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Schott Duran Laboratory Glassware


The basic material for most of the products listed is DURAN the borosilicate glass developed by SCHOTT which now represents the standard for laboratory glassware in Australia and all over the world.
DURAN is a special borosilicate glass of the first hydrolytic class. Its invention was one of Otto Schott's great achievements. Laboratory and chemical plant technology would be unthinkable without DURAN tubing, capillary and rod, which provide the basis for custom-made solutions to specific problems.

Products made from DURAN are well-known for their stability, good workability and high thermal shock resistance. DURAN has a very low rate of thermal expansion which makes it an excellent material for laboratory glassware and for use in large-scale technological plants in the chemical apparatus industry in Australia and all over the world.

A comprehensive range of Beakers, Boiling Flasks, Erlenmeyer Flasks, Test Tubes, Distillation Flasks and a variety of other products for use in the laboratory. The main material used in the manufacture of these products is SCHOTT Duran 3.3 low expansion Borosilicate glass.

Schott Duran laboratory glassware comprises in the main following items:

  • Beakers, low form (5–10,000 ml) and high form (50–3,000 ml) and various other types
  • Bell jars with knob or neck bore (three sizes in each)
  • Burettes, class B, with straight standard ground stopcock (10–100 ml)
  • Burettes, class AS, with straight standard ground stopcock, Schellbach stripe and main graduations all round tube (10–50 ml)
  • Crystallizing dishes (20–3,500 ml) with or without pouring lip
  • Cylinders with knobbed lid (six sizes)
  • Cylinders with round foot (five sizes)
  • Desiccators
  • Distillation flasks (100–1,000 ml)
  • Evaporating dishes (15–2,500 ml)
  • Engler flasks (100, 125 and 150 ml), also with standard ground joint (125 ml)
  • Erlenmeyer flasks, narrow neck (25–5,000 ml), wide neck (25–10,000 ml) or with DIN thread (100–1,000 ml)
  • Flat bottom flasks, narrow neck (50–10,000 ml) and wide neck (50–2,000 ml)
  • Funnels with short stem (Ø 30–300 mm), also in soda-lime glass
  • Glass ceramic laboratory protection plates (three sizes) with quadrupods or chrome-nickel steel holders
  • Jars of various sizes and types
  • Mixing cylinders with hexagonal foot, graduated, standard ground and plastic stoppers (10–2,000 ml)
  • Measuring cylinders with hexagonal foot and graduated (5–2,000 ml)
  • Measuring cylinders, low shape, with hexagonal foot (10–2,000 ml)
  • Measuring pipettes, class B and AS, soda-lime glass for full and partial outflow or alternatively both (0.1–25 ml)
  • Microburettes, class AS, with straight standard ground stopcock, Schellbach stripe and main graduations all round tube, waiting time: 30 sec. (1–5 ml)
  • Multi-purpose-cylinders with round base (ten sizes)
  • Museum jars with glass plate (seven sizes)
  • Organ storage jars (75, 100 and 150 ml)
  • Petri dishes in different types and sizes
  • Powder funnels with short, wide stem (Ø 50–200 mm), also in soda-lime glass
  • Round bottom flasks, with narrow and wide neck (50–20,000 ml)
  • Sedimentation cone (500 ml)
  • Sedimentation cone, Imhoff type, with or without stopcock (1,000 ml)
  • Specimen jars (five sizes)
  • Spirit lamp, soda-lime glass (100 ml)
  • Test tubes (three different versions) DURAN test tubes with and without beaded rim (14 sizes)
  • Watch glass dishes (40–250 ml), also soda-lime glass
  • Weighing bottles with cover, flat and tall shape (four sizes in each)
Certification to DIN EN ISO 9001Quality “signed and sealed”DURAN GROUP complies with the highest, internationally recognized quality requirements – worldwide. ISO 9001 certification guarantees our customers and business partners that they are receiving products that have been developed and produced to the highest international quality standards.

