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Chemical name: Phenylmercuric Hydroxide
Synonyms: Phenylmercury(II) hydroxide
Molecular formula: C6H5HgOH
Appearance: White to off-white crystalline solid
Odor: Odorless
Common uses: Preservative in paints, disinfectant, antifungal agent in industrial and laboratory settings.
Hazard class: Acute toxicity, oral and dermal; Specific target organ toxicity; Hazardous to the aquatic environment
Primary hazards: Highly toxic by skin absorption, inhalation, and ingestion; can cause damage to the kidneys, central nervous system, and immune system; highly dangerous to aquatic life.
Warning symbols: Skull and crossbones, health hazard, aquatic toxicity sign
Potential health effects: Short exposure can bring nausea, vomiting, headache, and nerve issues. Prolonged exposure risks include tremors, personality changes, and permanent organ damage.
Component: Phenylmercuric Hydroxide
Concentration: Typically near 100% for pure sample
CAS Number: 100-56-1
Hazardous impurities: Mercury derivatives or organic solvent residues may occasionally be present based on synthesis method, increasing risk of toxicity.
Skin contact: Remove contaminated clothing, rinse skin immediately with plenty of water for at least 15 minutes, seek medical help without delay.
Eye contact: Rinse eyes slowly and gently with water for at least 15 minutes, keeping eyelids open, consult a physician right away.
Inhalation: Move to fresh air, assist breathing if affected, get prompt medical attention.
Ingestion: Do not induce vomiting, rinse mouth with water, go straight to emergency medical services.
Note: Mercury compounds like this require urgent professional medical intervention; time is critical.
Suitable extinguishing media: Dry chemical powder, carbon dioxide, or alcohol-resistant foam. Water can spread contamination.
Special hazards: Toxic mercury vapors or fumes released during fire; this risk makes breathing protection crucial.
Firefighting advice: Firefighters should use full-body protection, self-contained breathing apparatus, and avoid contaminated runoff reaching water sources.
Precautions: Evacuate area, keep unauthorized personnel away to prevent unnecessary exposure.
Spill containment: Wear chemical-resistant gloves, eye protection, and respirator. Absorb spilled material with damp disposable towels or commercial mercury spill kits, avoid raising dust.
Cleanup: Place waste in secure, labeled containers for hazardous disposal. Ventilate area well and monitor for mercury vapor.
Environmental protection: Stop liquid from entering drains or waterways, report substantial leaks to environmental authorities.
Safe handling: Work in well-ventilated areas, use local exhaust for dust or vapor, keep away from heat or ignition sources, avoid direct contact. Always adhere closely to workplace mercury exposure protocols.
Storage: Keep container tightly closed in a cool, dry, well-ventilated space, far from food and incompatible chemicals. Lock storage areas and restrict access to trained personnel.
Exposure limits: OSHA and ACGIH recommend stringent mercury exposure limits; values often below 0.05 mg/m3 for inorganic mercury compounds.
Engineering controls: Laboratory hoods, local ventilation, and sealed containers help keep vapors and dust minimal.
Personal protection: Use PPE including chemical-resistant gloves, laboratory coats, splash-proof goggles, and appropriate respiratory protection when ventilation is not enough.
State: Solid
Appearance: White crystalline powder
Odor: Odorless
Solubility in water: Slightly soluble
Melting point: Decomposes before melting
Vapor pressure: Essentially none at normal temperatures
Other properties: Decomposes in heat or light, releasing toxic mercury vapors.
Chemical stability: Stable under recommended storage but decomposes at elevated temperatures or in light.
Incompatibilities: Avoid contact with acids, strong oxidizers, and ammonia.
Hazardous decomposition products: Mercury vapor, phenol, and various toxic organic derivatives.
Acute toxicity: Oral and dermal LD50 figures for mercury compounds fall under the “highly toxic” range; even small quantities can produce systemic poisoning.
Chronic health effects: Mercury can accumulate in bodily tissues and inflict permanent neurological or renal damage.
Symptoms of poisoning: Tremors, memory issues, irritability, skin rashes, kidney dysfunction, immune suppression.
Sensitivity: Some individuals show hypersensitivity reactions, including dermatitis and mucous membrane inflammation.
Aquatic toxicity: Extremely hazardous to fish and aquatic invertebrates, bioaccumulates in food chains causing ecological disruption.
Persistence: Mercury does not degrade under normal environmental conditions and can persist for decades.
Risks: Runoff, unsafe disposal, or even minor spills can lead to long-term contamination of soil, groundwater, and waterways.
Disposal methods: Waste requires special hazardous disposal procedures; standard landfill or sewer routes are not permitted.
Incineration: Appropriate only in specialized mercury recovery systems; untreated burning releases highly toxic vapors.
Regulatory compliance: Follow local, regional, and national hazardous waste laws strictly—records and manifest tracking play a role.
Classification: Transported as dangerous goods, subject to mercury compound restrictions
Packaging: Only use tightly sealed, corrosion-resistant, and properly labeled containers
Documentation: Required hazard labeling and emergency response guide information accompany shipments
Special handling: Mitigate accidental spill or breakage with secondary containment measures and immediate notification processes.
Regulation scope: Mercury compounds fall under strict global and country-specific dangerous goods, environmental, and occupational safety rules
Worker safety laws: Exposure monitored routinely by industrial hygiene regulations and strict personal monitoring in the workplace
Environmental standards: Effluent, air emissions, and waste disposal subject to requirements intended to protect both workers and the public from the persistent, cumulative hazards of mercury species in the environment.
