Basic chromium sulfate is produced from chromate salts by reduction with sulfur dioxide, although other methods exist. The reduction could formally be written:
Na2Cr2O7 + 3 SO2 + H2O Cr2(SO4)3 + 2NaOH
Since 33% of the anion charges are due to hydroxy ions the basicity is 33% (but in tanning jargon it is known as 33% reduced). Products with higher basicities, e.g. 42 or 50% may be obtained by the addition of sodium carbonate, these are often used in combination with sodium formate. The sodium sulfate is often left in the technical product since it is inert with respect to the tanning process. It is important to fully reduce the hexavalent chromium to trivalent since the hexavalent is more likely to cause health problems for tanners and leather consumers.
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.
Supplier: Basic chrome sulphate, chrome sulphate
Supplier: Basic chrome sulphate, chrome sulphate
Basic chromium sulphate, often used in leather tanning process. We are leading Exporter of basic chromium sulphate from India. We have both 23% and 26% grades. Details are as follow: Package: 25kg plastic weaving bag Quantity/fcl: 20mts Non-hazardous goods Appearance: dark green powder
Basic Chromium Sulphate
Supplier: Magnesium sulphate anhydrous, chrome syntam, basic chromium sulphate
Product Character Trivial name: chromium powder, alternate name: basic chromium sulfate . Chemical formula: Cr(OH)nSO0.5(3-n), molecular weight: 165.07, basicity: 33% . Complex mainly with hydrated basic chromium sulphate and sodium sulfate, Green powder, highly soluble in water. Application Used in leather and fur's tanning and retanning. Notice 1. The product is non-hazard goods, but should be stored in a well-ventilated dry cool storehouse. 2. Avoid contacting with eyes and inhaling the dust. 3. Please wear protective gloves, safety glasses and dust mask to avoid dust fog. 4. In case of leakage, neutralize with calcium oxide immediately. [quality standard]: QB/T2413-1998 ItemsType & Standard Chrome Oxide Cr2O3251231221191 Basicity332332332402332 Water Insolubles0.10%max0.10%max0.10%max0.10%max---------- Iron(Fe3+)0.10%max0.10%max0.10%max0.10%max0.10%max Cr6+3ppm3ppm3ppm3ppm3ppm Packing:25kg bag.
Supplier: Chromium compounds like sodium bichromate, basic chromium sulphate, chrome oxide green, chromic acid
Buyer: Soda ash
Supplier: Sodium sulphide, sidium bromnide, sodium thiosulphte, sodium sulphate, basic chrome sulphate, calcium oxide, calcium hydroxide, ammonium sulphate, sodium chlorude, binders, dyes, pigments, sodium thiosulphate, oxalic acid, sodium silicate, wattle(tannac), hypo, G.S. powder
Buyer: Leather chemicals
