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DURAN

DURAN is a brand of laboratory glassware manufactured by DURAN Group, a company with roots in the German glass industry dating to the late 19th century. The brand is known for borosilicate glass 3.3, a material with a low coefficient of thermal expansion and high resistance to chemical attack, which is used across its range of bottles, flasks, and other lab vessels. DURAN products are widely specified in analytical, pharmaceutical, and industrial laboratories where consistent volume measurement and material inertness are required. 3G Electric supplies DURAN laboratory glass bottles and closures to technical buyers worldwide, including plant engineers, maintenance managers, and procurement specialists who need documented specifications and reliable pack quantities.

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About DURAN

DURAN is a brand of laboratory glassware manufactured by DURAN Group, a company with roots in the German glass industry dating to the late 19th century. The brand is known for borosilicate glass 3.3, a material with a low coefficient of thermal expansion and high resistance to chemical attack, which is used across its range of bottles, flasks, and other lab vessels. DURAN products are widely specified in analytical, pharmaceutical, and industrial laboratories where consistent volume measurement and material inertness are required. 3G Electric supplies DURAN laboratory glass bottles and closures to technical buyers worldwide, including plant engineers, maintenance managers, and procurement specialists who need documented specifications and reliable pack quantities.

The DURAN line available through 3G Electric centers on wide mouth round glass lab bottles in capacities from 100 mL to 5 L. These bottles are offered in clear (colorless) and amber glass. Amber versions are intended for storage of light-sensitive chemicals and reagents, while clear versions allow visual inspection of contents. Many items are graduated for approximate volume measurement. Safety-coated variants are available; the coating is applied to reduce the risk of glass fragmentation if the bottle is dropped or impacted. Screw closure sizes include 45 mm and 80 mm, with GL45 threaded caps available separately. The bottles are supplied in packs of 10 for smaller capacities and as single units for larger sizes such as 5 L. Closure options include blue polypropylene screw caps with an unlined design, which are autoclavable for sterile applications.

Technical buyers should note that DURAN bottles are made from borosilicate glass 3.3, which meets the requirements of ISO 3585 and has a typical working temperature range up to 500 °C for short-term use, depending on the specific product. The glass is resistant to most acids, alkalis, and organic solvents, though hydrofluoric acid and hot concentrated phosphoric acid are exceptions. The safety-coated bottles combine the chemical resistance of borosilicate glass with a plastic coating that contains fragments if breakage occurs, which is relevant in environments where glass shards pose a contamination or injury risk. The graduated markings are printed in durable enamel and are intended for approximate volume indication, not for analytical precision. Caps are available in polypropylene, which is autoclavable at 121 °C and resistant to many common lab chemicals.

3G Electric supports the DURAN line by stocking a range of bottle sizes, colors, and closure types, and by providing access to manufacturer part numbers and specifications for procurement and documentation. The product data includes capacity, closure size, graduation status, body color, and pack quantity, allowing buyers to match items to existing labware inventories or equipment requirements. For global customers, 3G Electric handles export documentation and logistics for glassware shipments, which require careful packing to prevent breakage in transit. The DURAN brand is not limited to any single region; 3G Electric supplies these products to customers worldwide, and the catalog reflects the full range of standard items rather than a region-specific subset. Buyers can request quotes for specific SKUs, and 3G Electric can source additional DURAN items beyond those listed in the online catalog, subject to availability from the manufacturer.

Common Applications

  • Pharmaceutical quality control — DURAN amber wide mouth bottles for light-sensitive reference standards and reagents
  • Chemical manufacturing — Safety-coated DURAN 1 L and 5 L bottles for sampling and temporary storage of process liquids
  • Environmental testing laboratories — Clear DURAN 250 mL graduated bottles for water and soil extract storage
  • Food and beverage analysis — DURAN GL45 screw caps with polypropylene construction for autoclavable sample containment
  • Academic research — DURAN 100 mL wide mouth bottles for general lab storage of solvents and solutions
  • Industrial maintenance — Safety-coated DURAN bottles for handling lubricants, coolants, and cleaning agents on plant floors

Frequently asked questions

Common questions about DURAN from 3G Electric.

