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Potassium Ethyl Xanthate (PEX) 90% min

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Potassium Ethyl Xanthate (PEX) 90% min

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    $1,815.50 /ton
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Potassium ethyl xanthate / XANTATO ETILICO DE POTASIO :

Synonyms: Carbonicacid, dithio-, O-pentyl ester, potassium salt (8CI),Carbonodithioic acid,O-pentyl ester, potassium salt (9CI),Xanthic acid, pentyl-, potassium salt(6CI),Amyl potassium xanthate,Potassiumamylxanthate,Potassium n-amylxanthogenate,Potassium pentyl xanthate,Potassium pentyl xanthogenate.

- It is the highest selectivity reagent due to its short carbonate chain. Generally used in complex Ag/Pb or Zinc ores.

- Application of this collector found its place at flotation concentration of copper ores in combination with potassium amyl xanthates. At flotation of oxide minerals of lead and copper, after sulphidation, potassium ethyl xanthate reaches high usage and quality with a bit increased consumption. This collector is

Recommended use in alkali environment (pH>7.0).

 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.

Appearance: White or slightly yellowish pellet

Molecular Weight:160.3

Density:1.558 g/cm3

Boiling Point:120.5 ºC at 760 mmHg

Melting Point:209-214℃

Flash Point:26.7 ºC

Solubility:1090 g/l in water at 20ºC


Incompatible with strong acids, strong bases, strong oxidizing agents.


View FilePotassium Ethyl Xanthate (PEX) 90% min COA    Size: (1.25 MB)

Potassium Ethyl Xanthate (PEX) 90% min 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



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 Potassium Ethyl Xanthate msds for more safety and handling information.

Customer Reviews 2 item(s)

The Kemcore product has been the best for the site to use and their Quality is of the best in the market.
We at ENRC/ERG AFRICA with operations in Zambia and the DRC, has been using Potassium Ethyl Xanthate (PEX) at one our operations, namely Boss mine and have ordered from Kemcore, so far it has been working well on site with excellent results and reports.
Review by Eddie / (Posted on 6/25/2016)
The Kemcore product has been the best for the site to use and their Quality is of the best in the market.
We at ENRC/ERG AFRICA with operations in Zambia and the DRC, has been using Potassium Ethyl Xanthate (PEX) at one our operations, namely Boss mine and have ordered from Kemcore, so far it has been working well on site with excellent results and reports.
Review by Eddie / (Posted on 6/25/2016)

  • 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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