Xylene Extra Pure

1. Basic Identification Attributes

Chemical Name: Xylene (mixture of isomers: ortho-, meta-, para-)
CAS Number: 1330-20-7
HS Code: 2902.30.00
Molecular Formula: C₈H₁₀
Synonyms:

• Dimethylbenzene
• Xylol
• Wood naphtha

2. Physical & Chemical Properties

Physical State: Liquid
Color & Odor: Clear, colorless to pale yellow; aromatic, sweet odor
Boiling Point: 138–144 °C (depending on isomer)
Melting Point: −47 to −25 °C (depending on isomer)
Density/Specific Gravity: ~0.86 g/cm³ at 20 °C
Solubility:

• Slightly soluble in water (~0.02 g/100 mL)
• Miscible with most organic solvents (alcohols, ethers, acetone)
  pH Level: Neutral
  Vapor Pressure: ~6 mmHg at 25 °C
  Flash Point: ~27 °C (closed cup)
  Autoignition Temperature: ~464 °C
  Viscosity: ~0.6 cP at 25 °C

3. Safety & Hazard Attributes

Hazard Class (GHS Classification):

• Flammable liquid (Category 3)
• Skin irritation (Category 2)
• Specific target organ toxicity — single exposure (Category 3: respiratory tract irritation)
  NFPA Ratings:
• Health: 2
• Flammability: 3
• Reactivity: 0
  Exposure Limits:
• OSHA PEL: 100 ppm (435 mg/m³)
• ACGIH TLV: 100 ppm (435 mg/m³)
  Reactivity:
• Stable under normal conditions
• Reacts violently with strong oxidizers

4. Storage & Handling Attributes

Storage Conditions:

• Store in a cool, well-ventilated area away from ignition sources
• Keep containers tightly closed and grounded
  Incompatible Materials:
• Strong oxidizing agents
• Strong acids and bases
  Container Type:
• Metal drums or glass containers with secure seals
  Shelf Life & Expiration Date:
• Stable for several years if stored properly
  Special Handling Requirements:
• Use explosion-proof equipment
• Avoid inhalation of vapors; use in fume hoods
• Wear chemical-resistant gloves and eye protection

5. Regulatory & Compliance Attributes

Regulatory Status:

• Compliant with major pharmacopeia and analytical reagent standards
• Listed in REACH, OSHA, EPA inventories
  Transportation Restrictions:
• Classified as flammable liquid under transport regulations
  Waste Disposal Method:
• Dispose according to hazardous waste regulations
• Avoid release into environment

6. Environmental & Health Impact

Ecotoxicity:

• Toxic to aquatic organisms; avoid discharge into waterways
  Persistence in Environment:
• Volatile; biodegrades slowly under aerobic conditions
  Carcinogenicity/Mutagenicity:
• Not classified as carcinogenic by IARC; some isomers may have suspect evidence
  Biodegradability:
• Moderate biodegradability