SIPERNAT® 50 is a hydrophilic, coarse silica with the highest absorptive capacity and a high surface area. It is capable of transforming any liquid solution, water- or oil-based systems into dry powder concentrates of up to 75%.

INCI Name: Hydrated Silica

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

Functions: Absorbent, Carrier, Processing Aid

CAS Number: 112926-00-8

Chemical Family: Silica, Silicates

Knowde Enhanced TDS

Identification & Functionality

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

Features & Benefits

Agrochemicals Features

Applications & Uses

Base Chemicals End Uses
  • Very well suited for powder defoamer production (carrier silica)
  • Typical applications include rubber and plastics additives.

Typical Applications

  • Plasticizers
  • Blowing agents
  • Antistatic agents
  • Anti-fogging agents


Physical Form
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Tamped Density (Not Sieved)175g/lISO 787-11
Sulfate Content¹max. 1.5%Internal Method
Specific Surface Area (N₂) Multipoint500m²/gISO 9277
Sodium Content¹max. 1%Internal Method
SiO₂ Content³min. 97%ISO 3262-19
Sieve Residue (in 63 µm Alpine)min. 15%ISO 8130-1
pH Value (in 5% water)6ISO 787-9
Particle Size (D50)50µmLaser Diffraction, ISO 13320
Loss on Ignition² (at 1000°C, 2 Hours)max. 6.5%ISO 3262-1
Loss on Drying (at 105°C, 2 Hours)max. 7%ISO 787-2
Iron Content¹max. 400ppmInternal Method
Electrical Conductivity (in 4% water)max. 1200µS/cmISO 787-14
DOA Absorption¹295ml/100gISO 19246
  • 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

Packaging & Availability

Country Availability
Regional Availability
  • North America

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.