Low form Beakers and High form Beakers

Schott Duran beakers are widely used in laboratories. The low form is ideal for heating up contents on laboratory hotplates or Bunsen burners. The tall form is ideal for heating up contents in liquid or sand baths, as the tall shape of the beaker protects its contents from the surrounding medium. There is thus no risk of cross-contamination.
Graduated beakers should not be used for volume measurement purposes as the printed scale only indicates the contents within a tolerance of +/-10%.

Bottles with rolled flange

Schott Duran bottles with rolled flange are mainly used for storing samples. The clamp closure provides a practical means of opening and closing the bottle.

Burettes

Burettes are used exclusively for titration measurement. The quantity of liquid required for the titration, which is not known in advance, can be read accurately upon completion of the reaction. Schott Duran burettes are calibrated to deliver at a reference temperature of 20°C. The volume content tolerances for burettes meet the accuracy limits of the German weights and measures regulations and the ISO and DIN recommendations. The accuracy limits of the Schott Duran Class B; version are about 1.5 times the accuracy limits of Class AS. They are, therefore, better than required by DIN.

By specifying a Class AS; the German weights and measures regulations within the framework of the 15th Amending Regulations have taken into account that the great majority of volumetric measurements, especially in clinical laboratories, are carried out with water or dilute aqueous solutions; thus apparatus with considerably shorter run-off times than previously required, but with the same accuracy limits, are now accepted for calibration.

Centrifuge tubes

The difference between Duran centrifuge tubes and other types of tubes is their wall thickness and their sturdy design. They have to withstand the high loads generated in laboratory centrifuges. The mixture to be separated rotates at high speed around an axis in the centrifuge tube. This causes the heavier particles to fly faster and further away from the axis than the lighter ones. This results in separation.

These tubes are approved to DIN 58 970 (Part 2) for a maximum relative centrifugal acceleration of 4000 and filling in line with their capacity with contents having a maximum density of 1.2 g/ml.

Culture bottles

Schott Duran cylindrical and conical culture bottles are mainly used for developing cultures to grow media. These are closed with cotton wool plugs, metal caps, glass caps, etc. It is important that an exchange of air to take place while maintaining sterility. The neck finish of the bottles is generally straight (i.e. not a beaded rim). The beaded rim is, of course better for pouring purposes (no drips), but it increases the risk of contamination, since microorganisms can become trapped under the rim.

Culture flasks

Schott Duran culture flasks have large bottom surfaces. These should be as flat as possible so that the thickness of the microorganism layer can grow to a uniform height. The cultures are often irradiated with IR or UV light to speed up their growth. Duran flasks are absolutely ideal for this.The following are typical Duran culture flasks:
  • Fernbach flasks Kolle flasks Roux flasks
  • Penicillin flasks

The difference is the shape.

Desiccators

The Schott Duran desiccator is a laboratory vessel with a ground lid, which is suitable for use under vacuum. It is used for the storage of substances that are sensitive to moisture and for drying moist products. The lower part is divided by a sieve plate and serves as a receptacle for water-absorbent substances such as anhydrous calcium chloride. These drying agents draw out the moisture from the substance to be dried. Drying agents should not be placed directly in the desiccator. Rather, an appropriately sized crystallizing dish should be filled with the drying agent and place it inside. Place the substance to be dried on the sieve plate and close the desiccator tightly. All Duran desiccators are suitable for use under vacuum, i.e. they can be used up to the technically maximum possible vacuum.

Dishes

There are various types of Schott Duran dishes: evaporating dishes, crystallizing dishes and watch glass dishes.

Evaporating dishes and crystallizing dishes can be used for evaporating liquids and crystallizing out solids respectively. Watch glass dishes are used as weighing dishes and to cover beakers, Erlenmeyer flasks, etc.

Schott Duran Erlenmeyer flasks

Typical uses for Schott Erlenmeyer flasks include boiling and swirling. They are also used as components in apparatus. Their shape makes them ideal for mixing and storing liquids.

An advantage of the conical shape is that there is little tendency for precipitates to stick to the inside surface as they slide down the wall with the rest of the contents. Duran Erlenmeyer flasks are also used as culture flasks.

