Frequently Asked Questions

What is GHS?

GHS stands for Globally Harmonised System of Classification and Labelling of Chemicals.

As there are different laws worldwide on how to identify the hazardous properties of chemicals and how to communicate them the UN devised a truly universal system in GHS. The aim of the GHS is to have, worldwide, the same criteria for classifying chemicals according to their health, environmental and physical hazards.

GHS will eventually replace COSHH (Control of substances hazardous to health) in the UK, but will not come into effect from 2015 in the EU

As GHS will become globally recognised we put the new pictograms onto our wash bottles to help the end user identify what hazards of each chemical he/she is using, not to fulfil any legislation requirements.

Can I air freight Azlon bottles containing liquids?

Unfortunately the ISTA guidelines are very strict and incorporate testing in 4 key areas.

• Handling/Drop and Impact
• Transport vibration
• Stack loading
• Atmospheric conditions

As a consequence our products are not routinely tested and are therefore not considered as suitable for freight packaging.

Can I autoclave Azlon plastic products?

A red 'A' autoclave symbol is used throughout the Scilabware catalogue to identify autoclaveable products. We define an autoclave cycle as 121°C at 15 psi (1bar) for 20 minutes.

As a general rule only, polypropylene, PTFE, PFA and PMP (TPX) products can be autoclaved. However, it is not recommended to subject volumetricwares (measuring cylinders, flasks etc) to temperatures above 80°C as they can affect the accuracy.

It is important to remove or loosen any caps before autoclaving bottles as the pressure difference can cause implosion.

I am using Azlon bottles for sampling and storage. Do you recommend washing and drying prior to use?

Although we endeavour to keep the bottles contamination free it is not always possible.

As part of "good laboratory practice" it may be advisable to rinse any item with distilled water and allowed to dry prior to use.

Are Azlon bottles manufactured from food grade plastics?

A large proportion of our products are compliant to the following regulations:

• EU Directive 2002/72 relating to plastic materials and articles intended to come into contact with foodstuffs.
• Code of Federal Regulation (CFR), Title 21, Food and Drug Administration (FDA), Part 177.1520 ”Olefin Polymers”, (a) 2 (i) and (c) 2.1 and 2.

Please contact us for further details on specific products.

What is a CAS number and why do you put them on Azlon wash bottles?

CAS is short for the “Chemical Abstract Service” which gives a unique identification number to chemicals (a bit like a car registration number.

Chemicals may have different chemical names (e.g. Isopropanol, Propan-2-ol, isopropyl alcohol) or even brand or generic names, (in this example, Rubbing alcohol) but they only have one CAS number, (67-63-0) making them easer to identify.

As CAS numbers are universally recognised we put them onto our wash bottles to help the end user identify what chemical he/she is using, not to fulfil any legislation requirements.

Can I use Azlon products for in-vitro, in-vivo or medical device applications?

Unfortunately none of our products are IVD marked, validated, has cytotoxicity or biocompatibility data, drug master file reference or USP.

We strongly recommend that you seek a product that has the appropriate marks and validated assurances.

Can you supply a cleanliness certificate for your Azlon bottles?
As our bottles are not manufactured in a clean room environment we can not offer any cleanliness documentation.
We do however suggest that you pre-rinse our general laboratory bottles with distilled water (or other suitable solution) prior to use. Alternatively you may wish to wash the bottles in a laboratory washer on an “analytically clean” cycle to ensure your own cleanliness.
Can I use a plastic beaker on an electric hotplate?

No. Direct heat of any kind can and will melt the polymer.

This is especially important when using PTFE beakers. Although they can be used at temperature up to 260°C, PTFE is known to release fluorine gas at elevated temperatures.

Can I use Azlon beakers in a microwave?

Azlon polypropylene beakers can be used to microwave aqueous solutions e.g. for the preparation of culture media.

Please refer to the physical properties chart in the Scilabware catalogue for more details on which polymers can be safely used in a microwave.

How accurate is plastic volumetric laboratory ware?

Azlon plastic laboratory ware is manufactured to perform with the same level of accuracy as traditional glassware products.

The Azlon range of volumetric lab ware includes class B pipettes (+/-2% total volume at room temperature), volumetric flasks and burettes.

Azlon has several different types of class B measuring cylinders including polypropylene and PMP with molded or printed graduations as well as a range of class A PMP measuring cylinders (+/-1% total volume at room temperature) which remain in tolerance after at least 20 wash cycles and 10 autoclave cycles!

Additional to these products are Azlon beakers which are designed and manufactured to BS5405 Part 1 and ISO 7056.

What chemicals can I use with this polymer?

For specific chemical compatibility with particular polymers, please refer to our chemical resistance of plastics chart in the technical info or the downloads sections of the website.

What kind of detergent should I clean my plastic ware with?

Plastics usually have a smooth non-wetting surface that can be easily cleaned. For this we recommend a low or none alkaline detergent.

Plastics such as polystyrene and polycarbonate are susceptible to attack by alkalis which can impair their strength. In this case we strongly recommend a neutral detergent such as Lipsol.

• DO NOT use abrasive cleaners or scouring pads on any plastic laboratory ware
• DO NOT use alkaline detergents
• NEVER place plastic laboratory ware directly onto hot surfaces i.e. hot plates
• DO check chemical compatibility chart before using cleaning chemicals
• DO keep automatic washer time to a minimum and temperature below 60°C


For further information on safe cleaning of plastics please refer to our technical section.

Can I use PTFE bottles for digestion work?

Although PTFE can withstand the chemicals used, it is not recommended that you use sealed bottles as the gases produced during the digestion or chemical reaction process could cause an increase in pressure, resulting in possible explosion.

Can I gamma irradiate plastics?

It is possible to gamma irradiate plastics, however some polymers such as HDPE and Polypropylene become brittle and discolored after this process.

Other polymers such as polystyrene are safe to be irradiated.

For more information refer to the technical section which indicates which polymers are suitable.