phytic acidNamely alcohol hexaphosphate, commonly known as fertin. The molecular formula is c6h18o2p6, the general formula is 6[opo (OH) 2]6, and the molecular weight is 660.8. Its chemical structure is a positive hexagon composed of six carbon atoms. Each carbon atom is connected with a negatively charged phosphate radical. It has strong chelating ability, close to EDTA, and can chelate with a variety of mineral ions such as magnesium, potassium, calcium, manganese, iron and zinc to form insoluble complexes. Phytic acid (salt) widely exists in plant fruits and seeds. Phytic acid phosphorus accounts for 60%~90% of total plant phosphorus. The phytic acid content of rapeseed meal and concentrated rapeseed protein is 3.0%~9.9%, and the phytic acid content of cottonseed meal is more than 2.9%; The phytic acid content of soybean shelled powder is 1.4%~1.6%, and that of corn, rice, sorghum, wheat and barley is 0.96%~1.17%. Generally, phytic acid is used for keeping fresh and protecting the color of fruits, vegetables and aquatic products. It is also used as a metal rust and corrosion inhibitor.

    Phytic acid has antioxidant and chelating effects. It can be used for antioxidant of fruit and vegetable products, fruit and vegetable juice beverages, edible oils and meat products. The maximum dosage is 0.2g/kg. It can also be used for fresh keeping of shrimp. It can be used appropriately according to production needs, with a residue of 20mg/kg.   It can be used to improve the color of canned aquatic products, fruits, agricultural products, beverages (cool drinks, milk drinks), etc. the dosage is 0.02% ~ 0.2% of the raw material. When making fermented products, adding 0.01% ~ 0.05% of the amount of raw materials can shorten the fermentation time and improve the color and flavor. The final content in the finished product shall be ≤ 0.001% ~ 0.02%. It is also used to prevent boiled shellfish from turning black, fruit juice from fading, crab meat from blue spots, and canned aquatic products from producing magnesium ammonium phosphate glassy crystals.   By China   According to gb-2760-88, it can also be used for fresh keeping, and the residue shall not exceed 20ppm.

    In addition, it can also be used in industry as antirust agent, cleaning agent, explosion-proof agent, anti-static agent, coating, landscape agent, reagent for rare earth metal analysis, etc. Especially in the application of cyanide electroplating solution, phytic acid or sodium phytate is used to replace sodium cyanide for metal surface treatment, which is very attractive.