- Mercury cyanide
- Mercury dicyanide
Odorless tetragonal crystals or white powder.
In germicidal soaps, manufacturing cyanogen gas, in photography.
Registry Numbers and Inventories.
Agricultural Chemical and Pesticide; Human Data
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Decomposition point, °C
Vapor pressure, mmHg
Vapor density (air=1)
Odor Threshold Odor threshold Odorless
Solubility in water
Hazards and Protection.
Store in a cool, dry, well-ventilated area away from incompatible substances. Poison room locked. Keep containers tightly closed. Store protected from light.
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Store protected from light. Avoid mechanical shock and friction.
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 protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
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.
Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stable under normal temperatures and pressures. Friction and impact senstive explosive.
Strong oxidizing agents, acids.
Hydrogen cyanide, nitrogen oxides, carbon monoxide, carbon dioxide, mercury/mercury oxides.
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Nonflammable, but when heated to decomposition, or on contact with acid, it releases flammable toxic hydrogen cyanide.
Contact with metals may evolve flammable hydrogen gas.
Fumes from fire may contain toxic mercury and hydrogen cyanide.
NIOSH REL: C 0.1 mg/m3 [skin] OSHA PEL: C 0.1 mg/m3 10 mg/m3 (as Hg)
Chronic ingestion may cause accumulation of mercury in body tissues. Chronic exposure to mercury compounds may produce immunologic glomerular disease. Chronic exposure to cyanide solutions may lead to the development of a cyanide rash, characterized by itching, and by macular, papular, and vesicular eruptions, and may be accompanied by secondary infections.
May be fatal if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea. Metabolism may release cyanide, which may result in headache, dizziness, weakness, collapse, unconsciousness and possible death. Inorganic mercury compounds may cause central and peripheral nervous system effects.
Causes respiratory tract irritation with possible burns. Acute exposure to high concentrations of mercury vapors may cause severe respiratory tract irritation.
Causes skin irritation and possible burns.
Exposure to mercury or mercury compounds can cause discoloration on the front surface of the lens, which does not interfere with vision. Causes eye irritation and possible burns.
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.
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
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.
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
USCG CHRIS Code
Std. Transport #