Contamination
Use clean tools and avoid returning withdrawn material to the stock bottle.
Current family guidance
Use the label and product documentation first
Current Applied Physics aqueous PSL family pages commonly describe suggested refrigerated storage around 2–8°C and product-specific expiration information. The exact label, certificate and current documentation control for the purchased lot.
Do not freeze unless explicitly permitted. Freezing can disrupt an aqueous suspension and damage the intended particle population.
Receiving
Inspect before release
- Confirm product, part number, lot and quantity.
- Inspect the container for leakage, damage or unusual appearance.
- Review shipping-temperature evidence when required.
- Match the certificate and safety documentation.
- Record receipt date and expiration.
- Move the material into the approved storage condition promptly.
Handling
Protect the suspension from avoidable change
Temperature
Minimize unnecessary warming cycles and document excursions.
Mixing
Follow the approved resuspension method before sampling.
Light and environment
Use the product-specific storage and handling instructions.
Lot separation
Do not pool lots without a validated and documented reason.
Open-container history
Track openings, withdrawals and disposition.
Disposal and safety
Use the SDS and local requirements
Follow the current safety data sheet, institutional procedures and applicable disposal requirements. Do not assume that a water-based suspension has no chemical, biological or environmental controls.
Applied Physics technical pathway
Match the standard to the measurement—not the other way around.
Send the instrument, medium, target size, concentration, certificate and packaging requirements to Applied Physics for a technical recommendation.