company tower banner
Evonik Company Logo
SIPERNAT® 35 is a very finely milled, hydrophilic, slightly alkaline silica, used in dry roast hydrophobized defoamer formulations.

Chemical Name: Silica gel, pptd., cryst.-free

CAS Number: 112926-00-8

Chemical Family: Silica

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
CAS No.
112926-00-8
EC No.
601-214-2

Applications & Uses

Base Chemicals End Uses
Applications

SIPERNAT® 35 is particularly well suited for the production of in-situ hydrophobization process and produces a homogeneous result. It is not necessary to add any other catalyst.

Properties

Physical Form
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Tamped Density (Not Sieved)75g/lISO 787-11
Specific Surface Area (N₂) Multipoint170m²/gISO 9277
SiO₂ Content³min. 97%ISO 3262-19
Sieve Residue (in 45 µm Spray)max. 0.1%ISO 3262-19
pH Value (in 5% water)8.6ISO 787-9
Particle Size (D50)9µmLaser Diffraction, ISO 13320
Loss on Ignition² (at 1000°C, 2 Hours)max. 6%ISO 3262-1
Loss on Drying (at 105°C, 2 Hours)max. 7%ISO 787-2
Electrical Conductivity (in 4% water)max. 1200µS/cmISO 787-14
DOA Absorption¹245ml/100gISO 19246
Note
  • ¹ based on original substance
  • ² based on dry substance (2 h/105°C)
  • ³ based on ignited substance (2 h/1000°C)
  • * The Physico-chemical properties are typical values. Specifications on request.

Regulatory & Compliance

Certifications & Compliance

Storage & Handling

Shelf Life
24 months
Storage Conditions

Our silica products are inert and extremely stable chemically. However, due to their high specific surface area, they can absorb moisture and volatile organic compounds from the surrounding atmosphere. Therefore, we recommend storing the products in sealed containers in a dry, cool place, and removed from volatile organic substances. Even if a product is stored under these conditions, after a longer period it can still pick up ambient moisture over time, which could lead to its exceeding the specified moisture content. For this reason, our recommended use-by date is 24 months after date of manufacture. Product more than 24 months old should be tested for moisture content before use in order to make certain that it is still suitable for the intended application.