Filter crucibles

Schott Duran glass filter crucibles have a wide range of applications in quantitative analysis. They are particularly suitable for precipitates which need to be dried to a constant weight. After careful cleaning, the filter crucible quickly reaches a constant weight at 110°C, as the water remaining evaporates. After filtration the moist precipitate is placed in the Duran glass filter crucible in the hot drying cabinet at a temperature up to 150°C where it is dried to a constant weight.

Depending on the method of determination, it can be cooled by exposure to air or in a desiccator. To calcine a precipitate, the crucible is placed in a cold oven, which then can be heated up to a maximum of 500°C. After the oven has been switched off, the crucible should be allowed to cool down to about 200°C in the oven.

Filter Funnels with a sintered disk

Filter funnels with a sintered disk are mainly used in qualitative analysis, preparative chemistry and sterile filtration. They are connected to the filtering flask by means of a Guko (conical rubber gasket).

Schott Filtering flasks

Filtering flasks are used for drawing off liquids and vacuum filtration. Duran filtering flasks are available in both conical and cylindrical form. To ensure suitability for use under vacuum they have an appropriate wall thickness. DIN 12 476 prescribes an appropriate pressure test to ensure that items are suitable for use under vacuum. All Schott filtering flasks are suitable for use under vacuum.
Hose connections are available in both plastic and glass (glass tubulature, glass hose connection, plastic hose connection, plastic tubulature). Glass hose connections are no longer approved for use in Germany because of the high risk of injury.

Filtering flasks with a glass hose connection (female)

Filtering flasks are used for drawing off liquids and vacuum filtration. Duran filtering flasks are available in both conical and cylindrical form. To ensure suitability for use under vacuum they have an appropriate wall thickness. All Schott filtering flasks are suitable for use under vacuum, as is described in DIN 12 476, which specifies an appropriate pressure test to ensure that items are suitable for use under vacuum.

The introduction of filtering flasks with a glass hose connection (female) has simplified and facilitated work in preparatory and analytical laboratories. In addition, filtering flasks reduce the risk of accidents.

Filtering flasks with a glass hose connection (male)

Filtering flasks are used for drawing off liquids and vacuum filtration. Schott Duran filtering flasks are available in both conical and cylindrical form. They have an appropriate wall thickness to ensure suitability for use under vacuum. DIN 12 476 prescribes a pressure test to ensure that items are suitable for use under vacuum. All Schott filtering flasks can be used under vacuum.

Glass hose connections are no longer approved for use in Germany because of the high risk of injury.

Filtering flasks with a ground socket

Filtering flasks are used for drawing off liquids and vacuum filtration. Duran filtering flasks are available in both conical and cylindrical form. To ensure suitability for use under vacuum they have an appropriate wall thickness. DIN 12 476 prescribes an appropriate pressure test to ensure that items are suitable for use under vacuum. All Schott filtering flasks are suitable for use under vacuum.

Duran filtering flasks with plastic hose connections and plastic tubulatures provide protection and safety for laboratory workers and the laboratory. Their design makes it easier to fit and remove the vacuum tubing.

Flasks with a ground socket

Various versions of Duran flasks with a ground socket are used for special tasks. For distillation, fractionation and reaction, multi-neck flasks are used predominantly so that they can be combined with other attachments such as columns, thermometers, dropping funnels, boiling capillaries, etc. Single-neck round bottom flasks are used for simple distillation work and as receiver flasks, for freeze drying, in vacuum apparatus, etc.

Flasks with a ground socket (flat bottom)

Various versions of Duran flasks with a ground socket are used for special tasks. For distillation, fractionation and reaction, multi-neck flasks are used predominantly so that they can be combined with other attachments such as columns, thermometers, dropping funnels, boiling capillaries, etc. Single-neck round bottom flasks are used for simple distillation work and as receiver flasks, for freeze drying, in vacuum apparatus, etc.

For most uses, Schott flat bottom flasks are supplied with a single ground neck. They may be used only for applications where no pressure is involved.

