Sodium Isobutyl Xanthate (SIBX) >90%

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Sodium Isobutyl Xanthate (SIBX) >90%

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Sodium Isobutyl Xanthate (SIBX) /         XANTATO ISOPROPILICO DE SODIO Flottec SIBX/FloMin C3430/AERO 317

  • Good general purpose collector

Sodium isobutyl xanthate (SIBX) is typically used when the collector needs to be stronger than SEX without compromising too much on selectivity, for instance in some copper-gold, copper-zinc and nickel operations. It is therefore used for flotation of almost all sulphide minerals where high selectivity is not required. It can be successfully applied at flotation of sulphide minerals containing gold, silver or native gold in the process of selective flotation of zinc mineral, after activating of sphalerite or mormolite by copper sulphate.

In some cases, it substitutes PAX (Potassium Amyl Xanthate).

Xanthates in mining


 Xanthates have been the workhorse of sulfide mineral flotation since the 1920’s (Harris 1989), and they represent the largest volume of any sulfide mineral collector. Xanthate collectors are salts consisting of a non-polar hydrocarbon group, which provides the hydrophobicity to a sulphide mineral, pointing outward from the mineral to the solution, and a polar group that adsorbs onto the sulphide mineral surface.



RAW MATERIALS: are Carbon Disulfide, Caustic Soda (Sodium Hydroxide) or Potash (Potassium Hydroxide) and a determined alcohol, which provides it with collecting properties in flotation processes of metallic and polymetallic minerals.


The production of pure xanthates requires pure raw materials and then the reaction must also be driven to completion. This requires sophisticated process design and control of the manufacturing process which, in turn, influence the price and metallurgical efficiency of the product.





Relative Strength

Typical Plant Concentration %

Sodium Ethyl Xanthate /SEX



Sodium Isopropyl Xanthate /SIPX






Sodium Isobutyl Xanthate /SIBX


Potassium Amyl Xanthate /PAX



All Xanthates are water-soluble and are usually fed in as aqueous solutions in a 5 to 20% strength.

These reagents are widely used for all sulfide minerals, with a high tendency to float iron sulfide, except when using depressors. They cannot be used in highly acidic circuits, as they tend to decompose.

Kemcore carries common Xanthate products equivalent or similar to:

Potassium Ethyl Xanthate (PEX)

Aero 303

Potassium Amyl Xanthate (PAX)

Flottec PAX/Flomin C3505/AERO 350

Sodium Ethyl Xanthate (SEX)

Flottec SEX/FloMin C 3200/AERO 325

Sodium Isobutyl Xanthate (SIBX)

Flottec SIBX/FloMin C3430/AERO 317

Sodium Isopropyl Xanthate (SIPX)

Flottec SIPX/Flomin C3330/AERO 343

Sodium n-butyl Xanthate SNBX

FloMin C 3410

Sodium Amyl Xanthate





Our range of modifiers, collectors and frothers are produced in fully integrated world-class facilities in China and Kemcore guarantees a continuous supply to our customers worldwide. 

Advantages of Xanthate.


  1. The least expensive sulfide mineral collector-Inexpensive compared to Specialty Collectors
  2. Easy to manufacture and available in solid pellet form for easy handling
  3. Dosage: in plant environment they’re fed at active concentrations of 5% or less in water.
  4. Very good at recovering in an unselectve manner bulk sulfide minerals, including sulfides.
  5. Can be used with lime to give a pH operating range of 9-12.
  6. Can be used as a sole collector in a sulfide mineral plant.


Plant Operation Tips –

- The sequence of addition of modifiers, collectors and frothers is of great importance, especially when sulphidising agents and other activators and depressants are involved. 

- Flotation is a process that relies heavily on surface chemistry, 
 by adding all of the collectors to the conditioner, a thick, scummy and uncontrollable froth is obtained which yields a low and unmarketable grade concentrate with entrained insoluble minerals. Therefore careful consideration should be taken when selecting reagent-dosing points in the plant so that recovery and grade are optimised.

-When trialling additional or different collectors maintain a visual inspection history of the froth and concentrate in each circuit 

- Data from each shift should be collected over the duration of the trial so that shift recoveries and grades can be determined and to ascertain whether the trial collector is better or worse than the incumbent collector.

View FileSodium Isobutyl Xanthate (SIBX) >90% COA    Size: (1.26 MB)

Sodium Isobutyl Xanthate (SIBX) >90% COA

View FileXanthate SDS    Size: (1.24 MB)

Xanthate SDS

All of the xanthate products (PAX, SIBX, SIPX, SEX-ETC) are classified as dangerous goods, Class 4.2 spontaneously combustible. 

Problems in the handling and use of xanthate have arise when:

• Impure raw materials were used and side reactions occur which do not produce Xanthate, but other unstable compounds.

• The reaction between raw materials (CS2, sodium hydroxide and the alcohol) is not driven to completion and significant amounts of the un-reacted materials are left in the product. Intermediate, unstable thio compounds are also created and may be left in the product.

• The product degrades into CS2 and alcohol, either after manufacture in the solid form or after dissolution before use. 

• Packaging, transport or storage results in contact of the product with air.



  • UN No: 3342
  • Transport Hazard Class: 4.2 Spontaneously Combustible
  • Packing Group: III
  • Proper Shipping Name or: XANTHATES


Safety and Handling:

Suggested PPE 

  • Wear clothing that offers ankle to wrist coverage
  • Wear impervious gloves
  • Wear chemical goggles if a risk of splashing/spray exists
  • Wear respirator if risk of inhalation exists

Safe Practice

  • Use reagents in areas with adequate ventilation 

  • Do not breathe dust/vapour/mist/aerosol. 

  • Avoid contact with skin and eyes. 

  • In case of contact with eyes, rinse immediately with 
plenty of water and seek medical advice. 

  • Wear suitable protective clothing, gloves and eye/face protection 

Download our  Xanthate  msds for more safety and handling information.


  • With thousands of suppliers competing for our business, Kemcore has proven to be the most reliable and consistent import/export company in China, offering quality chemicals at competitive prices. We strive to continue working with them.

    Macheng Macheng

    Senior Buyer

    KS Energy (Pty) Ltd

  • Kemcore’s greatest advantage is understanding our culture, values, and expectations for business transactions, quality, and delivery from the Asian market feeding into Africa. Our business started with trial orders of 20 tons to the current 350 tons per month.

    Mike Peto

    Managing Director

    Sesani EPCM

  • Our import volume of chemicals and other mining accessories stands at $5.65mil/yr. We have significantly increased our market share due to the competitiveness & consistency in quality.

    Menfred Mukumba (MCIPS)

    Supply Chain Manager

    Intrachem Pvt Ltd

  • Kemcore continues to be  instrumental in procuring a complete suite of reagents for  our gold/copper flotation plant . I do not hesitate to recommend Kemcore services for Xanthate, DTP's plant reagent supply, especially when procuring out of China.

    Brienie Dzumbunu

    Metallurgical Superintendent

    Pan African Mining

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