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.

Verpackung / Gebinde

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.

Vertrieb & Support

Wacker Chemie AG
Heilbronner Strasse 74
70191 Stuttgart
+49  711  61942-0 (Phone)
+49 711 61942-61  (Fax)

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