Nano‑HA surface area: what to ask for beyond the number

BET surface area is one of the most quoted nano‑HA specs—and one of the easiest to misunderstand. Two materials can share the same BET number while behaving very differently in dispersion, viscosity, and downstream processing. Here’s what to ask for so your spec survives scale-up.

Below is a practical summary for customers who are qualifying materials or running an OEM program. If you need a specific document package, tell us your stage (evaluation vs production) and your target spec.

Why BET alone can mislead

• Agglomeration history: drying and storage can change effective surface exposure.
• Sample prep: degassing conditions and moisture can shift results.
• Measurement context: BET doesn’t tell you how the powder disperses in your real formulation.

If any of the points above maps to your current bottleneck, we can suggest a grade and the minimum documentation set that keeps the project moving.

What to request together with BET

• Particle size distribution (method specified) and a note on dispersion preparation.
• Moisture handling and packaging expectations (nano powders are sensitive).
• A simple dispersion check (your solvent/system) if viscosity/flow is critical.

If any of the points above maps to your current bottleneck, we can suggest a grade and the minimum documentation set that keeps the project moving.

How to compare suppliers fairly

• Ensure the same PSD method and sample prep assumptions.
• Ask for lot-to-lot variability expectations, not just a single “best” number.
• Align on what is “acceptable” for your application before sampling.

If any of the points above maps to your current bottleneck, we can suggest a grade and the minimum documentation set that keeps the project moving.

Practical takeaway

• Treat BET as one input, not the whole story. A spec that includes method + dispersion context reduces surprises.

If any of the points above maps to your current bottleneck, we can suggest a grade and the minimum documentation set that keeps the project moving.

Quick request template

Product(s):
Target PSD range + method:
Application (R&D / pilot / production):
Quantity + timeline:
Documentation needed (typical / full COA / trace elements / other):

Contact: info@kannrybio.com