This product is also licensed for sale in Canada.
STaK-Chex® CE

Whole Blood Control

STaK-Chex offers complete assay values for the 5-part white cell differential available with Beckman Coulter STKS,  MAXM,  HmX and LH 500 instruments.

STaK-Chex is available in plastic cap-pierceable vials which allow for autosampling by an analyzer and is available in low, normal, and high levels.

Streck offers STATS®, a free Interlaboratory Quality Control program for our customers.


  • 105-day closed-vial stability
  • 14-day open-vial stability

Assay value files are available for download (see "Assay Zip Files" below) for the Beckman Coulter LH 500 and HmX instruments. The assay sheets are barcoded for uploading assay values for STKS, MAXM, and HmX. Vials are barcoded for correct QC access.

Manufacturer Instrument
Beckman Coulter HmX
Beckman Coulter LH 500
Beckman Coulter MAXM™
Beckman Coulter STKS™
STaK-Chex Catalog Number
4 x 4.0 mL (4 Low) 225524
4 x 4.0 mL (4 Normal) 225514
4 x 4.0 mL (4 High) 225534
12 x 4.0 mL (12 Normal) 225114
12 x 4.0 mL (4 Low, 4 Normal, 4 High) 225512