Product introduction:
Molecular formula: Cr3(OHx)(HCOO)y x+y=9 molecular weight: 187.14
Description: dark green crystals or crystalline powder.300-400 decomposition into Cr2O3.
Application: mainly used for tanning leather, mordant dyeing and trivalent chromium plating.And film and photography.It can also be used as chemical reagent, olefin polymerization catalyst, oxidation catalyst, used for latex hardening, drilling slurry, dye industry as complexing agent, electroplating industry with trivalent chromium.
Formula CrO3, relative molecular mass of 99.994, this product is a dark red flakes, melting point 197 (decomposition), specific gravity of 2.70 g/cm3, has the strong oxidizing, deliquescence and highly soluble in water, with organic contact friction can cause burning, poisonous.Packed in sealed in barrel, a barrel in net weight 50 kg, 100 kg or 200 kg (according to customer requirements).
Molecular formula Cr2O3, relative molecular weight 151.99, this product is hexagonal crystal extraction series or amorphous olive green powder, with metallic luster.Specific gravity 5.21, melting point 2266±25, boiling point 4000.Insoluble in water and acid, soluble in hot alkaline bromide solution.Very stable to light, atmosphere, high temperature and corrosive gases, good hiding power, magnetic.
Molecular formula: CrCl3·6H2O molecular weight: 266.45
Properties: dark green monoclinal crystal, specific gravity 1.835, sublimation at 83;Soluble in water and ethanol;Insoluble in ethyl ether, deliquescence.
This product is orange monoclinal crystal, relative vapor density (air =1), melting point () : 180 (decomposition) : 8.7 no moisture absorption, soluble in water and ethanol, toxic, strong oxidant, contact friction with organic matter, impact can cause combustion, explosion.
25KG reinforced woven bag is packed with inner plastic bag.
K2Cr2O7, relative molecular weight 294.18.This product is orange red triclinic plate-like crystal, no moisture absorption;Soluble in water, insoluble in alcohol;Toxic, strong oxidant, contact with organic matter, friction, impact can cause combustion.
25KG and 50KG reinforced woven bags are packed with inner plastic bags.
Technical index: Cr2O3 â?¥20%, 22±1%, 24±1%, 25±1% basalt % : high (45±2)%;PH value (1:10) : 3.4-4.5;Cr6, + 3 PPM or less;Fe 0.1% or less
Product characteristics: adopt sugar reduction process, contain certain amount of mono compound, the composition of chromium complex, the charge distribution is reasonable, the composition is more, the cutting has appropriate mono properties, the permeation is strong, the chromium is evenly distributed in the leather, the absorption is much, the complexation is firm, the leather surface is fine, the leather body is flat, the hand feeling is plump, the elasticity is good.
Magenta crystal, delirious, decomposed when heated to 125.5, melting point 60.Soluble in water, soluble in ethanol, acetone and inorganic acids.Its aqueous solution appears green when heated, and turns reddish purple quickly after cooling.Corrosive and can cause burns.Contact with flammable materials can cause combustion.
USES: used for preparing chrome-containing catalyst, used as coal dyeing agent in printing and dyeing industry, used as glass and ceramic glaze color and corrosion inhibitor.
Physical and chemical properties: purple or purple equiaxed crystal system octahedral crystal, easy to make large particles crystal.The relative density was 1.826(25).Melting point is 89 .When heated to 100, 10 crystal water was lost, and when heated to 400, 12 crystal water was lost and turned into anhydrous substance.Soluble in water, dilute acid, insoluble in alcohol.Dissolved in water as a purple solution, heating to 70 when the green solution, cooling gradually purple.It is easy to absorb moisture and can be weathered in dry air.Molecular formula :KCr(SO4) 2-12h2o purpose: used as tanning agent, mordant and photographic fixing agent.
Packing: in plastic woven bags lined with polythene polythene bags of 25kg net each.
The common name is sodium chromate, molecular formula na2cr2o7.2h2o, relative molecular mass 298.00, the dihydrate is bright orange monoclinal needle-like or small granular crystal, forming copper-brown anhydrous substance after dehydration in 84.6.In the air, it is easily deliquescent and soluble in water, forming an orange solution whose aqueous solution is acidic.In acidic medium, sodium dichromate is a strong oxidant and toxic.25kg, 40kg and 50kg reinforced woven bags are packed with inner plastic bags.
