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Chemical Name: 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine Hydrochloride
Common Synonyms: MPTP, MPTP HCl
Molecular Formula: C12H15N·HCl
Appearance: White or off-white crystalline powder, bitter odor hints
Common Uses: Research tool in neuroscience and neurotoxicity, especially studies modeling Parkinson’s disease
Acute Hazards: High neurotoxicity, risk of causing severe and irreversible central nervous system damage if inhaled, swallowed, or absorbed through skin
Primary Health Concerns: Extreme risk of parkinsonism upon exposure, documented lethality to dopaminergic neurons
Routes of Exposure: Eye contact, skin contact, ingestion, inhalation all carry significant risk
Exposure Symptoms: Stiffness, tremors, behavioral changes, breathing issues—effects can mimic advanced Parkinson's disease in humans
Main Ingredient: 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine in hydrochloride form
Chemical Purity: Generally over 97% in research-grade samples
Impurities: Often not specified, but research chemicals tend to contain trace organic contaminants from synthesis
Physical State: Crystalline solid, hygroscopic tendencies require attention during handling
Inhalation: Move affected person into fresh air; immediate medical attention required. Administer oxygen if breathing becomes difficult.
Skin Contact: Remove contaminated clothing and rinse skin with plenty of water for at least 15 minutes. Seek medical help promptly.
Eye Contact: Rinse eyes cautiously with water for at least 15 minutes, lifting eyelids. Call an ophthalmologist right away.
Ingestion: Rinse mouth thoroughly with water but do not induce vomiting. Ensure medical evaluation and treatment.
Suitable Extinguishing Media: Dry chemical, CO2, alcohol-resistant foam
Hazardous Products of Combustion: Toxic gases such as nitrogen oxides, hydrochloric acid fumes, and possibly carbon monoxide
Protective Equipment: Self-contained breathing apparatus, protective suit suggested
General Approach: Avoid inhalation of smoke; keep material away from open flames and hot surfaces
Personal Precautions: Wear chemical-resistant gloves, splash goggles, and use adequate ventilation, preferably in a fume hood
Environmental Precautions: Prevent contamination of drains, water courses, and soil
Cleanup Methods: Scoop up spills carefully without raising dust, transfer to a sealed, labeled chemical waste container for safe disposal
Decontamination: Wash any residue away with large amounts of water and appropriate laboratory detergent
Safe Handling Practices: Always use closed systems or gloveboxes for weighing and transferring. Avoid skin and eye contact, as well as inhaling any dust or smoke.
Storage Conditions: Store tightly sealed at low temperatures, away from sources of heat and oxidants. Dedicated and access-restricted chemical cabinetry is preferred.
Daily Laboratory Routine: Label containers clearly; restrict access and train personnel specifically about the extremely high neurotoxic risks.
Engineering Controls: Work only in certified chemical fume hoods or gloveboxes. Maintain negative pressure in the handling area.
Personal Protective Equipment: Lab coat, impervious gloves (nitrile, butyl), safety goggles or face shield, respiratory protection (if risk of dust/vapor exposure exists)
Hygiene Measures: Wash hands thoroughly after handling, no eating or drinking in laboratories; immediate removal of contaminated clothing recommended.
Physical State: Fine crystalline powder, typically white to pale cream
Odor: Faintly aromatic
Melting Point: Reported near 160–165 °C for hydrochloride salt
Solubility: Freely soluble in water and organic solvents like ethanol and DMSO
Stability in Air: May degrade slowly with moisture or light exposure; handle shields against air and ambient humidity
Chemical Stability: This compound can break down in the open, especially with exposure to light, heat or strong acids/bases
Reactive Hazards: Strong oxidizers or reducing agents can cause unwanted reactions. Always use inert atmosphere for bulk handling.
Hazardous Decomposition: Possibility of liberation of toxic nitrogen oxides and hydrochloric acid in event of fire or hot decomposition
Acute Toxicity: Documented neurotoxin in animal models, irreversible dopaminergic neuron death even at microgram/kg quantities
Chronic Toxicity: Long-term effects include persistent parkinsonism and motor disorders. Unintentional trace exposure has ended research careers.
Routes of Entry: Absorption through skin, inhalation of powder, or accidental ingestion can each precipitate rapid onset neurodegeneration.
Symptoms: Initially mild flu-like feeling, followed by joint rigidity, bradykinesia, cognitive and personality shifts
Environmental Risks: Toxic to aquatic organisms; can cause long-term changes in aquatic behavioral ecology
Mobility in Soil: No specific data, though water solubility suggests moderate mobility and groundwater risk
Persistence: Structurally stable in cool, dark, aqueous environments; environmental breakdown is slow
Avoiding Exposure: Treat as an environmental toxicant; use all waste control mechanisms to restrict release from labs
Waste Handling: Collect hazardous chemical waste in sealed, signed secondary containers
Chemical Incineration: Only professional and permitted hazardous waste incinerators should process this type of waste
Local Regulation: All disposal must meet strict hazardous chemical and neurotoxin protocols as per national and regional chemical safety offices
Shipping Restrictions: Require triple packaging, clear neurotoxin hazard labeling
Mode of Transit: Ground and air shipment under approved licensed carriers capable of handling hazardous substances
Accident Protocol: All shippers must train on emergency leak/spill kits and wear full PPE
Legal Controls: Subject to neurotoxin and chemical research licensing, restricted for use by trained professionals only
Workplace Regulations: Laboratories using this compound face stringent inspection requirements, including SOPS and incident reporting
International Restrictions: Considered a schedule-controlled substance in various jurisdictions, strict import/export licensing demanded
