Selecting Stability Test Chamber

The stability chambers meet International Conference on Harmonization (ICH) guidelines for drug substance and product storage testing. The units are ideal for drug stability studies, shelf-life testing for packaged products, and insect and other large-scale biological research.

Realizing how to determine a stability test chamber requires a clear comprehension of what stability test chambers do, how they relate with the different components or ingredients that go into the item you make and where these items are used.

In this blog we’ll give a few instances of interesting points to consider when determining a stability test chamber and then share proposals on what to search for in this critical equipment.

As a boost or for readers new to the subject here is a response to what makes a stability test chamber.

What is a Stability Test Chamber?

Most stability test chambers resemble a big scientific refrigerator. Just as opposed to keeping contents cool, their capacity is to repeat varieties in temperature, moistness and light over significant period of time. This is critical when pharmaceutical companies, for instance, wish to put up new items for sale to the market.

It has all to do with the recommended shelf life of a pharmaceutical product. In case that you check your medicine cabinet, chances are you’ll discover an "use by" date on prescriptions and migraine medicines.

We’ll concentrate on pharmaceuticals here however the same can apply to numerous items whose performance and reliability quality must be kept up in the numerous climates found the world over.

Who Sets the Rules for Stability Testing?

These examinations are required to be conducted in a planned manner following the rules issued by The International Conference on Harmonization (ICH), the World Health Organization (WHO), the Food and Drug Administration (FDA) or different offices.

The significance of different techniques pursued for stability testing of pharmaceutical items, rules issued for stability testing and different angles related with stability of pharmaceutical items are accessible from a few resources and some are introduced in this post. (1)

Comparable principles identify with veterinarian medical items as portrayed in the Veterinary ICH distribution "Stability Testing of New Veterinary Drug Substances and Medicinal Products (Revision)"

Stability Testing isn’t Easy as it Sounds

One may think each of the one needs to do is place the pill in the chamber and set the parameters to decide to what extent a medication keeps up its power.

Certainly not really.

Here are a couple of the numerous stability tests that can apply to a new item:

• Quality, virtue, strength, and personality which could be expected to change upon storage are picked as stability tests

• Appearance, examine, degradation items, microbiological testing, dissolution, and dampness are standard tests performed on stability test samples • Microbiological tests incorporate sterility, preservative efficacy and microbial count pertinent for example for fluid injectable arrangements.

• Different tests like enantiomeric purity, molecule size and polymorphic form and so forth have also been talked about in ICH guidance Q6A.

• Packaging integrity

• Protection from light

So, the pharmaceutical item may experience a change in chemical stability just as different qualities in appearance, consistency, content consistency, clarity (solution), dampness substance, molecule size, as examples, after some time. (2)

Stability Testing under Several Scenarios

Prior we showed that tests can identify with numerous items whose performance and dependability must be kept up in the numerous climates found the world over.

A medication found in the USA might be transported not exclusively to US medication stores rather to healthcare arrangements somewhere else on the planet where climates might be fundamentally unique.

Not just that – during the shipment to its last destination the medicine may invest time in an atmosphere different in relation to the origin and last destination.

To address this the ICH has partitioned the world into five climate zones to every one of which has been assigned a testing temperature and relative humidity.

For instance, if a drug is delivered in the UK (Zone I) and sent to Egypt (Zone IV) for distribution through Europe (Zones I and II), it would need to be tested in zones I, II and IV. All through the span of the study, the stability of the medication is set up through physical, chemical, biological and microbiological tests. Representative test parameters are appeared in this table: (3)

Climatic Zone Temperatures Humidity

Zone I 21 °C (± 2 °C) 45% RH (± 5%)

Zone II 25 °C (± 2 °C) 60% RH (± 5%)

Zone III 30 °C (± 2 °C) 35% RH (± 5%)

Zone IV 30 °C (± 2 °C) 65% RH (± 5%)

Zone IVb 30 °C (± 2 °C) 75% RH (± 5%) ASEAN Nations

Refrigerated 5 °C (± 3 °C) None

Solidified – 15 °C (± 5 °C) None

So, the takeaway is that if a pharmaceutical is expected for use in different nations it must be given to stability testing recreating the atmospheres of its starting point, destination and intermediate stops. (Consider it of getting vaccinations for every one of the stops on your proposed world visit.)

Presently you can acknowledge there is a more to determining a stability test chamber than simply placing a pill in it and setting a few dials.

Choosing Stability Test Chambers in the U.S.

As noted before stability testing is a difficult part of putting up new drugs to market, and stability test chambers play a major role in this activity. Stability testing gives data on how the formulations respond or react to time (shelf life as example) and environmental factors, for example, temperature and dampness.

FDA Documentation on Abbreviated New Drug Applications

A report distributed by the FDA’s Center for Drug Evaluation and Research (CDER) identifies with stability testing for abbreviated new drug applications (ANDAs). The general proposal is that ANDAs ought to be dealt with no different in contrast to NDA stability suggestions given by International Conference on Harmonization (ICH) stability rules. (4)

Pharmaceutical firms filing ANDAs and wishing to consent to these suggestions may consider buying a stability test chamber.

Getting to the Specifics on Specifying Stability Test Chambers.

We trust this rather long dissertation on what goes into a stability testing activity has been useful. Everything comes down to having an appreciation about what these units do and their contribution to the improvement of safe, compelling pharmaceuticals that hold their potency over the world’s numerous climates.

We’ll be brief in the accompanying recommendations for your thought and have outlined them as

The 3 Cs: Control, Conditioning and Construction

When determining dampness and stability chambers fulfill yourself that the models you consider meet the critical 3 Cs. These are among the highlights found in the Nor-Lake Scientific NSRI arrangement offered by Tovatech in 4 limits from 24 to 80 cubic feet.


A completely programmable logic microprocessor places you in control of the chamber. A solitary multifunction keypad is utilized for every single set points: ramp soak; item and air temperature; alarm and temperature logging; warming/cooling mode; humidity, and alarming for temperature outings, door ajar, power failure, and sensor failure; a real time clock, and service prompts in addition to the password entry syatem.


Chambers must have a uniform dispersion of temperature and moistness all through the interior. The NSRI arrangement does this with a heavy duty refrigeration syatem for quick expulsion of warmth brought about product load or door openings. The working range is 4⁰ to 70⁰C or 5⁰ to 60⁰C with the humidity control. Cabinet warming is by electrically worked heaters factory set (however user programmable) with a pattern temperature to keep the cabinet from surpassing its design limits.


Search for double wall construction with an enamel outside completion (or stainless choice), a stainless interior for simple cleaning, sans cfc free foamed in place insulation for low heat transfer, automatic-closing key lock doors, and a thermostatically managed anti-condensate heater wire for the door gasket.

In addition to the above determination criteria there are various different features that offer some incentive value to test chambers. Here is a sampling:

• Persistent item temperature display

• Remote alarm ability

• Condenser/ compressor run time screen

• Fan engine run time screen

• 24-hour entryway opening counter

• Low battery test

• 18 month parts and labor, 5 year compressor guarantee

Different Suggestions

• Measure first and then purchase. You new unit needs to fit in the space. Permit space for air flow.

• Check the power supply. Preferably you will have a committed circuit outlet with the required amp circuit breaker, and safeguard sees against stumbling the circuit or unplugging the unit.

• Give access to a channel to acknowledge condensate. Caution: Spilled tests may require uncommon disposal procedures.

Enquire with Isotech Technology in case of any queries.

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