Sepiolite -100 mesh - Pansil 100 - natural hydrous magnesium silicate


SKU: RD11937

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Sepiolite clay / Pansil 100

Natural hydrous magnesium silicate

Grade: 100 mesh

Uses: Horticultural products. Poultices for masonary restoration.

Technical Background

Sepiolite is a natural hydrous magnesium silicate.  A clay mineral, structurally it consists of two sheets of SiO4 tetrahedral bonded via oxygen atoms to a central sheet of octahedrally arranged magnesium atoms.

Sepiolite has internal channels called "zeolitic channels" which run the length of its structure and open via pores of varying shapes and dimensions at the surface.  Along the edges of the tetrahedral sheets are silanol (SiOH) groups which can readily hydrogen bond with water and other polar molecules.  The magnesium layer also provides absorption sites.
A highly porous mineral with low bulk density, Sepiolite is an effective absorbent.  At the same time, due to its rigid structure, sepiolite will not swell in the presence of water or other liquids. 
An approximate empirical formula for Sepiolite is:


Typical Properties

Colour Cream

Appearance Free-flowing powder

pH 8.8

Specific Gravity 2.3 g/cm3

Surface Area 240 m2/g (BET, N2)


Specified Properties

Moisture Maximum 10.5 %

Bulk Density 550 – 650 g/l


Sieve Analysis

250 μm Sieve Maximum 4% retained (typical value 2.0%)

125 μm Sieve Maximum 35% retained (typical value 7.1%)

38 μm Sieve Maximum 35% passing (typical value 23.2%)


PLEASE NOTE: This product is not for human or animal consumption. 

Click Here for MSDS Safety Data Sheet

Click Here for Technical data Sheet