Volumetric Flask, 250mL - Class A - Polypropylene Stopper - White Graduation - Individual Work Certificate - Borosilicate Glass

Name: Volumetric Flask, 250mL - Class A - Polypropylene Stopper - White Graduation - Individual Work Certificate - Borosilicate Glass
Brand: Eisco Labs
SKU: CH1952H
Price: 12.89 USD
Availability: InStock

SKU CH1952H

by Eisco Labs

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Ships from Rochester, NY
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30-Day Return Policy

INDUSTRIAL STRENGTH || Made of high quality, heavy duty, Borosilicate 3.3 glass. Designed for use in professional laboratories, but is ideal for classroom, garage and home use
250ML CAPACITY || Flask has a 250ml capacity, calibrated to contain, and features a single white graduation mark. Fitted with an interchangeable 14/23 polypropylene stopper
CLASS A || Class A tolerance, ±0.15ml as per ISO 1043 standard - Includes individual work certificate
SUPERIOR HEAT & CHEMICAL DURABILITY || Microwavable and autoclavable, with superior chemical durability. Low temperature gradient- can withstand high temperatures & thermal shocks
MANUFACTURED BY EISCO LABS || Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind

250ml capacity volumetric flask made of high quality, heavy duty Borosilicate 3.3 glass. Single, white graduation mark. Includes an interchangeable, 14/23 polypropylene stopper. Class A, tolerance, ±0.15ml as per ISO 1043. Calibrated to contain.
Flask stands 9.5" tall, and has a bottom diameter of 79mm. Neck has a diameter of 18mm.
Autoclavable, with superior chemical durability. Low temperature gradient- can withstand high temperatures & thermal shocks. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.

Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control.
Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.

Material Info

Thermal Properties

Strain Point: 515°C
Annealing Point: 565°C
Softening Point: 820°C
Coefficient of Linear Expansion: 32.5 x 10^-7 / °C
Specific Heat: 0.2
Thermal Conductivity (Cal/cm³°C/Sec): 0.0027

Chemical Durability - Contact

Water distilled at 100°C: 6 hours - 10 mg/m² lost
Water vapour steam at 121°C: 1 hour - 75 mg/m² lost
Acid HCl: 6 hours - 100 mg/m² lost
80% H₂SO₄at 130°C: 12 hours - 140 mg/m² lost
Alkali -1N solution of Na₂CO₃boiling: 6 hours - 4000 mg/m² lost

Chemical Durability - Isotonic Infusion Fluids

NaCl (0.85%) at 121°C: 2.5 hours - 70 mg/m² lost
Glucose (5%) at 121°C: 2.5 hours - 50 mg/m² lost

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About Eisco Labs

Started over 50 years ago as a small, family-owned manufacturing company, Eisco now produces over 6,500 product lines for the science education and scientific research markets. They have headquarters in both India and the US, and serve hundreds of distributors around the world.

Their core products include glassware, physics apparatus, biology models & equipment, and chemistry lab supplies. Products are designed by a team of laboratory professionals and engineers with quality and durability in mind.