ISO 24450:2005

Overview

ISO 24450:2005 - Laboratory glassware - Wide-necked boiling flasks is an international standard published by ISO. It establishes the requirements and dimensions for a globally accepted series of wide-necked boiling flasks, used for general laboratory purposes. The standard covers conical flasks, flat-bottom flasks, and round-bottom flasks with wide necks, aiming to enhance compatibility and safety in laboratory environments. For narrower-necked or ground-joint flasks, other standards such as ISO 1773 and ISO 4797 apply.

Key Topics

Scope and Purpose:

• Specifies requirements for wide-necked glass boiling flasks suited for direct laboratory use.
• Ensures interoperability with other laboratory apparatus.
• Focuses on conical, flat-bottom, and round-bottom vessel forms in various standardized capacities.

Material and Construction:

• Requires manufacturing from borosilicate glass 3.3 as per ISO 3585 for enhanced chemical and thermal resistance.
• Prohibits visible defects or internal stress to ensure reliable performance.
• Stipulates precise construction to guarantee flask stability and durability, including:
  • Vertically stable bases for conical and flat-bottom types.
  • Strengthened, circular necks free from excessive flaring.

Dimensional Requirements:

• Details nominal capacities, typically including 50 ml, 100 ml, 250 ml, 500 ml, 1000 ml, and larger sizes for certain flask types (up to 10,000 ml for round-bottom).
• Outlines neck lengths, wall thicknesses, and base dimensions to align with safety and performance standards.
• Allows for approximate volume graduation for conical flasks.

Marking and Identification:

• Mandates permanent, legible marking of nominal volume and maker’s identification.
• Requires a writable area for user labeling.
• Recommends marking with “ISO 24450” for standard reference.

Applications

ISO 24450:2005 is widely adopted across laboratories requiring reliable boiling flasks with enhanced access via wide necks. Typical applications include:

• Sample Preparation: Facilitates easier addition and removal of materials, ideal for tasks needing frequent sample transfer or insertion of stirrers, thermometers, or other equipment.
• Boiling, Mixing, and Heating: The standardized wall thickness and quality material provide resistance to thermal shock and chemical corrosion, crucial in heating and reaction processes.
• Integration with Laboratory Systems: Designed for compatibility with various laboratory setups and apparatus, supporting efficient and safe workflows.
• Research and Education: Used in scientific research, teaching labs, analytical labs, and quality control, ensuring consistent performance and interchangeability of equipment.

Related Standards

To address other flask types and specialized requirements, consult the following ISO standards:

• ISO 1773: Laboratory glassware - Narrow-necked boiling flasks.
• ISO 4797: Laboratory glassware - Boiling flasks with conical ground joints.
• ISO 3585: Borosilicate glass 3.3 - Properties, specifying the material requirements referenced by ISO 24450.

Laboratories and manufacturers referencing ISO 24450:2005 ensure greater consistency in vessel dimensions, safer laboratory practices, and smoother integration with global laboratory workflows. Adhering to this standard supports both operational efficiency and international compatibility in scientific research and industry.