Sodium Acid Pyrophosphate (SAPP)

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Sodium Acid Pyrophosphate (SAPP) Sodium acid pyrophosphate (Disodium pyrophosphate) is a buffering and chelating agent, with many food and industrial uses. It is polyvalent, and acts as a Lewis base, so is effective at binding polyvalent cations. It is manufactured by the reaction of sodium carbonate withphosphoric acid. followed by heating of the resulting sodium phosphate to 220 degrees Celsius. Specification: Trisodium Phosphate Anhydrous Identifiers SKU: D9028 Items Spec Food Grade Industrial Grade CAS number: 7758-16-9 HS Code: 2835.22.0000 Purity (as Na2H2P2O7) % ≥ 95 95 Properties % ≤ 0.002 Heavy Metal (as Pb) Molecular formula: Na2H2P2O7 Molar Mass: Arsenic (as) % ≤ 0.0003 221.94g/mol Fluoride (as F) % ≤ 0.005 Density: 1.1-1.3g/cm3 Melting Point: >600 °C 3.5-4.5 3.5-4.5 PH (1% aqueous solution) Appearance: white powder Solubility in Water: Water Insoluble % ≤ 1.0 1.0 11.9 g/100 mL (20°C ) Standard GB 2928-1999 HG 2928-1999 Protection Do not ingest. Do not breathe dust. In case of insufficient ventilation, wear suitable respiratory equipment If ingested, seek medical advice immediately and show the container or the label. Avoid contact with skin and eyes. Keep away from incompatibles such as oxidizing agents, acids. Packing and Storage In double layer bags of net weight of 25 Kg or 50 Kg, store at a cool, dry and well ventilated place. Applications Food uses Sodium acid pyrophosphate is a GRAS substance for food use. It is used in canned seafood to maintain color and reduce purge[clarification needed] during retorting. Retorting achieves microbial stability with heat. It is an acid source for reaction with baking soda to leaven baked goods.In cured meats, it speeds the conversion of sodium nitrite to NO2− by forming the HONO intermediate, and can improve water holding capacity. Disodium pyrophosphate also is found in frozen hash browns and other potato products, where it is used to keep the color of the potatoes from darkening. Sodium acid pyrophosphate is sold as the branded food product "Antelope Powder" by Thermphos and is listed in food ingredients as E450. Other uses In leather treatment, it can be used to remove iron stains on hides during processing. It can stabilize hydrogen peroxide solutions against reduction; it can be used with sulfamic acid in some dairy applications for cleaning, especially to remove soapstone. When added to the scalding water, it facilitates removal of hair and scurf in hog slaughter and feathers and scurf in poultry slaughter. In petroleum production, it can be used as a dispersant in oil well drilling muds. *Data from Wikipedia .

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