Metal materials

Nonferrous metal, Rare metals, Rare And Noble Metal, Metal powder.

Nano materials

Nanometer TiO2 Series, Nanometer SiO2 Series,Nanopowder,Graphene.


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Production of tin nanometric powders by hydrogen DC claret arc evaporation.

About us

Gerhold Chemetals Co., Ltd is a German company founded both in Germany and China in 1997.


Yttrium oxide for sale.

Silver nitrate uses.

Gerhold Chemetals Co., Ltd.

  Gerhold Chemetals Co., Ltd is a German company founded both in Germany and China in 1997, focuses on research and development of Metallic powders, Metal Compounds nano powders. We can customize products according to customers’ special requirements.

  Our technologies are from Elektrotechnik University, Aachen University, München University and Beijing University.


 The advantages of our products:

   1. Uniform particle size 
   2. invariant Shape
   3. High purity, reach 99.999999
   4. Good dispersion


  In worldwide market, Gerhold Chemetals has sold products to more than 50 countries. We will keep on developing and enlarging business by our advantages.

Production method of cobalt hydroxide

Submitted by admin on Fri, 07/12/2019 - 02:28

Cobalt hydroxide chemical formula Co(OH)2. It is a rose-red monoclinic or tetragonal crystal, insoluble in water, slightly amphoteric, insoluble in strong alkali, but soluble in acid and ammonium salt solution. The melting point is 1100-1200 C , which is amphoteric hydroxide.Cobalt hydroxide

Cobalt hydroxide has the following production methods:

Synthesis of Cobalt Acetate

Submitted by admin on Fri, 07/12/2019 - 02:15

Cobalt acetate is a purple-red deliquescent crystal with a slight acetic acid odor. It is heated to 140 C to form anhydrous substance. It is soluble in water, ethanol, dilute acid and amyl acetate. Its relative density is 1.705 and refractive index is 1.542. It has the possibility of carcinogenesis.Cobalt acetate is a purple-red deliquescent crystal

Cautions for the Use of Cobalt Sulfate

Submitted by admin on Thu, 07/11/2019 - 02:38

Cobalt sulfate, rose-red crystal. It is red powder after dehydration, soluble in water and methanol, slightly soluble in ethanol. It is also used in ceramic glaze and paint drier, electroplating, alkaline batteries, cobalt-containing pigments and other cobalt products. It is also used in catalysts, analytical reagents, feed additives, tire adhesives, lithopone additives, etc.

And cobalt sulfate is a dangerous explosive: it is non-flammable, toxic and irritating. The substance and its containers shall be disposed of as hazardous waste.

Preparation of Cobalt Chloride

Submitted by admin on Thu, 07/11/2019 - 02:32

Cobaltous chloride, chemical formula CoCl2. It is pink to red crystal and anhydrous is blue. It is slightly deliquescent and soluble in water, ethanol, ether, acetone and glycerol. Used for analysis reagent, humidity and moisture indicator, ammonia absorbent.

Cubic mesoporous carbon powder

Submitted by admin on Wed, 07/10/2019 - 01:50

Since 1999  et al, Ordered mesoporous carbon materials were synthesized by template MCM-48 for the first time. Ordered mesoporous carbon materials with different structures and morphologies were synthesized successively, such as:Single crystal, spherical, rod, fibrous, thin film, etc.Cubic mesoporous carbon powder

Application of cadmium oxide

Submitted by admin on Tue, 07/09/2019 - 01:45

Chemical formula CdO for cadmium oxide. Green-yellow, reddish-brown or blue-black crystals or powders, insoluble in water, soluble in dilute acids and ammonium salts. Used for silver solder, glass making, electrodes, anti-nematode agents, organic reaction catalysts, ceramic glaze and cadmium plating. CdO smoke is produced when cadmium or its compounds are processed at high temperature.

Nb2O5 Powder

Submitted by admin on Mon, 07/08/2019 - 01:50

Niobium pentoxide is a white powder. is a typical n-type transition metal oxide semiconductor with a band gap of 3.4-5.3 e V, a melting point of 1485 (+5 C) and a relative density of 4.47 g/cm. Niobium pentoxide has high chemical stability. It is insoluble in water and acid (except sulfuric acid and hydrofluoric acid), and can dissolve in alkali metals, carbonates and hydroxides in molten state. Niobium pentoxide is a kind of multi-morphology oxide.