ISO 4796-3:2000

Overview

ISO 4796-3:2000 specifies the requirements for laboratory glass aspirator bottles, designed for the delivery and storage of liquid chemicals and reagents in general laboratory use. This standard, part of the broader ISO 4796 series on laboratory bottles, defines the dimensions, types, materials, and construction details to ensure safety, reliability, and compatibility in laboratory environments. These aspirator bottles come with either screw necks or conical necks and are made to accommodate standard stopper fittings and accessories.

Key Topics

• Scope and Purpose
  This part of ISO 4796 covers aspirator bottles - bottles with a low side tube suitable for chemical reagent dispensing. It standardizes bottles with:

  • Screw neck (type ASN)
  • Conical neck (type ACS)
  • Conical neck with interchangeable ground joint (type ACJ)

• Material and Construction
  Bottles are manufactured from borosilicate glass (ISO 3585:1998), ensuring chemical resistance and thermal durability. The glass thickness and uniformity are controlled for safety and performance.

• Dimensions and Capacities
  Nominal capacities range from 0.5L up to 20L. Dimensions and tolerances for height, diameter, and wall thickness are meticulously defined to maintain interchangeability and usability. Key attributes include:

  • Smooth transition radius at the base for stability
  • Reinforced neck rims for secure sealing and to prevent liquid dripping
  • Side tubes positioned approximately 28mm from the base with standard ground joints or screw threads

• Design Features

  • Bottles have bases designed to sit flat without rocking.
  • The side tube includes a standard ground joint or compatible threading per ISO 383.
  • Inner neck surfaces are smooth or precisely ground to fit rubber stoppers or ground-glass stoppers.
  • Optional external plastic coatings provide additional protection and spill containment, compatible with steam sterilization at 135°C.

• Marking and Designation
  Bottles must be marked clearly with the ISO number, nominal capacity, and type, facilitating proper identification and traceability (e.g., "ISO 4796-3 - 2 ACS" for a 2-liter conical neck aspirator bottle).

Applications

ISO 4796-3 aspirator bottles are essential in chemical laboratories, research institutions, and industrial settings that require reliable chemical reagent storage and dispensing solutions. Their precise standardization offers practical benefits such as:

• Chemical Reagent Handling
  Safe delivery and storage of acids, solvents, and other liquid chemicals with resistance to chemical corrosion.

• Laboratory Fluid Transfer
  Enables safe and controlled aspiration and pouring operations, improving efficiency in titrations, preparations, or analytical testing.

• Compatibility with Laboratory Equipment
  Designed for integration with standard ground-glass joints and common stopper systems, ensuring versatility with existing glassware and laboratory setups.

• Durability and Safety
  Resistant to thermal shock and mechanical stress due to borosilicate glass construction and optional protective coatings, reducing breakage risk during daily use.

Related Standards

• ISO 4796-1:2000 – Laboratory glassware – Bottles – Part 1: Bottles with screw neck
• ISO 4796-2:2000 – Laboratory glassware – Bottles – Part 2: Bottles with conical neck
• ISO 383:1976 – Laboratory glassware – Interchangeable tapered ground glass joints
• ISO 3585:1998 – Borosilicate glass 3.3 – Properties and durability

These interconnected standards ensure comprehensive standardization of laboratory bottles and glassware fittings, enhancing interoperability, safety, and laboratory efficiency worldwide.

Adherence to ISO 4796-3 guarantees that laboratory aspirator bottles meet internationally recognized quality and safety benchmarks, making it a critical reference for manufacturers, quality managers, and laboratory professionals focusing on chemical reagent handling and laboratory safety compliance.