Xylene
 Xylene is a clear, colorless, flammable aromatic hydrocarbon solvent consisting of three isomers: ortho-, meta-, and para-xylene. It is widely utilized in various industries for its excellent solvency, chemical stability, and moderate evaporation rate. Xylene serves as a key raw material in chemical manufacturing and an effective solvent in coatings, adhesives, inks, and cleaning applications.
Xylene
Primary Uses
Chemical Industry
- Solvent for Paints, Varnishes, and Coatings: Dissolves resins, polymers, and additives, improving application and drying properties.
- Feedstock in Polyester Production: Used to manufacture terephthalic acid and dimethyl terephthalate, essential intermediates in polyester fiber and plastic production.
Laboratory & Industrial Cleaning
- Cleaning Agent: Removes grease, oil, and residues from laboratory glassware, metal parts, and equipment surfaces.
Printing Industry
- Ink Solvent: Provides appropriate viscosity and drying times in printing inks for various substrates.
Secondary Uses
Pharmaceutical Industry
- Chemical Intermediate: Involved in synthesis pathways of certain pharmaceutical compounds.
Rubber Industry
- Processing Aid: Incorporated in rubber cement formulations and used for cleaning rubber processing machinery.
Construction Industry
- Thinner & Degreaser: Used to thin adhesives and coatings and clean tools and surfaces.
Basic Identification Attributes
- Chemical Name (IUPAC): Dimethylbenzene
- Common/Trade Name: Xylene
- CAS Number: 1330-20-7
- HS Code: 2902.30.00
- Synonyms: Dimethylbenzene, Xylol
Physical & Chemical Properties
- Physical State: Liquid
- Color & Odor: Clear, colorless; sweet aromatic odor
- Boiling Point: 138–144 °C (depending on isomer)
- Flash Point: ~27 °C (closed cup)
- Solubility: Insoluble in water; soluble in alcohol, ether, and other organic solvents
- Density: Approx. 0.87 g/cm³
Safety & Hazard Attributes
- GHS Classification: Flammable liquid (Category 3), harmful if inhaled, skin irritant
- Toxicity: Moderate toxicity; prolonged exposure can cause central nervous system effects such as dizziness, headache, and nausea
- Exposure Limits: OSHA PEL: 100 ppm (8-hour TWA), ACGIH TLV: 100 ppm
Storage & Handling Attributes
- Storage Conditions: Store in a cool, well-ventilated area away from heat, sparks, open flames, and incompatible substances such as strong oxidizers
- Container Type: Steel drums or tightly sealed containers suitable for flammable liquids
- Shelf Life: Stable for several years if stored properly
- Handling Precautions: Use in well-ventilated areas, avoid inhalation and skin contact, wear protective gloves, goggles, and respiratory protection as needed
Regulatory & Compliance Attributes
- Complies with:
- OSHA (Occupational Safety and Health Administration) regulations for workplace safety
- REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) in the European Union
- TSCA (Toxic Substances Control Act) inventory requirements in the U.S.
- GHS (Globally Harmonized System) classification for chemical hazards
- Transport Regulations: Classified as a flammable liquid under ADR, IMDG, and DOT regulations (UN No. 1307)
- Manufactured under: Standard industrial chemical manufacturing practices; GMP applicable when used in pharmaceutical or food-grade synthesis contexts
- Environmental Compliance: Meets environmental laws for emissions, discharge, and disposal including EPA standards
- Safety Data Sheet (SDS): Provided in compliance with applicable regulations
Environmental & Health Impact
- Biodegradability: Readily biodegradable under aerobic conditions
- Ecotoxicity: Toxic to aquatic organisms; avoid release to waterways
- Bioaccumulation: Potential for bioaccumulation in aquatic organisms
Safety Handling Precautions
- PPE Required: Protective gloves, safety goggles, and respirators recommended in confined or poorly ventilated spaces
- Handling Guidelines: Minimize vapour inhalation; avoid static discharge and ignition sources
- Storage Measures: Keep containers tightly closed and away from incompatible materials
First Aid Measures
- Inhalation: Move victim to fresh air immediately; seek medical attention if symptoms persist
- Skin Contact: Wash thoroughly with soap and water; remove contaminated clothing
- Eye Contact: Flush eyes with water for at least 15 minutes; seek medical advice if irritation persists
- Ingestion: Do not induce vomiting; seek immediate medical attention
Firefighting Measures
- Fire Hazards: Highly flammable liquid and vapor; vapors may form explosive mixtures with air
- Extinguishing Media: Use foam, dry chemical powder, or carbon dioxide extinguishers
- Hazardous Combustion Products: Carbon monoxide, carbon dioxide, and other toxic fumes