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Duratherm XLT-2 – Safety Data Sheet (SDS)

Last Updated: December 8, 2021 Duratherm XLT-2 is a high-performance heat transfer fluid manufactured by Duratherm. It is a hydrocarbon-based mixture of C10–C13 isoparaffins designed for use in low-temperature and closed-loop thermal systems. Classified as a combustible liquid and an aspiration hazard, this product requires careful handling and storage under proper safety conditions.

Link to Safety Data Sheet (PDF)

Quick Facts

  • Product Name: Duratherm XLT-2
  • Type: Heat Transfer Fluid
  • Supplier: Duratherm
  • Address: P.O. Box 563, Lewiston, NY 14092
  • Phone: 1-905-984-6677
  • Email: info@durathermfluids.com
  • GHS Classification: Aspiration Hazard – Category 1; Flammable Liquid – Category 4
  • Signal Word: Danger
  • NFPA Ratings: Health (1), Flammability (2), Reactivity (0)

Hazards & Safety

  • Hazard Statements:
    • May be fatal if swallowed and enters airways (H304).
    • Combustible liquid (H227).
  • Precautionary Statements:
    • Keep away from heat, sparks, open flames, and hot surfaces. No smoking.
    • Wear protective gloves, clothing, and eye protection.
    • Do not induce vomiting if swallowed. Seek medical help immediately.
    • Store locked up in a cool, well-ventilated area.
    • Dispose of product and container in accordance with local and national regulations.
  • Repeated exposure may cause skin dryness or cracking.
  • California Prop 65: Not listed.

First Aid Measures

  • Eyes: Remove contact lenses and rinse with water for several minutes. Seek medical attention if irritation occurs.
  • Skin: Wash thoroughly with soap and water. Remove contaminated clothing.
  • Inhalation: Move to fresh air. If symptoms persist, seek medical attention.
  • Ingestion: Do not induce vomiting. Rinse mouth with water and contact a physician or poison control center immediately.
  • Note to Physicians: Potential for chemical pneumonitis; treat symptomatically.

Fire & Explosion Data

  • Flash Point: >61 °C (ASTM D92 COC)
  • Extinguishing Media: Water spray, foam, dry chemical, carbon dioxide, or sand for small fires.
  • Unsuitable Media: Do not use water jets.
  • Combustibility: Flammable vapors may form and spread along surfaces. Vapors are heavier than air.
  • Protective Gear: Firefighters should wear SCBA and full protective gear.
  • Hazardous Decomposition: Carbon monoxide, carbon dioxide, and unidentified organic compounds.

Handling & Storage

  • Avoid breathing vapors or mists. Use only in well-ventilated areas.
  • Keep away from sparks, static discharge, and open flames.
  • Ground and bond all transfer and storage equipment.
  • Store in tightly closed containers in a diked, well-ventilated area away from oxidizing agents.
  • Do not reuse empty containers.

Exposure & PPE

  • Eyes: Safety glasses or goggles.
  • Skin: Nitrile, PVC, or neoprene gloves.
  • Respiratory: Use NIOSH-approved respirator if airborne concentrations exceed safe limits.
  • Ventilation: Explosion-proof local exhaust recommended.
  • Clothing: Antistatic, flame-retardant garments when required.
  • HMIS PPE Code: B

Physical & Chemical Properties

  • Appearance: Colorless liquid
  • Odor: Mild hydrocarbon odor
  • Boiling Point: 356–446 °F (180–230 °C)
  • Flash Point: >61 °C
  • Density: <0.8 g/mL (15 °C)
  • Solubility: Insoluble in water
  • Auto-Ignition Temperature: >392 °F (>200 °C)
  • Viscosity: <2 mm²/s (25 °C)
  • Explosive Limits: 0.5–7% (v/v)
  • Partition Coefficient (log Pow): 4.5–7

Stability & Reactivity

  • Stable under normal conditions.
  • Avoid heat, sparks, and open flames.
  • Incompatible with strong oxidizing agents.
  • Hazardous polymerization will not occur.
  • Thermal decomposition may produce carbon oxides and sulfur oxides.

Toxicology & Ecology

  • Acute Oral Toxicity: LD₅₀ (rat) >5,000 mg/kg
  • Dermal Toxicity: LD₅₀ (rabbit) >5,000 mg/kg
  • Inhalation Toxicity: LC₅₀ (rat, 4h) near saturated vapor concentration
  • Irritation: Not classified; prolonged exposure may cause dermatitis.
  • Carcinogenicity: Not classified by IARC, OSHA, or NTP.
  • Aspiration Hazard: May cause chemical pneumonitis if swallowed or vomited.
  • Aquatic Toxicity: Practically non-toxic to aquatic life (LL₅₀ >100 mg/L).
  • Persistence: Expected to be readily biodegradable.
  • Bioaccumulation: May bioaccumulate.

Transport & Disposal

  • UN Number: Non-regulated material
  • Proper Shipping Name: Non-regulated material
  • Hazard Class: Not regulated
  • Packing Group: Not applicable
  • Marine Pollutant: No
  • Disposal: Recover or recycle if possible. Dispose of waste and contaminated containers in accordance with local, state, and federal laws.

Regulatory Status

  • Listed on the US TSCA, DSL, and EINECS inventories.
  • SARA 311/312: Fire Hazard, Acute Health Hazard
  • SARA 302/313: None
  • Clean Water Act: Not listed
  • California Prop 65: Not listed.
  • NFPA Ratings: Health (1), Flammability (2), Reactivity (0)