Iodine Flask with Ground Glass Stopper, Borosilicate Glass (BORO 3.3)
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Iodine flasks with ground glass stoppers supplied by LabChoice Australia provide a precision engineered vessel for iodometric titrations, redox analysis and quantitative determination of oxidising and reducing agents across analytical, teaching and industrial laboratories. Manufactured from high clarity BORO 3.3 borosilicate glass that complies with ISO 3585 and ASTM E438 Type 1 Class A standards, these flasks deliver exceptional chemical resistance, thermal stability and inertness essential for accurate iodine based titrimetric procedures. Their characteristic wide shoulder and flat base geometry allow efficient mixing and controlled reagent handling during analytical workflows.
Each iodine flask includes a precision ground glass stopper produced in accordance with ISO 383 and ASTM E676 joint specifications, ensuring an airtight seal that prevents evaporation or loss of volatile iodine species during preparation and titration. The stopper fit eliminates atmospheric oxygen interference, supporting reliable analysis of substances such as sulfites, thiosulfate, copper salts, chlorine releasing agents and peroxide forming compounds. The uniform wall thickness and high clarity BORO 3.3 body allow accurate visual monitoring of colour changes, endpoint transitions and reaction behaviour.
Iodine flasks are widely used in food and beverage chemistry, water treatment analysis, environmental testing, pharmaceutical QC and general redox chemistry workflows. Their sealed design is essential for iodometric and iodimetric titrations where precision depends on minimising iodine loss and preventing contamination. The flat base supports stability during swirling and reagent addition, while the wide shoulder assists in effective mixing of analytes with potassium iodide, acid and titrant solutions.
Every iodine flask with ground glass stopper supplied by LabChoice Australia undergoes ISO 9001 aligned quality control inspection. This includes dimensional accuracy checks, stopper taper conformity verification, sealing integrity assessment, thermal shock testing and clarity evaluation. Flasks are further validated for full compliance with ISO 3585 and ASTM E438 performance requirements for borosilicate glass and for ISO 383 or ASTM E676 joint standards. These rigorous assessments ensure stable, accurate and contamination controlled performance for laboratories requiring high precision redox analysis glassware.