company tower banner
Evonik Company Logo
SIPERNAT® 28 is a very finely milled, hydrophilic silica. It is primarily used as a thickening or free-flow agent in other applications.

INCI Name: Hydrated Silica

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

Functions: Carrier, Conditioner

CAS Number: 112926-00-8

Chemical Family: Silica

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Agrochemical Functions
Cosmetic Ingredients Functions
Plastics & Elastomers Functions
EC No.

Features & Benefits

Product Features
  • Improved flow properties
  • Offers faster production rates and increased capacity
  • Reduced production downtime and maintenance
  • Improved product quality and consistency
  • Improved package weight accuracy

Applications & Uses

Base Chemicals End Uses


Physical Form
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
pH Value (in 5% water)7-ISO 787-9
Median Particle Size3µm-
Loss on Drying (at 105°C, 2 Hours)5%ISO 787-2
Linseed Oil Absorption220ml/100g-
Carrying Capacity66%-
Bulk Density95kg/m³-
BET Surface Area250m²/g-

Regulatory & Compliance

Chemical Inventories

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.