Schott Duran Funnels

Schott funnels are used for filling and filtration. Round paper filters are available for the funnels, which are used for simple filtration. Because of the shape of Duran analytical funnels, they can be used for rapid filtration tasks. A slight vacuum is formed in the hollow chamber on the inside of the funnel, which results in suction being applied to the liquid being filtered.

Gas distribution tubes

In addition to its use for filtration, Duran is also well suited for applications in gas filtration apparatus in the distribution of gases and liquids. Duran gas distribution tubes are used for reactions between gases and liquids.

Gas washing bottles

By distributing gases in liquids through filter disks in Duran gas washing bottles, the efficiency of the absorption can be significantly increased. Gas washing bottles of this type still work reliably even at high flow rates.

Glass-ceramic laboratory protection plates

Traditionally asbestos covered metal plates were used to protect glass items heated by Bunsen burners. Asbestos is, however, a health risk and its use in laboratories is no longer permitted. That is why glass-ceramic laboratory protection plates are now used. This glass-ceramic has an extremely low thermal expansion. As a result it is very resistant to thermal shock and can be used between -200°C and 700°C. Quadrupods and plate holders for support stands are available as accessories.

Immersion filters

Schott immersion filters are used for reverse filtration. When the purpose of suction filtration is to recover a fairly large quantity of clear filtrate and not the solid content, what is known as reverse filtration is used in many cases. The precipitate is allowed to settle and the liquid standing above it is drawn off through an immersion filter. As there is little tendency for filter cakes to form on the filter disk, high filtration speeds can be achieved and fairly large quantities processed.

Laboratory bottles

Schott laboratory bottles are stable, and like all Duran items, are resistant to chemical attack and highly resistant to thermal shock. When fitted with a pouring ring, dripping is virtually eliminated. As there is only one screw thread size for all bottle sizes from 100 ml and up, the screw caps and pouring rings are totally interchangeable. The bottles, pouring rings and caps can be sterilized.

Pressure resistant (-1/+1.5 bar) and amber stained laboratory bottles are also available. Caps are also available in different colors to facilitate identification in the laboratory.

Schott Duran Measuring cylinders Australia

Schott Duran Measuring cylinders are used as receptacles and also for measuring various quantities of liquid. Mixing cylinders can be used for diluting solutions and mixing several components in a given quantity ratio. Schott measuring and mixing cylinders are highly resistant to mechanical and thermal loads. The large hexagonal base with 3 dimples on the bottom increases stability and prevents the cylinder from rolling away.

The cylinders have uniform wall thickness over the entire measuring range, which avoids the risk of errors due to wedging. They are calibrated at a reference temperature of 20°C. Accuracy limits for measuring and mixing cylinders are described in DIN 12 680 and DIN 12 685.

Pear shaped flasks

Various versions of Duran flasks with a ground socket are used for special tasks. For distillation, fractionation and reaction, multi-neck flasks are used predominantly so that they can be combined with other attachments such as columns, thermometers, dropping funnels, boiling capillaries, etc. Single-neck round bottom flasks are used for simple distillation work and as receiver flasks, for freeze drying, in vacuum apparatus, etc.

Schott Duran pear shaped flasks are used for handling small quantities of substances. All flasks are heated mostly in liquid baths or heating mantles.

Schott Duran Petri Dishes Australia

Schott Duran petri dishes are used especially for biological and medical work.
The better the glass surface of the petri dish, the better it is for use under the microscope. It must be flat, so that it can be stacked in minimal space without slipping. Duroplan petri dishes are transparent without distortion and optimally flat.

Schott Duran Pipettes

Pipettes are used for accurate measurement and the discharging of liquids. It is possible to discharge only specific quantities with bulb pipettes. Graduated pipettes, however, enable different quantities of liquid to be taken up which can then be discharged in part or entirely. Duran pipettes are calibrated to deliver at a reference temperature of 20°C. The volume content tolerances for etchable pipettes meet the accuracy limits of the German weights and measures regulations and the ISO and DIN recommendations. The accuracy limits of the Schott Duran Class (B) version are about 1.5 times the accuracy limits of ClassA. They are, therefore, better than required by DIN.

