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Features & Details

🧪 CUP-SHAPED GROUND JOINT	Flared funnel-shaped mouth holds water or potassium iodide solution, creating a tight vapor trap.
🔒 #24 GROUND GLASS STOPPER	Precision frosted taper glass stopper prevents volatile iodine and bromine vapors from escaping.
📏 50ML TO 1000ML CAPACITIES	Available in standard analytical volumes for iodometric titrations and chemical assays.
🧪 BOROSILICATE 3.3	Heavy-wall glass resists aggressive oxidizers, boiling acids, and repetitive laboratory washing.

About this item

Product specification

Attribute

Product Specifications

Material & Design Features

Material Construction

Premium GG-17 (High Borosilicate 3.3 Glass)

Mouth Design

Flared “Trumpet” Mouth for liquid sealing

Stopper Type

Precision Ground Glass Stopper

Capacity & Dimensions Chart

Small Volumes (50ml – 150ml)

50ml: Base Dia. 52mm | Total Height 100mm

100ml: Base Dia. 65mm | Total Height 114mm

150ml: Base Dia. 69mm | Total Height 122mm

Medium / Large Volumes (250ml – 1000ml)

250ml: Base Dia. 83mm | Total Height 155mm

500ml: Base Dia. 108mm | Total Height 183mm

1000ml: Base Dia. 129mm | Total Height 230mm

Laboratory Synthesis, Distillation & Volumetric Containment

Iodine Flask, Borosilicate 3.3 Glass with Ground Stopper by Professional Series

Ensuring dependable accuracy during daily operations requires professional equipment engineered to withstand demanding laboratory and industrial environments. The Iodine Flask, Borosilicate 3.3 Glass with Ground Stopper (50ml-1000ml) by Xin Tester provides verified stability, user-friendly operation, and certified safety compliance across standard maintenance protocols. Discover our complete line of diagnostic and testing instruments in the Lab Glassware catalog.

Uniform Heavy-Wall Blown Glass

Engineered with consistent wall thickness to resist vacuum pressure gradients and mechanical bench knocks during daily agitation.

Permanent Ceramic Markings

Fired white/blue ceramic graduations and matte labeling spots resist aggressive wash detergents, acid baths, and ultrasonic cleaning.

💡

Glassware Insight: Borosilicate 3.3 Thermal Expansion

With a thermal expansion coefficient of 3.3×10⁻⁶/K, Class A borosilicate glassware prevents thermal strain fractures when transitioning between boiling baths and cold washes.

Ordering & Model Verification

Verify capacity, joint sizing, and closure type in the product options before completing your order in the right-side buy box.

Related technical collections:
Lab Glassware |
Lab Consumables

Related products:
Boro 3.3 flared-rim Erlenmeyer flask

Use Cases

Chemical Synthesis High Precision Sample Preparation School Science Labs

FAQs

Q1: What is the difference between an iodine flask and a regular conical flask?

A1: An iodine flask is a specialized conical (Erlenmeyer) flask. The key difference is its flared “trumpet” mouth and precise ground glass stopper. This specific design allows you to add a few drops of water or potassium iodide solution into the flared rim, creating a perfect liquid seal that prevents volatile iodine vapors from escaping during titration.

Q2: How do I create a liquid seal during my experiment?

A2: Simply insert the ground glass stopper securely into the neck. Then, carefully pour a small amount of distilled water or relevant solvent into the flared trumpet mouth surrounding the stopper. This liquid acts as an impenetrable barrier for volatile gases trapped inside the flask.

Q3: Can I heat this flask on a hot plate?

A3: Yes. This flask is manufactured from highly durable Boro 3.3 (GG-17) glass. Its exceptionally flat base provides excellent stability and heat transfer, making it completely safe to use directly on magnetic heating stirrers or laboratory hot plates.

Q4: Will the ground glass stopper get stuck?

A4: To prevent the ground glass joint from seizing (getting stuck), ensure both the neck and the stopper are clean. You may apply a very light coating of laboratory stopcock grease to the joint if you plan to store highly basic solutions, though it is usually unnecessary for standard iodometric titrations.

Iodine Flask, Borosilicate 3.3 Glass with Ground Stopper (50ml-1000ml) by Xin Tester

Price range: $11.21 through $26.66

Extra 5% Off with code: welcome5

SIZE

Clear

6–12 Month Warranty

Repair & Refund support available for most products.

Free Worldwide Shipping

Ships within 3 business days.

Taxes & Duties

Buyer responsible for local import fees.

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Technical assistance & video guidance within 24h.