breathing (using universal precautions) if 0.1 mg/m , not to be exceeded at any time. breathing has stopped and CPR if heart action has stopped. f Transfer promptly to a medical facility. NIOSH: The recommended airborne exposure limit (REL) is 0.05 mg/m3 (as Mercury vapor) averaged over a 10-hour f Use Amyl Nitrite capsules if symptoms develop. All area 3 workshift and 0.1 mg/m (as Mercury), not to be exceeded at employees should be trained regularly in emergency any time. treatment of Cyanide poisoning and in CPR. A Cyanide antidote kit MUST be rapidly available and ingredients ACGIH: The threshold limit value (TLV) is 0.025 mg/m3 (as Mercury) replaced every 1 to 2 years to ensure freshness. averaged over an 8-hour workshift. The following exposure limits are for Hydrogen Cyanide: EMERGENCY NUMBERS OSHA: The legal airborne permissible exposure limit (PEL) is Poison Control: 1-800-222-1222 11 mg/m3 (10 ppm) averaged over an 8-hour workshift. CHEMTREC: 1-800-424-9300 NIOSH: The recommended airborne exposure limit (REL) is NJDEP Hotline: 1-877-927-6337 3 5 mg/m (4.7 ppm), which should not be exceeded during National Response Center: 1-800-424-8802 any 15-minute work period. 3 ACGIH: The threshold limit value (TLV) is 5 mg/m (4.7 ppm), which should not be exceeded at any time. f The above exposure limits are for air levels only. When skin contact also occurs, you may be overexposed, even though air levels are less than the limits listed above. MERCURIC CYANIDE Page 2 of 6 Determining Your Exposure Reproductive Hazard f While Mercuric Cyanide has not been tested for its ability to f Read the product manufacturer’s Material Safety Data affect reproduction, it should be HANDLED WITH CAUTION Sheet (MSDS) and the label to determine product since several related Mercury compounds have caused ingredients and important safety and health information reproductive damage. about the product mixture. Other Effects f For each individual hazardous ingredient, read the New f Mercuric Cyanide may cause a skin allergy. If allergy Jersey Department of Health Hazardous Substance Fact develops, very low future exposure can cause itching and a Sheet, available on the RTK website skin rash. (www.nj.gov/health/eoh/rtkweb) or in your facility’s RTK f Repeated contact can cause the skin to turn gray, brown Central File or Hazard Communication Standard file. staining in the eyes, and may affect peripheral vision (ability to see to the sides). f You have a right to this information under the New Jersey f Repeated exposure or a very high single exposure can Worker and Community Right to Know Act, the Public cause Mercury poisoning. Symptoms include tremors Employees Occupational Safety and Health (PEOSH) Act (shaking), trouble remembering and concentrating, gum if you are a public worker in New Jersey, and under the problems, increased salivation, loss of appetite and weight, federal Occupational Safety and Health Act (OSHA) if you and changes in mood and personality. These can be severe are a private worker. and cause hallucinating and psychosis. f Mercuric Cyanide may damage the kidneys. f The New Jersey Right to Know Act requires most employers to label chemicals in the workplace and requires public employers to provide their employees with Medical information concerning chemical hazards and controls. The federal OSHA Hazard Communication Standard (29 Medical Testing CFR 1910.1200) and the PEOSH Hazard Communication For frequent or potentially high exposure (half the TLV or greater), the following are recommended before beginning Standard (N.J.A.C. 12:100-7) require employers to provide work and at regular times after that: similar information and training to their employees. f Exam of the nervous system (including handwriting test to This Fact Sheet is a summary of available information detect early hand tremor) regarding the health hazards that may result from exposure. f Urine Mercury level (usually less than 0.02 mg/liter) Duration of exposure, concentration of the substance and other f Kidney function tests factors will affect your susceptibility to any of the potential effects described below. If symptoms develop or overexposure is suspected, the following are recommended: Health Hazard Information f Exam of the eyes and vision f Evaluation by a qualified allergist can help diagnose skin Acute Health Effects allergy. The following acute (short-term) health effects may occur f Consider neurobehavioral, nerve conduction and urinary immediately or shortly after exposure to Mercuric Cyanide: enzyme testing f Contact can irritate and burn the skin and eyes with possible Any evaluation should include a careful history of past and eye damage. present symptoms with an exam. Medical tests that look for f Inhaling Mercuric Cyanide can irritate the nose, throat and damage already done are not a substitute for controlling lungs causing coughing, wheezing and/or shortness of exposure. breath. f Exposure can cause metallic taste in the mouth, nausea, Request copies of your medical testing. You have a legal right vomiting and abdominal pain. to this information under the OSHA Access to Employee Exposure and Medical Records Standard (29 CFR 1910.1020). Chronic Health Effects The following chronic (long-term) health effects can occur at Mixed Exposures some time after exposure to Mercuric Cyanide and can last f Creams to whiten or bleach skin may contain Mercury. If for months or years: you use them, you may be at increased risk of Mercury poisoning. A high fish diet, especially of marine predatory Cancer Hazard fish (fish-eating fish), also may increase your blood Mercury f There is no evidence that Mercuric Cyanide causes cancer levels. in animals. This is based on test results presently available to the NJDOH from published studies. MERCURIC CYANIDE Page 3 of 6 Workplace Controls and Practices f All protective clothing (suits, gloves, footwear, headgear) should be clean, available each day, and put on before work. Very toxic chemicals, or those that are reproductive hazards or sensitizers, require expert advice on control measures if a less toxic chemical cannot be substituted. Control measures Eye Protection include: (1) enclosing chemical processes for severely f Wear eye protection with side shields or goggles. irritating and corrosive chemicals, (2) using local exhaust f If additional protection is needed for the entire face, use in ventilation for chemicals that may be harmful with a single combination with a face shield. A face shield should not be exposure, and (3) using general ventilation to control used without another type of eye protection. exposures to skin and eye irritants. For further information on workplace controls, consult the NIOSH document on Control Respiratory Protection Banding at www.cdc.gov/niosh/topics/ctrlbanding/. Improper use of respirators is dangerous. Respirators should only be used if the employer has implemented a written The following work practices are also recommended: program that takes into account workplace conditions, requirements for worker training, respirator fit testing, and f Label process containers. medical exams, as described in the OSHA Respiratory f Provide employees with hazard information and training. f Monitor airborne chemical concentrations. Protection Standard (29 CFR 1910.134). f Use engineering controls if concentrations exceed recommended exposure levels. f Where the potential exists for exposure over 0.05 mg/m3 (as 3 3 f Provide eye wash fountains and emergency showers. Mercury vapor), or over 0.1 mg/m but less than 1 mg/m f Wash or shower if skin comes in contact with a hazardous (as Mercury), use a NIOSH approved half-mask respirator material. with cartridges specific for Mercury vapor. These cartridges f Always wash at the end of the workshift. have end of service life indicators (ESLI) which visually f Change into clean clothing if clothing becomes indicate when filters must be changed.
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