Pharmaceutical Grade Sodium Bentonite


sodium bentonite clayPharmaceutical grade sodium bentonite clay is used in pharmaceutical industries as well as in personal care. It is a high-end product in terms of the price, and is sold in 1MT quantities only, on order, with a bit of wait time.


Product Description


A pharmaceutical grade bentonite conforming to the European Pharmacopoeia (Ph. Eur. 8.2), monograph Bentonit (8.0/0467) and the British Pharmacopeia 2014.


Chemical Analysis (Typical Data)


SiO2        70.0%
Al2O3        16.0%
Na2O        2.8%
MgO        2.7%
Fe2O3        1.3%
CaO        1.1%
K2O        1.0%
LOI        5.0%


Heavy Metals (Typical Data)


Pb        14 ppm
As        7 ppm

Other Properties (Typical Data)

Cation Exchange Capacity    80 – 90 meq / 100g


Product Specification




Identity A    A gelatinous white substance is formed
Identity B    The apparent volume of the sediment is not less than 22ml after 2 hours
Identity C    Gives the reaction of silicates




Alkalinity:   Decolourisation of bluish solution within 5 minutes
Coarse Particles: Max 0.5%
Heavy Metals: Max 50 ppm
Loss on Drying: Max 15%
Microbial Contamination TAMC: 103 cfu/g; max acceptable limit (Ph. Eur. 2.6.12): 2000


Functionality-Related Characteristics


Swelling power with water    See test: Identity B
Sedimentation Volume    The volume of the clear supernatant liquid is not greater than 2ml after 24 hours


For more information or to order, please contact us.