The core problem: white spirit is not a single product
White spirit is a broad commercial category covering a range of hydrocarbon distillate fractions used as industrial solvents, paint diluents, and cleaning agents. What makes white spirit commercially useful, its wide availability and relatively low cost, also makes it a specification challenge. Under the same product name, different grades can differ meaningfully in aromatic content, flash point, distillation range, and density.
This matters because each of those parameters has practical consequences for your process, your formulation, your workers, and your regulatory compliance. A supplier who delivers “white spirit” without further specification is technically fulfilling the order. What arrives may or may not be what your process requires.
The most common procurement error: placing an order for “white spirit”, or “white spirit Type 1”, without specifying flash point, maximum aromatic content, or distillation range. The type number alone does not lock in these parameters with the precision most buyers assume.
What the type designation actually means: and what it does not
White spirit is sometimes referred to using a type classification, Type 0, Type 1, Type 2, Type 3, which reflects the refining route and substance identity of the product, not a straightforward linear scale of aromatic content. The practical meaning of these type designations varies depending on the source, the country of use, and the market convention applied by the producer.
In broad terms, the conventional white spirit grades most commonly traded in the European market, including what is often labelled Type 2, are non-dearomatised hydrocarbon solvents with aromatic content typically in the range of 14 to 25 wt%, depending on the specific grade and producer. They are not dearomatised products. If low aromatic content is a requirement, a type number reference is not a reliable way to specify it.
Practical implication: if a producer or a product datasheet uses different type designations than you expect, or assigns type numbers differently to equivalent products, the resulting confusion can lead to a delivery that meets the stated type but not the actual process requirement. Specifying the underlying parameters directly eliminates that ambiguity.
The flash point dimension: separate from type
White spirit is also categorised by flash point, and this dimension is independent of the type designation. Standard grades typically fall in the 28–42°C flash point range; high-flash grades, where the distillation range is shifted upward, have flash points of 60°C and above. Two products correctly described as “Type 2” from different producers can have meaningfully different flash points depending on how the distillation cut is defined.
Storage classification, transport classification, and site licence conditions in many European countries are directly tied to flash point thresholds. A wrong flash point specification is not a paperwork error, it can have immediate operational and legal consequences.
How white spirit grades differ in practice
The table below gives representative typical ranges for conventional white spirit grades as they are commonly traded in the European market. These are indicative market values, exact properties depend on producer, grade designation, and current product datasheet or Certificate of Analysis (CoA).
| Grade (typical designation) | IBP °C | FBP °C | Flash point °C | Density kg/m³ | Aromatics wt% |
|---|---|---|---|---|---|
| White Spirit 30 | ~137 | ~164 | ~28 | ~774 | ~19 |
| White Spirit 40 | ~155 | ~194 | ~42 | ~788 | ~19 |
| White Spirit 60 | ~184 | ~214 | ~65 | ~804 | ~21 |
| White Spirit 80 | ~204 | ~241 | ~80 | ~820 | ~23 |
| White Spirit 120 (high flash) | ~256 | ~297 | ~120 | ~847 | ~27 |
Typical market ranges for conventional, non-dearomatised white spirit grades. Exact values depend on producer, specification version, and batch, confirm against current PDS and CoA at the point of offer.
The key observation from this table: flash point and boiling range move together as the grade number rises. Aromatic content also rises modestly, but remains in the 19–27 wt% range throughout. These are conventional, non-dearomatised solvents. None of these grades qualifies as a low-aromatic or dearomatised product.
When low aromatic content is actually required
If your process genuinely requires low or minimal aromatic content, for reasons of odour control, worker exposure limits, VOC compliance, or formulation sensitivity, the correct response is not to specify a different white spirit type number. It is to specify a different product category: a dearomatised hydrocarbon fluid.
Dearomatised hydrocarbon fluids, sometimes referred to as D-cuts, dearomatised aliphatics, or low-aromatic hydrocarbon solvents depending on the producer and market, are chemically distinct from conventional white spirit. They cover overlapping boiling ranges, which creates the appearance of interchangeability. In practice, the aromatic content difference is orders of magnitude: conventional white spirit at 14–25 wt% aromatics versus dearomatised grades typically well below 0.1 wt%, and often below 0.01 wt%.
Related guide: if your application requires a dearomatised alternative, understanding how to select the right grade is a separate decision with its own logic. See our guide on dearomatised D-cut grades, how to choose the right one for your application.
The practical question when switching from white spirit to a dearomatised alternative is not simply “which grade matches the boiling range.” Formulation behaviour, evaporation rate, density, solvency profile, and cost will all differ to some degree. Validate the substitution on your specific application, do not assume interchangeability based on overlapping distillation data alone.
What to specify on your purchase order
A robust white spirit purchase order reduces ambiguity and protects you if a delivery does not meet your process requirements. At minimum, specify:
- Flash point minimum: state the minimum flash point required for your storage classification, transport conditions, and process. Do not rely on a grade name or type number to define this.
- Distillation range: IBP and FBP, or a reference to a recognised commercial grade with a published distillation specification. This defines evaporation profile and ensures batch-to-batch consistency.
- Maximum aromatic content: if relevant to your process, worker exposure limits, or VOC compliance. State the actual wt% limit you require, not a type designation.
- Density at 15°C: relevant where you are measuring by volume but need weight-based process consistency.
- Reference product or approved equivalent: naming a recognised commercial reference grade (rather than just a type number) gives both you and your supplier a precise anchor for the specification.
- CoA required with each delivery: confirming actual batch values for flash point, distillation, density, and aromatic content. The SDS is not a substitute: it contains ranges and classification information, not batch-specific data.
If you currently specify only a type number: request the full PDS and a recent CoA from your current supplier for the grade being delivered. Compare those values against your actual process requirements. In many cases, buyers discover that what they have been receiving is technically compliant with the order but not with the process.
What goes wrong when white spirit is underspecified
The consequences of underspecification are rarely dramatic. More often, they are subtle and cumulative, which is part of what makes them commercially costly.
- Inconsistent drying time or open time: caused by flash point or distillation range variation between batches or suppliers.
- Surface finish or adhesion issues: solvency profile varies with aromatic content; switching between high and low aromatic grades without validation affects resin behaviour.
- Regulatory non-compliance: if your SHE assessment or VOC compliance is based on a specific aromatic content that the delivered product does not meet.
- Storage and transport classification errors: if flash point differs from what your risk assessment assumed.
- Reformulation cost when grades are discontinued or reformulated: buyers who specified by type number rather than by underlying properties have limited recourse when a product changes.
Summary: the practical takeaways
- White spirit is a broad category, not a single product. Grade designations and type numbers do not define all commercially relevant properties with sufficient precision for most industrial applications.
- Conventional white spirit, across all commonly used grades, is a non-dearomatised product with significant aromatic content, typically in the range of 14–27 wt% depending on grade.
- Flash point varies across the white spirit range and must be specified independently of any type designation for storage, transport, and process compliance.
- If low aromatic content is a genuine process requirement, specify a dearomatised product category, not a white spirit type number.
- On the purchase order, specify flash point, distillation range, maximum aromatic content, density, and reference product. Request a CoA with every delivery.
- A procurement conversation that starts from the actual process requirement, rather than from a grade name, is far more likely to deliver a product that performs as expected.
Discuss a specific specification
Send a specification or an application description
If you are evaluating a white spirit grade or a dearomatised alternative and want to discuss the specification against your application, send an enquiry with your flash point, aromatic content and distillation range requirements. The enquiry will be reviewed and, where it fits the network, forwarded to a supplier operating in the relevant category.
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