Preserve When Exploding on Raw Material Composition
Background
Compositions can be useful for complex raw materials such as essential oils, for purchased mixtures and bases and for multi-constituent chemicals.
Raw materials include this extra layer of composition information when required to manage regulatory and technical matters. For example to give accurate information about GHS, IFRA and Allergens. Sometimes, when the regulatory scenarios don’t neatly overlap, ‘preserve when exploding’ can be used as an extra manipulation, so the right answers are always obtained in each regulatory distinct scenario.
Regulatory Calculations
Regulatory calculations typically use the fully exploded view of a formulation or a raw material as the reference composition to calculate relevant information. For example when preparing a Safety Data Sheet for a formulation, the fully exploded formulation right down to what’s inside raw materials will be used as the basis of the calculation. This is the regulatory composition.
Regulatory Composition of a Raw Material
The regulatory composition of a raw material is what it looks like in an ‘exploded’ form. Example: Lemon Oil is an ingredient used in a formulation. Lemon oil is a ‘physical ingredient’, it physically exists in a bottle, ready to be used. This physical raw material contains a regulatory composition. The regulatory composition of lemon oil has a different purpose – it exists to characterise the important regulatory formula or composition of the lemon oil. As such the regulatory composition might include 70% d-Limonene, 11% beta Pinene and 2% Citral (simplified view for this example).
Preserve when exploding
When you add or modify a raw material composition, you are asked if you want to ‘Preserve when exploding’. The default is No and this is usually the right answer. The default of ‘No’ means explode this raw material in the normal way. So, the regulatory explosion ‘looks inside’ this raw material at the components and ignores the outer layer.
If however, you choose ‘preserve when exploding’ = Yes, this means look inside the raw material AND KEEP the actual raw material too.
Using the Lemon oil example:
If preserve when exploding = No, then the regulatory composition of Lemon oil is 70% d-Limonene, 11% beta Pinene and 2% Citral.
If preserve when exploding = Yes, then the regulatory composition of Lemon oil is 100% Lemon oil PLUS 70% d-Limonene, 11% beta Pinene and 2% Citral.
The effect of this on a GHS calculation is that GHS hazards for 100% Lemon oil PLUS 70% d-Limonene, 11% beta Pinene and 2% Citral are counted which would be an over estimate of the hazards present. This helps us understand why preserve when exploding = No is usually the right answer.
When is Preserve when exploding = Yes the right answer?
The key area this is useful in is to correctly count hazards or properties for different regulatory worlds. For example, essential oils can contain different isomers of citral which have their own identities and GHS hazards: neral, geranial and citral – these are individual items from a GHS perspective. In the IFRA regulatory world there is a single IFRA standard for citral, which includes all its isomers. Preserve when exploding allows calculations which consider neral, geranial and citral separately for GHS and as if they are one thing for IFRA.
The way to achieve this is a structure where the components neral, geranial and citral have GHS hazards attached in the normal way, and each of them also have a composition which contains 100% Citral IFRA (with associated IFRA limits) with preserve when exploding = Yes.
Using the Lemon oil example:
Lemon oil is preserve when exploding = No and contains 70% d-Limonene, 11% beta Pinene and 2% Citral
Citral is preserve when exploding = Yes and contains Citral IFRA 100%
So the regulatory composition of Lemon oil is therefore:
70% d-Limonene, 11% beta Pinene, 2% Citral and 2% Citral IFRA.
Please contact us if you would like any additional help or support on this topic.
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