Material Safety Data Sheet for Cyclopentyl Chloride

Identification

Product Name: Cyclopentyl Chloride
Chemical Formula: C5H9Cl
Synonyms: Chlorocyclopentane
CAS Number: 142-18-7
Recommended Use: Laboratory chemical, organic synthesis intermediate
Manufacturer Information: Supplier’s name, address, emergency contact number
Emergency Telephone Number: Provided by manufacturer or local poison control

Hazard Identification

GHS Classification: Flammable liquids–Category 3, Skin Irritation–Category 2, Eye Irritation–Category 2A, Acute toxicity–Category 4
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor. Harmful if inhaled or swallowed. Causes skin and eye irritation. May cause respiratory tract irritation.
Pictograms: Flame, Exclamation mark
Precautionary Statements: Avoid breathing vapors. Keep away from heat and open flame. Wear protective equipment for eyes, skin, face, and respiratory tract. Use only outdoors or in a well-ventilated area.
Other Hazards: Vapors may form explosive mixtures with air. May cause central nervous system depression.

Composition / Information on Ingredients

Chemical Name: Cyclopentyl Chloride
Concentration: 99% or greater
CAS Number: 142-18-7
Impurities: Trace organic compounds as by-products of synthesis, typically less than 1%

First Aid Measures

Inhalation: Move victim to fresh air. Keep at rest in a position comfortable for breathing. Seek immediate medical attention if breathing becomes difficult or symptoms appear.
Skin Contact: Remove contaminated clothing. Rinse skin immediately with plenty of water for 15 minutes. Seek medical advice for persistent irritation.
Eye Contact: Flush eyes with lukewarm, gently flowing water for at least 15 minutes. Remove contact lenses if present and easy to do. Seek prompt medical care.
Ingestion: Rinse mouth with water. Do not induce vomiting. Get medical attention immediately.
Important Symptoms/Effects: Burning sensation, headache, dizziness, nausea, coughing, shortness of breath.
Notes for Physician: Treat symptomatically.

Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical powder, alcohol-resistant foam, carbon dioxide. Water spray may be used to cool unaffected containers.
Unsuitable Extinguishing Media: Direct water jet.
Specific Hazards: Fires may produce toxic fumes such as hydrogen chloride, carbon monoxide, carbon dioxide. Vapors are heavier than air and may travel to ignition sources.
Protective Equipment: Firefighters require self-contained breathing apparatus and full protective clothing.
Fire-Fighting Procedures: Approach from upwind. Keep containers cool with water spray. Prevent runoff from entering drains or water courses.

Accidental Release Measures

Personal Precautions: Avoid inhalation and contact with skin and eyes. Evacuate unnecessary personnel. Ventilate area.
Protective Equipment: Chemical-resistant gloves, goggles, protective clothing, positive-pressure respirator as situation dictates.
Environmental Precautions: Prevent entry into sewers, waterways, basements, or confined areas. Notify environmental authorities if significant quantities enter water or soil.
Spill Clean-up Methods: Contain and absorb spill with inert material (sand, earth, vermiculite), collect in suitable, labeled containers for disposal. Use non-sparking tools, wash spill site after material pick-up.

Handling and Storage

Precautions for Safe Handling: Handle in a well-ventilated area. Avoid inhalation, ingestion, or direct contact with skin or eyes. Utilize grounding and bonding procedures for transfer operations. Do not eat, drink, or smoke where this substance is used.
Storage Conditions: Store in tightly closed containers away from heat, sparks, open flames, and strong oxidizers. Keep in a cool, dry, well-ventilated place. Product should be stored at controlled room temperature, protected from light.
Incompatible Materials: Strong oxidizing agents, bases, acid chlorides, and strong acids.

Exposure Controls and Personal Protection

Control Parameters: No exposure limits assigned by OSHA, ACGIH, NIOSH. Avoid repeated or prolonged exposure.
Engineering Controls: Use local exhaust ventilation or process enclosure. Ensure emergency eyewash stations and safety showers are accessible.
Personal Protective Equipment (PPE): Chemical-resistant gloves (such as nitrile), safety goggles or face shield, lab coat or chemical-resistant apron.
Respiratory Protection: Use organic vapor respirator if ventilation insufficient. For large-scale use or high vapor concentrations, use NIOSH-approved respirators.
Hygiene Measures: Wash hands and exposed skin thoroughly after handling and before eating or drinking.

