Desiccator Maintenance: How to Extend the Life of Glass and Polypropylene Models

Desiccators are vital for protecting hygroscopic chemicals, dried samples, and calibration weights from atmospheric moisture. Available in both glass and plastic models, they are often overlooked in lab maintenance routines. With proper care, desiccators can last for years, saving costs and maintaining compliance in Australian laboratories.

Why Desiccator Maintenance Matters

Desiccators operate by maintaining a low-humidity environment using silica gel or molecular sieves. Over time, poor handling or neglect can lead to scratches, cracks, or reduced sealing efficiency. For Australian schools, research labs, and QC facilities, regular maintenance extends equipment life and ensures reliable results.

LabChoice Australia supplies BORO 3.3 glass desiccators and polypropylene/polycarbonate models, all designed for durability under laboratory conditions.

Glass vs Plastic Desiccators

Maintenance Best Practices

• Check the Seal: Ensure the desiccator lid and flange are clean and undamaged to maintain an airtight seal.
• Replace Desiccant Regularly: Recharge silica gel by drying in an oven or replace as needed.
• Handle with Care: Always lift glass lids vertically to avoid chipping edges.
• Vacuum Safety: For vacuum desiccators, avoid exceeding safe pressure ratings and check for stress cracks frequently.
• Cleaning: Use mild detergents and avoid abrasive pads that scratch surfaces, especially on plastic models.

Case Study: QC Lab Efficiency

A Brisbane pharmaceutical QC lab extended the service life of its LabChoice BORO 3.3 vacuum desiccators by over five years by adopting routine seal inspections and desiccant recharging schedules. The result: fewer replacements, lower costs, and consistent ISO-compliant storage conditions.

LabChoice BORO 3.3 & PP Advantage

LabChoice Australia supplies both glass and plastic desiccators, providing flexibility for schools, universities, and industry labs. Glass models offer durability and long service life, while polypropylene options are lightweight, affordable, and suitable for teaching environments. Both are backed by LabChoice’s quality assurance, ensuring safe and compliant moisture control.

FAQs

Can polypropylene desiccators be autoclaved?
Yes, but only specific PP models rated for autoclaving — always check specifications.

How often should silica gel be replaced?
Replace or regenerate once colour indicators show saturation, typically every 1–2 weeks in humid climates.

Are glass desiccators safer than plastic?
Glass provides better chemical resistance and visibility, while plastic reduces breakage risk.

Can vacuum desiccators crack under pressure?
Yes. Always follow safe operating pressure guidelines and inspect regularly for stress marks.

📚 References

Standards & Specifications

1. ISO 13120:2019 – Laboratory glassware — Desiccators. International Organization for Standardization.
   https://www.iso.org/standard/73855.html
2. ASTM D1193-06(2018) – Standard Specification for Reagent Water (includes use of desiccators for gravimetric references). ASTM International.
   https://www.astm.org/d1193-06r18.html
3. ASTM E104-02(2012) – Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions. ASTM International.
   https://www.astm.org/e0104-02r12.html

Academic & Safety Guides

American Chemical Society (ACS) – Safe Use of Desiccators in Teaching and Research Laboratories. ACS Safety Resources.
https://www.acs.org/safety

CSIRO – Laboratory Safety Guide – Handling Glass and Plastic Desiccators in Australian Research Labs. CSIRO, Australia.
https://www.csiro.au

University of Melbourne, School of Chemistry – Undergraduate Lab Manual: Storage and Desiccator Use in Chemistry Experiments. University of Melbourne, Australia.