Choosing a vendor for any consumable product used across a business, a fleet, or a client-facing service involves a different set of questions than a one-off personal purchase, and it is worth being deliberate about what actually matters versus what is easy to evaluate on the surface.
Formulation standards matter more than most buyers initially prioritize. Whether a product is genuinely cosmetic-grade, non-toxic, and formulated without parabens or phthalates is not just a marketing claim worth taking at face value. It is worth confirming what documentation actually backs it up, since a vendor who can produce real compliance documentation, ideally a Safety Data Sheet available on request, is operating to a meaningfully different standard than one offering only a label claim.
Regulatory compliance is a related, distinct question worth asking directly. Compliance with both US and European standards specifically indicates a vendor meeting a higher bar than domestic compliance alone, since European fragrance and cosmetic regulation tends to be stricter across several categories.
Consistency of presentation matters especially for anything client-facing. A vendor's product should look and perform the same way at any order size, since inconsistent presentation creates exactly the kind of unpredictability that undermines a business trying to build a reliable, repeatable client experience.
The product itself is only part of what you are actually evaluating. The documentation behind it, the consistency of the experience across the relationship, and the reliability of the partner over time matter just as much as how good the product sample in front of you happens to smell.