Physical and Chemical Properties

Appearance: Clear, colorless to pale yellow liquid
Odor: Characteristic, penetrating chloroalkane odor
Odor Threshold: Not determined
pH: Not applicable
Melting Point/Freezing Point: −86 °C
Boiling Point: 104–105 °C
Flash Point: 28 °C (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable liquid
Upper/Lower Flammability Limits: Not determined
Vapor Pressure: 40 mm Hg at 20 °C
Vapor Density: 3.5 (air = 1)
Density/Specific Gravity: 1.005 g/cm³ at 20 °C
Solubility: Insoluble in water; miscible with most organic solvents
Partition Coefficient (n-octanol/water): Not determined
Auto-ignition Temperature: 250 °C
Decomposition Temperature: Not determined
Viscosity: Not determined

Stability and Reactivity

Chemical Stability: Stable under recommended storage conditions.
Reactivity: Reacts with strong oxidizing agents and bases.
Possibility of Hazardous Reactions: May react with acids or bases to produce heat. Vapors may form explosive mixtures with air.
Conditions to Avoid: Heat, flame, sparks, prolonged exposure to light.
Incompatible Materials: Acids, alkalies, oxidizers, amines, and reducing agents.
Hazardous Decomposition Products: Hydrogen chloride, phosgene, carbon monoxide, carbon dioxide.

Toxicological Information

Acute Toxicity: Oral LD50 (rat): about 1000 mg/kg; Inhalation LC50 (rat): not established
Skin Corrosion/Irritation: Causes irritation, redness, dermatitis with extended contact
Eye Damage/Irritation: Risk of conjunctivitis, tearing, redness
Respiratory Sensitization: Inhalation may cause dizziness, headache, irritation
Skin Sensitization: Not known to cause allergic reactions in most users
Chronic Effects: Prolonged exposure may impact liver and kidney function, central nervous system depression.
Other Data: No known carcinogenic, mutagenic, or reproductive effects based on available data.
Target Organs: Eyes, skin, respiratory system, central nervous system

Ecological Information

Ecotoxicity: Harmful to aquatic life; specific LC50/EC50 not widely published, expected to cause moderate toxicity in fish and invertebrates
Persistence/Degradability: Not readily biodegradable; may persist in the environment for weeks to months
Bioaccumulation Potential: Potential to bioaccumulate, especially in aquatic organisms
Mobility in Soil: Expected to have low mobility; binds to organic matter
Other Adverse Effects: Avoid release to the environment; accumulation may affect aquatic life and drinking water sources

Disposal Considerations

Disposal Methods: Incinerate in a chemical incinerator with afterburner and scrubber. Dispose of in accordance with local, regional, and national regulations as hazardous waste.
Contaminated Packaging: Triple rinse containers before disposal or recycling. Dispose of residual liquid as hazardous waste.
Special Precautions: Do not pour down the drain or release to the environment. Consult waste disposal specialists if unsure.

Transport Information

UN Number: UN 1993
UN Proper Shipping Name: Flammable Liquid, N.O.S. (Cyclopentyl Chloride)
Transport Hazard Class: 3 (Flammable Liquids)
Packing Group: III
Labels: Flammable Liquid
Marine Pollutant: Consult local shipping regulations
Special Precautions for Transport: Keep away from heat, sparks, and open flames. Ensure containers are tightly closed. Use approved containers. Follow local regulations for transport of hazardous chemicals.

Regulatory Information

TSCA Status: Listed
EU EINECS/ELINCS: 205-523-1
OSHA, SARA Title III: Subject to reporting under hazardous chemical regulations
DSL/NDSL (Canada): Listed
Other Regulations: Always consult national and local regulations for environmental release, storage, and disposal requirements. Ensure up-to-date employee safety training for hazardous substance handling and emergency response.