STaK-Chex® Plus Retics

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

Whole Blood Control

STaK-Chex Plus Retics is a 5-part differential control that monitors all parameters, including reticulocytes and nucleated red blood cells, for the Beckman Coulter® UniCel® DxH 800, UniCel® DxH 600, LH 780/785, LH 750/755, LH 500 and HmX.

The assay contains automated and manual reticulocyte values for all three levels. White blood cell types and reticulocyte percentages vary and are within clinically significant ranges.

Assay value files are available for download (see "Assay Zip Files" below) for popular Beckman Coulter instruments. The vials are barcoded for correct QC file data input.

STak-Chex Plus Retics is available in plastic cap-pierceable vials which allow for autosampling by an analyzer.

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


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

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Manufacturer Instrument
Beckman Coulter HmX
Beckman Coulter LH 500
Beckman Coulter LH 750/LH 755
Beckman Coulter LH 780/LH 785
Beckman Coulter UniCel® DxH™ 600
Beckman Coulter UniCel® DxH™ 800
STaK-Chex Plus Retics Catalog Number
4 x 4.5 mL (4 Low) 225480
4 x 4.5 mL (4 Normal) 225481
4 x 4.5 mL (4 High) 225482
12 x 4.5 mL (12 Normal) 225483
12 x 4.5 mL (4 Low, 4 Normal, 4 High) 225485