What is the difference between DURAN clear and amber glass lab bottles?

DURAN clear (colorless) bottles are made from transparent borosilicate glass 3.3, allowing visual inspection of contents. Amber bottles are made from the same base glass but colored to block transmission of ultraviolet and short-wavelength visible light, which helps protect light-sensitive chemicals and reagents from photodegradation. Both types are available in wide mouth round forms with graduated markings and screw closures. The choice depends on whether the stored material is sensitive to light; for general storage, clear bottles are often used, while amber is specified for photosensitive compounds. Both versions are available with or without safety coating.

What does the safety coating on DURAN bottles do?

The safety coating on DURAN bottles is a plastic layer applied to the exterior of the glass. If the bottle is dropped or impacted and the glass breaks, the coating helps contain the fragments, reducing the risk of injury and preventing glass shards from spreading. This is particularly relevant in busy laboratories, on production floors, or in mobile applications where breakage could cause contamination or personnel injury. The coating does not affect the chemical resistance of the borosilicate glass or the ability to autoclave the bottle, although users should verify temperature limits for the coating itself. Safety-coated bottles are available in both clear and amber versions and in capacities from 100 mL to 5 L.

Are DURAN GL45 screw caps autoclavable?

Yes, the blue polypropylene GL45 screw caps supplied for DURAN bottles are autoclavable. Polypropylene is resistant to steam sterilization at typical autoclave temperatures (121 °C). The caps are unlined, meaning they do not have a separate liner or seal; the seal is formed by the cap's contact with the bottle neck. This design avoids liner compatibility issues with solvents or chemicals. For sterile applications, the caps can be autoclaved separately or with the bottle, depending on the protocol. Note that repeated autoclaving may gradually affect the appearance or flexibility of the plastic, but the caps remain functional for many cycles.

What is the temperature range for DURAN borosilicate glass bottles?

DURAN bottles are made from borosilicate glass 3.3, which has a low coefficient of thermal expansion (approximately 3.3 × 10⁻⁶ K⁻¹ between 20 °C and 300 °C). This makes the glass resistant to thermal shock. The recommended working temperature for short-term use is up to 500 °C, but continuous service is typically limited to lower temperatures, and the actual limit depends on the specific product and whether it has a safety coating. For safety-coated bottles, the plastic coating may have a lower temperature limit, often around 135 °C for autoclaving. Users should avoid rapid temperature changes beyond the glass's thermal shock resistance and consult the manufacturer's data for specific applications.

Can DURAN wide mouth bottles be used for storing solvents?

DURAN wide mouth bottles are made from borosilicate glass 3.3, which is resistant to most organic solvents, including acetone, ethanol, methanol, and toluene. The glass does not react with or leach into solvents, making it suitable for storage. However, the choice of closure is important: the standard blue polypropylene caps are resistant to many solvents but may be attacked by certain aggressive chemicals. For solvent storage, verify compatibility of the cap material with the specific solvent. The wide mouth design facilitates filling and cleaning, and the graduated markings allow approximate volume checks. Safety-coated versions add an extra layer of protection against breakage. Always follow local regulations for flammable liquid storage.

What sizes of DURAN wide mouth round glass bottles does 3G Electric supply?

3G Electric supplies DURAN wide mouth round glass bottles in capacities including 100 mL, 250 mL, 500 mL, 1 L, and 5 L. Smaller sizes (100 mL, 250 mL, 500 mL, 1 L) are typically supplied in packs of 10, while the 5 L size is available as a single unit. Bottles are offered in clear and amber glass, with or without safety coating. Screw closure sizes are 45 mm for the smaller bottles and 80 mm for the larger ones. Graduated markings are present on most items. For specific SKUs and current availability, buyers can request a quote from 3G Electric, which can also source additional DURAN items not listed in the online catalog.