Calcium dihydrogen phosphate
CAS No.:7758-23-8
Ca (H2PO4) 2 · nH2O, 257.07 (Monohydrate), 234.05 (anhydrous)
Synonyms: monocalcium phosphate, calcium diphosphate, acid calcium phosphate, calcium diphosphate
Physical and chemical properties
Colorless or white crystalline powder, relative density 2.22, hygroscopic, slightly soluble in water (30 ℃, 1.8g/100ml), the aqueous solution is acidic (pH value 3), heated to 105 ℃ to lose crystalline water, and decomposed into metaphosphate at 203 ℃.
Phosphoric acid reacts with calcium hydroxide or calcium carbonate, cools to 0 ℃, and crystallizes after filtration; Or by reacting phosphate ore (calcium orthophosphate) with hydrochloric acid.
Toxicological basis
① ADI: MTDI 70mg/kg (BW) (based on total phosphorus from various sources, FAO / WHO, 1994).
②GRAS： FDA-21 CFR 181.29，182.1217，182.5212，182.6215.
Application
Water retention agent, bulking agent, acidity regulator, stabilizer, coagulant, and anti-caking agent
GB 2760-2014 stipulates that it is used for milk and dairy products (except the varieties involved in 01.01.01, 01.01.02, and 13.0; it can be used alone or in combination, and the maximum amount is calculated by phosphate), cream (it can be used alone or in combination, and the maximum amount is calculated by phosphate), water oil fat emulsion products (it can be used alone or in combination, and the maximum amount is calculated by phosphate), fat emulsion products other than 02.02, Including mixed and/or flavored fat emulsion products (can be used alone or in combination, the maximum amount is calculated by phosphate), frozen drinks (except 03.04 edible ice;
can be used alone or in combination, the maximum amount is calculated by phosphate), canned vegetables (can be used alone or in combination, the maximum amount is calculated by phosphate), cocoa products Chocolate and chocolate products (including cocoa butter substitute chocolate and products), candy (can be used alone or in combination, with the maximum amount of phosphate), wheat flour and its products (can be used alone or in combination, with the maximum amount of phosphate), raw wet noodle products (such as noodles, dumpling skins, wonton skins and Shaomai skins; can be used alone or in combination, with the maximum amount of phosphate) Batter (such as batter used for fish and poultry meat), wrapping powder, frying powder (can be used alone or in combination, the maximum amount is calculated by phosphate, and the amount can be increased according to the coating rate), miscellaneous grain powder (can be used alone or in combination, the maximum amount is calculated by phosphate), edible starch (can be used alone or in combination, the maximum amount is calculated by phosphate), ready to eat grain, Including rolled oats (tablets) (can be used alone or in combination, the maximum use amount is calculated by phosphate), convenient rice flour products (can be used alone or in combination, the maximum use amount is calculated by phosphate), frozen rice flour products (can be used alone or in combination, the maximum use amount is calculated by phosphate), prefabricated meat products (can be used alone or in combination, the maximum use amount is calculated by phosphate) Cooked meat products (can be used alone or in combination, the maximum use amount is calculated by phosphate), frozen aquatic products (can be used alone or in combination, the maximum use amount is calculated by phosphate), frozen surimi products (including fish balls, etc.; can be used alone or in combination, the maximum use amount is calculated by phosphate), heat set egg products (such as egg yolk cheese and Songhua egg sausage; can be used alone or in combination, the maximum use amount is calculated by phosphate) Beverages (except 14.01 packaged drinking water; can be used alone or in combination, the maximum use amount is calculated by phosphate; solid drinks can be used by dilution multiple), jelly (can be used alone or in combination, the maximum use amount is calculated by phosphate;
If used for jelly powder, the maximum use amount is increased by mixing multiple), the maximum use amount is 5.0g/kg; Rice flour (including glutinous rice balls; can be used alone or in combination, with the maximum amount of phosphate), cereal and starch sweets (such as rice pudding and cassava pudding; only for canned cereal sweets; can be used alone or in combination, with the maximum amount of phosphate), prefabricated aquatic products (semi-finished products) (can be used alone or in combination, with the maximum amount of phosphate) Canned aquatic products (can be used alone or in combination, the maximum amount is calculated by phosphate), and the maximum amount is 1.0g/kg;
Milk powder and cream powder (can be used alone or mixed, the maximum amount is calculated by phosphate), flavoring syrup (can be used alone or mixed, the maximum amount is calculated by phosphate), and the maximum amount is 10.0g/kg; Processed cheese (can be used alone or in combination, the maximum amount is calculated by phosphate), and the maximum amount is 14.0g/kg; Other oils and fats or oil products (only for vegetable fat powder;
can be used alone or in combination, the maximum use amount is calculated by phosphate), compound seasonings (can be used alone or in combination, the maximum use amount is calculated by phosphate), the maximum use amount is 20.0g/kg; Cooked nuts and seeds (only fried nuts and seeds; can be used alone or in combination, with the maximum amount of phosphate);
puffed food (can be used alone or in combination, with the maximum amount of phosphate), with the maximum amount of 2.0g/kg; Canned grains (can be used alone or in combination, the maximum amount is calculated by phosphate), other grains products (only frozen potato chips, frozen potato cakes, frozen potato mash, and frozen sweet potato mash;
can be used alone or in combination, the maximum amount is calculated by phosphate), and the maximum amount is 1.5g/kg; Baked food (can be used alone or in combination, the maximum amount is calculated by phosphate), and the maximum amount is 15.0g/kg;
Other solid composite seasonings (only for convenient wet noodle seasoning package; can be used alone or in combination, the maximum amount is calculated by phosphate), and the maximum amount is 80.0g/kg.
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