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Munich, November 5, 2019 – At the CPhI Worldwide 2019,

Munich-based chemical group WACKER will showcase the

pyrogenic silica grade HDK®

N20P Pharma for the first time. The

product is designed as an excipient for pharmaceutical applications. Even in low amounts, it improves the flow characteristics

of powder blends, absorbs moisture from hygroscopic solids

and serves as a tablet disintegrant. The new grade’s special

feature is its high tap density, which provides tangible logistics

and handling benefits for pharmaceutical manufacturers. CPhI

will take place in Frankfurt, Germany, from November 5 to 7,

2019.

With HDK®

N20P Pharma, WACKER is expanding its range of pyrogenic silicas tailored to pharmaceutical or food applications. The new

product is a compressed version of the HDK®

N20 Pharma grade,

which has been proving its merit as an excipient in the pharmaceutical industry for years.

Both grades are hydrophilic pyrogenic silicas; their surfaces are thus

wettable by water. Apart from the tap density, they possess the same

physical-chemical properties. With a silicon-dioxide content of at 

November 5, 2019 Press Release No. 42 Page 2 of 4

least 99.8 percent, both products are highly pure and meet the

specifications of the European and the US Pharmacopeia.

Pyrogenic silicas are bulky white powders. In the manufacture of the

new HDK®

grade, the flame process, in which the pyrogenic silica is

made, is followed by a compression step. At approximately

100 grams per liter, HDK®

N20P Pharma achieves a tap density that

is slightly more than double that of its uncompressed counterpart.

The high degree of compaction has a positive effect on logistics and

handling of the product. The media used to transport HDK®

N20P

Pharma can now be filled with twice the amount of product. This

halves the number of bags to be transported and thus the volume of

packaging. The packaging-material savings furthermore reduce

environmental pollution. There is also significantly less dust

produced when the bags are emptied and the compressed pyrogenic

silica is processed. Correspondingly less cleaning is required. In

addition, the product is easier to meter due to its compactness.

HDK®

N20P Pharma is used as a processing auxiliary in the

manufacture of pharmaceutical powders, pellets and tablets. The

pyrogenic silica enhances the flow characteristics of powders and

can bind moisture. These effects make pharmaceutical powders

easier to process. HDK®

N20P Pharma furthermore accelerates

tablet disintegration. Amounts of less than one percent are typically

sufficient in order to achieve these effects.

Visit WACKER at CPhI 2019, Booth 120B32. 

November 5, 2019 Press Release No. 42 Page 3 of 4

At this year’s CPhI, WACKER will present the pyrogenic silica HDK®

N20P

Pharma. The new grade’s special feature is its high tap density, which

significantly reduces the volume of packaging. (Photo: WACKER)

Note:

This photos is available for download at:

http://www.wacker.com/presseinformationen

November 5, 2019 Press Release No. 42 Page 4 of 4

For further information, please contact:

Wacker Chemie AG

Media Relations & Information

Florian Degenhart

Phone +49 89 6279-1601

florian.degenhart@wacker.com

www.wacker.com

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The Company in Brief:

WACKER is a globally-active chemical company

WACKER is a globally-active chemical company with some 14,500 employees

and annual sales of around € 4.98 billion (2018).

WACKER has a global network of 24 production sites, 22 technical competence

centers and 50 sales offices.

WACKER SILICONES

Silicone fluids, emulsions, rubber grades and resins; silanes; pyrogenic silicas;

thermoplastic silicone elastomers

WACKER POLYMERS

Polyvinyl acetates and vinyl acetate copolymers and terpolymers in the form of

dispersible polymer powders, dispersions, solid resins and solutions

WACKER BIOSOLUTIONS

Biotech products such as cyclodextrins, cysteine and biologics, as well as fine

chemicals and PVAc solid resins

WACKER POLYSILICON

Polysilicon for the semiconductor and photovoltaic industries