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250ml round bottom Nitrogen flasks with PTFE stopcock
Click to enlarge
Home Lab Glassware Kit 250ml round bottom Nitrogen flasks with PTFE stopcock
Mini Value Vacuum Pump for Vacuum Table
Laboratory SHZ-95B Circulating Water Vacuum Pump for rotary evaporator $ 233.29 $ 213.50
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Digital Display Constant Temperature Electric Heating Jacket heating mantle
Digital Display Constant Temperature Electric Heating Jacket heating mantle $ 95.00 $ 91.00

250ml round bottom Nitrogen flasks with PTFE stopcock

$ 13.47 $ 9.20

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SKU: 2251832457918959 Category: Lab Glassware Kit
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Description

Classification: Flask

250ml round bottom Nitrogen flasks with PTFE stopcock

250ml round bottom Nitrogen flasks with PTFE stopcock

The conical flask with clear scale mark is for easy estimation of liquid volume,transparent material, easy to observe internal reaction condition.

Made of borosilicate glass, with good physical strength,sturdy and durable.It has a glass stopper that prevents liquid from evaporating.

1. Borosilicate glass
It is a special glass material with low expansion rate, high temperature resistance, high strength, high hardness, high transmittance and high chemical stability

2. APPROX scale

The beaker in the situation of room temperature or heating, it is easy to make scale fuzzy and inconvenient to experiment. But the APPROX scale is more accurate and durable, and it is not easy to scratche

3. Label

We have convenient ,practical label on our products surface
Borosilicate Glass Boro 3.3

Nitrogen flasks, round bottom (Schlenk Flasks) with PTFE stopcock,250ml

SiO2 Content >80%
Strain Point 520℃
Annealing Point 560℃
Softening Point 820℃
Refractive Index 1.47
Light Transmission (2mm) 0.92
Elastic Modulus 67KNmm-2
Tensile Strength 40-120Nmm-2
Glass Stress Optical Coefficient 3.8*10-6mm2/N
Processing Temperature (104 dpas) 1220℃
Linear Coefficient of Expansion (20-300℃) 3.3*10-6K-1
Density (20℃) 2.23gcm-1
Specific Heat 0.9jg-1K-1
Thermal Conductivity 1.2Wm-1K-1
Hydrolytic Resistance (ISO 719) Grade-1
Acid Resistance (ISO 195) Grade-1
Alkali Resistance (ISO 695) Grade-1
Thermal Shock Resistance Rod 6*30mm 300℃
Shipping & Delivery
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We keeps large stock for fastest delivery

We know how important it is for our customers to get the needed instruments for their work as fast as possible. Therefore, we keep a large stock of in order to be able to quickly set them up in the desired configuration and to dispatch them in shortest possible time, within few days!

Tough Equipment & Tools, Pay Less

  • Premium Tough Quality.
  • Incredibly Low Prices.
  • Fast & Secure Delivery.
  • 30-Day Free Returns.
  • 24/7 Attentive Service.
We are dedicated to providing our customers with tough equipment & tools at incredibly low prices.

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