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Product Name: 1-Chloro-3-Methylbutane
Chemical Formula: C5H11Cl
Synonyms: Isoamyl chloride
CAS Number: 540-54-5
Appearance: Clear, colorless liquid with an irritating odor that can catch the attention right away.
Use Cases: Known for its application in organic synthesis, especially when making pharmaceuticals, fragrances, and specialty chemicals where controlled chlorination of alkanes is needed. Its structure shows up plenty when you’re digging through organic lab coursework.
Main Hazards: Flammable liquid and vapor, toxic if swallowed or inhaled, causes skin and eye irritation, may affect central nervous system at high exposure levels.
Routes of Exposure: Skin contact, eye contact, ingestion, inhalation—all matter because this liquid evaporates quickly and its vapors hang around at room temperature.
Risk Phrases: Harmful if swallowed, can irritate mucous membranes, and inhalation brings risk of drowsiness and headaches.
Personal Experience: Gloves and goggles make a difference—direct skin contact can sting and a single whiff makes the eyes water. Even low-level exposure indoors requires solid ventilation.
Chemical Identity: 1-Chloro-3-Methylbutane
Concentration: Typically over 98% purity in lab stocks.
Impurities: May contain traces of similar haloalkanes or hydrocarbon solvents, but manufacturers usually keep these minimal since contaminants complicate synthesis and increase risk.
Inhalation: Move to fresh air ASAP, loosen tight clothing, watch for respiratory distress—nausea and dizziness typically pass if exposure is brief.
Skin Contact: Remove contaminated clothing and rinse skin with plenty of water—soap helps, but don’t scrub harshly; irritation can persist.
Eye Contact: Rinse thoroughly under running water for at least 15 minutes, lift eyelids as needed—see a physician if irritation hangs on.
Ingestion: Don’t induce vomiting; rinse mouth, drink water if alert, then get medical attention. The toxicity depends on exposure but can be nasty.
Extinguishing Media: Dry chemical, foam, carbon dioxide all work—water spray sometimes helps for cooling exposed drums or containers. Avoid direct water stream that could spread the burning material.
Specific Hazards: Vapors may form explosive mixtures in air, containers can burst in heat. Burning releases corrosive and toxic fumes, including hydrogen chloride and phosgene—everyone remembers the sharp smell and the way smoke can make your throat burn if ventilation fails.
Protective Equipment: Firefighters need self-contained breathing apparatus and full gear; no one wants to risk inhaling toxic combustion products in a smoky lab or warehouse.
Personal Precautions: Evacuate unnecessary people, wear gloves, goggles, and a solvent-resistant apron; if there’s no air circulation, a respirator stops the headache that always follows big spills.
Environmental Precautions: Don’t allow runoff into drains, sewers, or waterways—chlorinated solvents can kill fish and disrupt the local ecosystem.
Spill Cleanup: Absorb spill with inert material like sand or vermiculite, scoop into chemical waste drums for proper disposal. Ventilate area well—even small amounts leave a strong odor and lingering vapors.
Handling: Use in fume hoods, wear appropriate PPE. Anyone who’s ever uncapped a solvent bottle knows how quickly fumes spread, so keep containers closed when not in use.
Storage: Store in tightly sealed containers away from heat, sparks, open flames. Keep out of sunlight, in well-ventilated, cool areas—metal cabinets or solvent safes work best for materials with high vapor pressure.
Incompatibilities: Reacts with strong oxidizers, bases, and some metals—mix-ups happen, so keep it segregated from acids and peroxide-forming chemicals.
Engineering Controls: Fume hoods and mechanical ventilation cut down on inhalation risks—no substitute for decent air movement in any workroom.
Personal Protective Equipment: Chemical-resistant gloves, splash goggles, lab coats, closed shoes make a big difference in routine handling. For large-scale work or spills, organic vapor respirators become necessary.
Work Practices: Wash hands after use, avoid eating or smoking in work areas (the strong odor sticks around on skin and clothes far longer than you’d expect).
Physical State: Liquid
Color: Colorless
Odor: Strong, sharp, somewhat sweetish
Melting Point: Below -100°C
Boiling Point: Around 90–92°C
Density: About 0.86 g/cm³
Vapor Pressure: Noticeable at room temperature; it evaporates on benches not protected by fume hoods.
Solubility: Practically insoluble in water, blends better with solvents like ether, alcohol, benzene—it floats on water, spills spread quickly and leave sheens.
Flash Point: Around 9°C makes storage near sources of ignition risky, so safety-minded labs use spark-proof fridges and remote storage.
Chemical Stability: Stable under normal storage conditions with limited exposure to air; over time, can degrade, especially if exposed to moisture or light.
Reactivity: Incompatible with strong oxidizers (like permanganates, chromates), strong bases, and some metals—chemists keep these separated on different shelf tiers.
Hazardous Decomposition: Releases toxic gases such as hydrogen chloride and phosgene when burned or decomposed—both carry serious respiratory risks, so chemical incidents get close monitoring.
Acute Exposure: Swallowing or breathing in vapors can cause headaches, nausea, dizziness, and CNS depression. Skin contact brings redness and discomfort; repeated exposure leaves skin dry or cracked.
Chronic Exposure: No strong evidence for carcinogenicity, but long-term inhalation at high concentrations, especially in closed rooms, seems to impact liver and kidney function among chemical handlers.
Personal Note: PPE and ventilation eliminate most of the acute problems—anyone who’s worked around solvents remembers days with poor ventilation and the headaches that followed.
Environmental Impact: Toxic to aquatic life, persistent in water and soil. Not easily broken down by common bacteria, so chemical waste disposal becomes an environmental responsibility.
Aquatic Toxicity: Fish and aquatic invertebrates show strong negative responses—even small leaks into local waters can disrupt nearby ecosystems. Labs and warehouses with chemical storage set up secondary containment bunds for just this reason.
Mobility: Floats on water, evaporates quickly but the vapor can travel and settle anew—monitoring required near surface water and drains.
Waste Management: Incineration at facilities licensed for halogenated wastes works best—never pour down drains or mix with general refuse. Collect all contaminated cleanup materials for hazardous waste disposal.
Reuse/Recycling: Once contaminated, difficult to recycle for standard uses. Waste minimization comes from smart purchasing, inventory controls, and limiting open containers.
Legal Restrictions: Labs and factories follow local and national hazardous waste rules—enforcement gets stricter as environmental awareness rises and local governments check permits more often.
UN Number: 2357 for road, sea, and air transport
Transport Hazard Class: Flammable liquid
Packing Group: III (moderate hazard).
Labeling: Use flammable liquid warning labels—trucks and courier services require strict paperwork and bulk shipments move in approved drums.
Precautions: Anyone shipping chemicals needs to prevent leaks, use secondary containment, and double-check storage stability for transit during all seasons.
National Inventories: Registered under global chemical inventories, including those in North America, Europe, and parts of Asia, subject to reporting and safe handling standards.
Hazard Labelling: Required GHS hazard statements, pictograms for flammability and acute toxicity including flame and exclamation mark symbols.
Occupational Limits: No established OSHA or NIOSH exposure limits for 1-chloro-3-methylbutane itself, but users observe solvent exposure standards from similar chloroalkanes.
Regulatory Context: As more regulations require tracking, anyone using or importing this chemical gets used to paperwork, periodic safety audits, and training refreshers.