Plastic coated laboratory bottles

Plastic coated Schott Duran laboratory bottles, known as Duran Protect, are a practical addition to the conventional Duran laboratory bottle range.

The coating provides protection against mechanical damage and prevents the contents from escaping in the event of breakage. It also prevents broken glass flying about.

The plastic, which is cross-linked copolymer (polyurethane) based, stays transparent and adheres to the surface of the glass even after repeated sterilization in the autoclave (135°C). Duran Protect can be refrigerated down to -30°C and can be microwaved. Pressure resistant (-1/+1.5 bar) and amber Duran Protect laboratory bottles are also available.

Reagent bottles

Schott Duran reagent bottles are available in both wide neck and narrow neck form. Narrow neck bottles are ideal for the storage of liquids, since liquids are easier to pour from a narrow neck. Wide neck bottles are used for the storage of powders, since powders do not block large diameter neck. Amber reagent bottles are particularly suited to the storage of light-sensitive substances. Thus, there is no need to store them in dark places or closets.

Roller bottles

Schott Duran roller bottles are used for the mass production of cells and viruses. Several bottles are used at a time on a roller unit. The bottles have the largest possible horizontal and peripheral growth surfaces. They have outstanding optical clarity.

Round bottom flasks

Schott flasks are used for distillation, reaction, extraction, etc.

They are heated up, as a rule, in heating mantles and liquid baths. Hot and cold spots should be avoided during heating up and cooling down. Round bottom flasks can be used for work under vacuum, but only if the surface of the glass is undamaged, i.e. no bruises or scratches, etc.

Round flat bottom flasks

Various versions of Schott Duran flasks with a ground socket are used for special tasks. For distillation, fractionation and reaction, multi-neck flasks are used predominantly so that they can be combined with other attachments such as columns, thermometers, dropping funnels, boiling capillaries, etc. Single-neck round bottom flasks are used for simple distillation work and as receiver flasks, for freeze drying, in vacuum apparatus, etc.

Evaporating flasks are used as rotating distillation flasks in rotary evaporators.

Square laboratory bottles

Duran square laboratory bottles provide a space-saving alternative to the well-know round Schott Duran laboratory bottles. Operating and storage costs can be saved in the sterilization, stocking, storage of specimens, as well as in the transport of samples and reagents of all types:
  • in the autoclave
  • on the shelf
  • in the refrigerator
  • in sample storage.
Additional benefits:
  • First-class processing quality ;Smooth edges; make them easy to clean Easy to handle (fit the hand, easy to label) Non-slip bottom (embossed, dimpled pattern)
  • Extremely stable

Test tubes

Test tubes are used for simple experiments, in particular for qualitative chemical analyses. Duran are available in a variety of sizes. Test tube sizes are only roughly matched to a particular capacity. The exact capacity does not matter. There is, therefore, no need for any indication of capacity or calibration. The crucial factor when carrying out experiments in test tubes is generally the change that occurs to the contents, e.g. any change in color. Duran test tubes are available with or without beaded rim. If the contents are frequently poured or shaken, it is advisable to use test tubes with beaded rim.

Volumetric flasks

Volumetric flasks for the accurate measurement of specific quantities of liquid, like virtually all volumetric glassware, are quantitative analysis aids. Chemists use them principally for the preparation and storage of standard solutions. For that reason they must be highly resistant to chemical attack. Duran volumetric flasks ensure high chemical resistance.

Volumes are calibrated at a reference temperature of 20°C. The volume content tolerances for Class A volumetric flasks meet the accuracy limits of the German weights and measures regulations and the ISO and DIN recommendations.

Weighing bottles

Duran weighing bottles are used for weighing substances on analytical scales.

They have a ground lid with a knob that can be gripped with tweezers. The lid prevents the weighed substances from exiting the vessel by drafts while being moved in the laboratory, and thus reducing the weight of the substance.
Product Price List Here you will find our 2007 Schott Duran Product price List available for download and printing. Download the Price List - PDF (Size:4.9MB) NEW 07/08 Schott Duran Laboratory Glassware Catalogue now available from Aunet Australia. order your copy here