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Product name: Mercuric Arsenate
Chemical formula: Hg3(AsO4)2
Synonyms: Mercury arsenate
CAS Number: 10112-76-6
Recommended use: Laboratory research, analytical reagent
Supplier: Refer to the source of the chemical
Emergency contact: Reach out to national poison centers or emergency response numbers listed on your country’s regulatory board
Classification: Acute Toxicity (Oral, Inhalation, Dermal), Carcinogenicity, Reproductive toxicity, Specific target organ toxicity (repeated exposure), Hazardous to the aquatic environment
Signal word: Danger
Hazard statements: Fatal if swallowed, inhaled, or in contact with skin. May cause cancer. Causes damage to organs through prolonged or repeated exposure. Very toxic to aquatic life with long-lasting effects.
Precautionary statements: Avoid all exposure. Personal protective equipment (PPE) is essential. Avoid release to the environment. Obtain special instructions before use.
Chemical identity: Mercuric Arsenate
Percentage: 98–100% Mercuric arsenate
Impurities: Contains trace levels of other mercury and arsenate compounds which may contribute to overall toxicity
Inhalation: Remove individual to fresh air. Give oxygen if breathing is difficult. Seek medical attention without delay.
Skin contact: Remove contaminated clothing and rinse skin with plenty of water for at least 15 minutes. Seek immediate medical help.
Eye contact: Rinse eyes thoroughly with water for at least 15 minutes, keeping lids open. Seek medical assistance immediately.
Ingestion: Do not induce vomiting. Rinse mouth with water. Seek urgent medical care. If unconscious, do not give anything by mouth.
Suitable extinguishing media: Use dry chemical powder, foam, or carbon dioxide. Water may spread contamination.
Special hazards: Mercury vapor, arsenic oxides, and highly toxic fumes form during fire. These can cause severe poisoning.
Protective equipment: Firefighters should wear self-contained breathing apparatus and full protective suit. Do not allow runoff from firefighting to drain into water systems.
Personal precautions: Evacuate area, ventilate space, use personal protective equipment including respiratory protection.
Environmental precautions: Prevent entry into sewers, waterways, or soil. Use containment diking for spilled material.
Cleanup: Use spark-free tools to collect spilled material and transfer to secure containers. Dispose through licensed hazardous waste disposal contractors. Decontaminate area thoroughly.
Precautions for safe handling: Avoid inhalation, ingestion, and skin or eye contact. Handle within chemical fume hoods. Maintain excellent hygiene practices. Always use PPE: gloves, goggles, lab coats.
Storage conditions: Store in tightly closed containers, in a cool, well-ventilated, marked area away from incompatible materials like strong acids, bases, and reducing agents. Access restricted to trained personnel. Never store near food or water sources. Clearly label storage location for emergency responders.
Occupational exposure limits: Mercury (as Hg) TWA 0.025 mg/m³ (ACGIH); Arsenic (as As) TWA 0.01 mg/m³ (OSHA/NIOSH).
Engineering controls: Use chemical fume hoods or equivalent engineering measures. Safety showers and eyewash stations should be near work area.
Personal protection: Respirators with appropriate filters for mercury and arsenic dusts, chemical resistant gloves (nitrile, neoprene), full eye and face protection, disposable protective clothing. Do not eat, drink, or smoke during use.
Appearance: White or pale yellow crystalline powder
Odor: Odorless
Odor threshold: Not applicable
pH: Not applicable
Melting point: Decomposes before melting
Boiling point: Not applicable
Flash point: Not flammable
Vapor pressure: Not available
Solubility: Slightly soluble in water; more soluble in acids
Density: 6.72 g/cm³
Partition coefficient: Not available
Auto-ignition temperature: Does not auto-ignite
Decomposition temperature: Decomposes at high temperatures, releasing toxic gases
Viscosity: Not applicable
Chemical stability: Stable under standard conditions and recommended storage. Heat, light, moisture increase risk of decomposition.
Incompatible materials: Strong acids, bases, reducing agents, ammonia, active metals.
Hazardous decomposition products: Mercury fumes, arsenic oxides, toxic heavy metal compounds.
Conditions to avoid: High temperatures, open flame, incompatible material contact. Contamination risks can escalate during removal and handling.
Mercuric arsenate toxicity: Both mercury and arsenic are potent systemic poisons. Symptoms of acute exposure include severe headache, abdominal pain, nausea and vomiting, diarrhea, renal and hepatic failure, neurological impairment, skin eruptions.
Chronic effects: Sensory and motor neuropathy, kidney and liver damage, bone marrow suppression, carcinogenicity, reproductive effects, cross-placental transfer, developmental toxicity.
Routes of exposure: Ingestion, inhalation, dermal absorption. Skin contact can cause irritation and ulceration.
Carcinogenicity: Classified by the International Agency for Research on Cancer (IARC) and U.S. National Toxicology Program (NTP) as carcinogenic to humans.
Mutagenicity: Evidence of genetic damage has surfaced in laboratory studies due to both mercury and arsenic content.
Ecotoxicity: Highly toxic to aquatic and terrestrial organisms. Persistence in soil and water, bioaccumulation in food chains, risk to avian, aquatic, and mammalian species.
Mobility: Limited in soil, but breaks down to mobile mercury and arsenic ions, which can contaminate groundwater and surface water.
Degradability: Not readily biodegradable. Mercury and arsenic persist in the environment, causing long-term damage.
Bioaccumulation: Persistent bioaccumulative toxicant (PBT). Both elements reach higher trophic levels, resulting in biomagnification in birds, mammals, and humans.
Further impact: Disrupts natural microbial activity and plant development in contaminated zones.
Waste treatment methods: Refer waste to hazardous waste disposal contractors. Incineration must be performed only at facilities equipped with air pollution control to minimize emissions. Avoid landfill disposal except as permitted by regulators.
Contaminated containers: Treat as hazardous waste. Do not reuse. Rinse thoroughly with appropriate neutralizing agents, then dispose of rinse water as hazardous liquid waste.
Precautions: Comply fully with local, regional, national, and international disposal regulations. Prevent environmental release.
UN number: 1649
UN proper shipping name: Mercury compound, n.o.s. (Mercuric arsenate)
Transport hazard class: 6.1 – Toxic substances
Packing group: II
Hazard labels: Toxic
Environmental hazards: Marine pollutant
Special precautions: Use certified containers, clear hazard labeling, shipping and storage records. Ensure transport personnel receive hazard training and emergency action information.
Inventory status: Subject to regulations under major chemical inventories worldwide (TSCA, REACH, EINECS).
Workplace regulations: OSHA, ACGIH, NIOSH, EPA, and state/provincial agencies define exposure limits and reporting guidelines for mercury, arsenic, and their compounds.
Carcinogen listings: Listed by IARC, NTP, and other regulatory bodies due to proven human carcinogenicity.
Environmental protection: Strictly regulated discharge and emission controls. Inspections required to ensure compliance with hazardous substances laws.
Additional requirements: Comprehensive safety and hazard training for users, written safety plans required for workplaces handling this compound. Labeling and safety documentation must align with local, national, and international hazardous materials standards.
