Organophilic Bentonite Rheology Additive

Organophilic Bentonite Rheology Additive (CAS 1302-78-9, molecular formula Bentonite) is a coatings raw material used by paint, ink and adhesive formulators who need consistent dispersion, opacity and rheology from drum to drum. China Chemicals supplies it at Montmorillonite 90% min in pack sizes from 1 kg through to 500 kg Pallet, so laboratory trial quantities and full production volumes can be sourced from the same specification.

It is also traded as Organoclay, Bentonite Clay, Montmorillonite. Every consignment ships with a batch-specific Certificate of Analysis and the current Safety Data Sheet, and material is stored and picked under stock rotation so you receive product well inside its shelf life.

Typical applications

Anti-settling and anti-sag additive in solvent-borne paint
Thixotrope in adhesives, sealants and greases
Suspension aid in drilling mud and grouting
Rheology control in printing ink
Binder in foundry moulding sand

Technical specification

Chemical name	Organophilic Bentonite Rheology Additive
Synonyms	Organoclay, Bentonite Clay, Montmorillonite
CAS number	1302-78-9
Molecular formula	Bentonite
Appearance	Off-white to cream powder
Montmorillonite	90.0% min
Moisture	3.5% max
Gel strength (6% in toluene)	1500 mPa·s min
Residue on 75 µm	0.5% max
Bulk density	0.35 – 0.50 g/cm³
Ignition loss	30 – 40%

Values above are typical and are confirmed on the Certificate of Analysis issued against each batch. Tighter specifications can be quoted where a process requires them.

Packaging and supply

Available in 1 kg, 5 kg, 25 kg Drum, 500 kg Pallet. Bulk, road tanker and export drum quantities are quoted on request, including FOB and CIF terms for international shipment. Pricing shown is per pack in USD, exclusive of freight and any applicable duties.

Handling and safety

Transport classification: Not regulated · May cause respiratory irritation as dust. Store in the original closed container in a cool, well-ventilated area away from incompatible materials, and handle using appropriate personal protective equipment. Read the Safety Data Sheet in full before use — it is issued with every order and is available on request before purchase.

Supply to industry only. Products are sold for legitimate industrial, laboratory and manufacturing use. We may request end-use details and business registration before releasing an order.