Is my substance allowed in the VARIBOX?

Is my substance allowed in the VARIBOX? That is a question we often receive at our Customer Service. A substance may be filled in the VARIBOX if the chemical compatibility of the plastic of the VARIBOX with the substance is verified. This is done by the so-called assimilation of the filling substance to standard liquids. The exact conditions are described in ADR 4.1.1.21.1.

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How do I assimilate a substance?

Assimilation is to be done like this (see also the flow chart in ADR figure 4.1.1.21.1):

1. Determine the UN number and packaging group of the substance
2. Find this UN number in the ADR assimilation list (Table 4.1.1.21.6)
3. If there is more than one line for this UN number, choose the line corresponding to the packaging group, concentration, flashpoint, etc.
4. The chemical compatibility of the substance has been verified if the substance is mentioned here
5. If it is indicated “Rule for collective entries”, apply that rule as described in ADR 4.1.1.21.5

The substance is now assimilated to a standard liquid or a combination of standard liquids. If the IBC has authorization for that standard liquid, the IBC may be used for the substance.

Is my VARIBOX allowed for this standard liquid?

The VARIBOX is allowed for all standard liquids from the ADR! The maximum density permitted per standard liquid may vary, just as the maximum permitted vapour pressure may be different. Make sure that the density and vapour pressure of the substance to be filled does not exceed that for which the IBC is authorised. Check this on the basis of the data of the substance and the authorisation of the IBC. You can find the standard liquids and the maximum density and vapour pressure in the VARIBOX specifications.
In the event that the substance is assimilated to a combination of standard liquids, the lowest density and vapour pressure of the assimilated standard liquids for which the IBC is authorised shall apply.

Can you assimilate a substance consisting of multiple components?

Substances that are a solution, mixture or preparation can also be assimilated. All components of that substance, whether dangerous or non-hazardous, must then be included in the assimilation procedure. Components that are known not to affect polyethene do not need to be taken into account.

What if assimilation is not possible?

If assimilation is not possible according to this method, chemical compatibility must be demonstrated by tests. Sometimes laboratory tests can be sufficient, but more often this goes through tests with IBCs after they have been stored with the substance to be filled. The storage period is usually 6 months at room temperature. After that, a UN drop test, airtightness test, hydraulic test and vibration test are usually done. In case of positive results, the substance may be filled in the IBC.

Couldn’t find your answer in the FAQ is my substance allowed in the VARIBOX?

We know that the safe and reusable VARIBOX IBCs are being used for many different applications in many different markets. Therefore it could be that your question/answer is not included in the support section. If so, please contact our Customer Service, they are glad to help further.

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