Laboy Glass 25mL Single Neck Round Bottom Boiling Flask Heavy Wall with 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware
Laboy Glass 25mL Single Neck Round Bottom Boiling Flask Heavy Wall with 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware
  • STANDARD SIZE--- This round bottom flask designed with 24/40 standard taper outer joint,interchangeable,leak-free,comparing to common boiling flask without ground joint, it is convenient,safe,easy-operation in laboratory glassware setup. Capacity of 25mL.
  • HEAT-RESISTANT DESIGN ---With spherical bottoms,this RBF is more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. Laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree Celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in Chemistry processes like heating and cooling.
  • WIDELY USED----The round bottom flask is widely used in organic chemistry,in a distillation or vacuum distillation apparatus ,it’s used a a distillation flask and receiving flask with a glass condenser and some adapters like the 14 way distillation adapter,take-off adapter;In a reflux process,it’s used as a reaction flask with a reflux condenser.It is also used as a Distilling flask in rotary evaporators.
  • HIGH QUALITY---Laboy glass condensers are all made of high quality boroslicate glass according to ASTM E438,heavy wall design,durable and reusable.The ground joints are precisely grounded according to US standard.
  • BUY WITH CONFIDENCE----100% 90 DAY MONEY BACK GUARANTEE simply return for a full refund,no question asked
color:
  • 25mL
Retail Price: $ 10.77
Wholesale Price: Inquire Now

Round-bottom flasks (also called round-bottomed flasks, Flasks, round bottom, or RB Flasks)having spherical bottoms are more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. Because of the spherical bottom, cork rings are needed to keep the round bottom flasks upright,or heated by the water bath ,oil bath or sand bath.When in use, round-bottom flasks are commonly held at the neck by flask clamps on a stand.

The flasks are usually used in heating or boiling a liquid, in distillation as distilling flasks and receiving flasks for the distillate, used as the distilling flasks in rotary evaporators.It is usually used with other jointed lab glassware like glass condenser,separatory funnels,cow receivers.

The round bottom flask has larger heating surface than the flat bottom flask and can be heated evenly.It is usually used in the laboratory operation requiring high temperature and long time heating,or vacuum distillation.

Laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree Celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in Chemistry processes like heating and cooling.

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US Standard Size Joint Will Fit into European Standard Size Joint

Standard Taper Ground Glass Joints are interchangable.For either frosted, presicon-ground standard taper joints (same size),the inner ground surfaces (male joint) make a good seal with the outer(female joint)). The joint size is described by the form A/B. The first number A represents the outer diameter (OD) in millimeters (mm) at the widest point of the inner (male) joint and the second number B represents the length of the joint. For example, a 14/20 joint is 14 mm wide at the top (the widest part) and is 20 mm in longth. The joint has a standard taper 1:10, any two joints (male and female) with the same outside diameter (A)can fit into each other ,no matther how lenght the joints are. For example, a 24/40 (US standard size) joint on a condenser will fit into a 24/29 (European standard size)flask but the ground glass joint will protrude (40 - 29) 11mm into the flask.

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Protection of Products in Transit

  1. Check the integrity of the product before packaging.
  2. Bubble wrap tightly around the product.
  3. Fill the space in the packing box with pearl cotton.

Material: Borosilicate Glass(PYREX Glass)

Silicon content >80%
Strain and Temperature 520℃
Annealing temperature 800℃
Index of refraction 1.47
Transmittance ≧90％
Elastic modulus E 67KNmm-2
Tensile strength 40-120Nmm-2
Processing temperature(104dpas 1220℃
Coefficient thermal expansion (20-300℃) (3.3±0.1)×10-6/K -1
Poisson's ratio μ 0.2
Density（20℃） 2.23g/cm3
Specific heat 0.9Jg-1K-1
Thermal conductivity (20-100℃）1.2Wm-1K-1
Water resistance 1 Level
Acid resistance 1 Level
Alkali resistance 2 Level
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After Sale Service:
1 Insurance Policy: Click to go to the Help Center to view the Insurance Policy
2 The rules apply and summit for receive compensation
3 The conditions of accrual for amount insurance
3 The conditions of accrual for amount insurance
5 Damage to the parcel during international shipping, which resulted in damage to the goods in it
6 Loss of individual goods under international shipment The absence individual goods in the parcel
7 Non-compliance individual goods in color, size, complications Damage to the goods during international shipment
8 Returns Policy: Click to go to the Help Center to view the Returns Policy
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Laboy Glass 25mL Single Neck Round Bottom Boiling Flask Heavy Wall with 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware
Laboy Glass 25mL Single Neck Round Bottom Boiling Flask Heavy Wall with 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

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Product Description

Round-bottom flasks (also called round-bottomed flasks, Flasks, round bottom, or RB Flasks)having spherical bottoms are more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. Because of the spherical bottom, cork rings are needed to keep the round bottom flasks upright,or heated by the water bath ,oil bath or sand bath.When in use, round-bottom flasks are commonly held at the neck by flask clamps on a stand.

The flasks are usually used in heating or boiling a liquid, in distillation as distilling flasks and receiving flasks for the distillate, used as the distilling flasks in rotary evaporators.It is usually used with other jointed lab glassware like glass condenser,separatory funnels,cow receivers.

The round bottom flask has larger heating surface than the flat bottom flask and can be heated evenly.It is usually used in the laboratory operation requiring high temperature and long time heating,or vacuum distillation.

Laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree Celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in Chemistry processes like heating and cooling.

Read more
Read more

US Standard Size Joint Will Fit into European Standard Size Joint

Standard Taper Ground Glass Joints are interchangable.For either frosted, presicon-ground standard taper joints (same size),the inner ground surfaces (male joint) make a good seal with the outer(female joint)). The joint size is described by the form A/B. The first number A represents the outer diameter (OD) in millimeters (mm) at the widest point of the inner (male) joint and the second number B represents the length of the joint. For example, a 14/20 joint is 14 mm wide at the top (the widest part) and is 20 mm in longth. The joint has a standard taper 1:10, any two joints (male and female) with the same outside diameter (A)can fit into each other ,no matther how lenght the joints are. For example, a 24/40 (US standard size) joint on a condenser will fit into a 24/29 (European standard size)flask but the ground glass joint will protrude (40 - 29) 11mm into the flask.

Read more

Protection of Products in Transit

  1. Check the integrity of the product before packaging.
  2. Bubble wrap tightly around the product.
  3. Fill the space in the packing box with pearl cotton.

Material: Borosilicate Glass(PYREX Glass)

Silicon content >80%
Strain and Temperature 520℃
Annealing temperature 800℃
Index of refraction 1.47
Transmittance ≧90％
Elastic modulus E 67KNmm-2
Tensile strength 40-120Nmm-2
Processing temperature(104dpas 1220℃
Coefficient thermal expansion (20-300℃) (3.3±0.1)×10-6/K -1
Poisson's ratio μ 0.2
Density（20℃） 2.23g/cm3
Specific heat 0.9Jg-1K-1
Thermal conductivity (20-100℃）1.2Wm-1K-1
Water resistance 1 Level
Acid resistance 1 Level
Alkali resistance 2 Level
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After Sale Service:
2 The rules apply and summit for receive compensation
3 The conditions of accrual for amount insurance
3 The conditions of accrual for amount insurance
5 Damage to the parcel during international shipping, which resulted in damage to the goods in it
6 Loss of individual goods under international shipment The absence individual goods in the parcel
7 Non-compliance individual goods in color, size, complications Damage to the goods during international shipment
...

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