HDK® H2000/4

Synthetic, hydrophobic, amorphous silica.


HDK® H2000/4 is a highly efficient free flow additive for electrophotographic toners.


  • medium surface area (BET); medium sized silica particles
  • highly hydrophobic silica by bonded –O-Si(CH₃)₃ units
  • negative tribo chargeability
  • structure modified product
  • defined agglomerate particle size distribution
  • monocomponent magnetic toners
  • monocomponent nonmagnetic toners
  • dual component toners
  • crushed type and polymerization toners
  • application: 0.5 to 3.0 wt%



HDK® H2000/4 is not suitable for pharmaceuticals, food and feed.


Milling and classifying guarantee a narrow particle size distribution (agglomerates) which contributes to an efficient toner blending.


HDK® H2000/4 is offered in following packaging:

  • pallet with paper bags: 15 kg bags


The “Best use before end” date of each batch is shown on the shipping label and the certificate of analysis.
HDK® H2000/4 should be stored in the original packaging in dry storage areas.
Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

Sales and support

Wacker Chemical Corporation
3301 Sutton Road
Adrian, MI 49221-9397
United States
+1  888  922-5374 (Phone)

How can we help you?

  • Do you need help in choosing a product or do you require technical support? If so, please contact our experts.
Ask a question


My media

My favorites

My products