Haimeng study Industrial Co., manufacturer of high-quality, cochineal phone manufacturers aluminum detailing cochineal aluminum CAS number, Shanghai cochineal aluminum latest offer, cochineal aluminum, aluminum prices cochineal red, rouge Red worms aluminum manufacturers latest offer, the addition of Al Carmines, cochineal aluminum suppliers, cochineal aluminum molecular weight. Cochineal aluminum (1390-65-4) traits: 1. This product is red or dark red powder debris with luster. 2. The decomposition temperature of 250 ℃. 3. dissolved in lye. Slightly soluble in water. Almost insoluble in water and acid. Chinese name cochineal aluminum English name Carmine formula C22H20O13 Molecular Weight 492.3864 CAS Registry Number 1390-65-4 EINECS No. 215-724-4 Login Usage: edible red pigment. Cochineal aluminum (1390-65-4) Preparation Methods: water, dilute alcohol solution or alcohol extraction female cochineal (Doctylopiuscoccus), extraction of aluminum hydroxide was added, the precipitate obtained, aluminum and carmine acid molecular ratio 1: 2. Before the need for food pasteurized or otherwise treated to destroy all of Salmonella. Identification Test: 1. Solubility cochineal aluminum ammonium pH3.0 and pH8.5 soluble in water. Cochineal aluminum calcium is very slightly soluble in water pH3.0, pH8.0 soluble in water (OT-42). 2. Color reaction a. With a drop of 10% sodium hydroxide or potassium hydroxide solution formulated as weakly alkaline sample solution should be purple. b. Plus a small piece of sodium dithionite (Na2S2O4) crystallized in an acidic, neutral or alkaline sample liquid should not fade (unlike moss dye). c. Porcelain dish and dried in a small amount of sample, add 1 to 2 drops sufficiently cold sulfuric acid test solution (TS-239) After cooling, the coloration should remain unchanged. d. In the dispersion liquid sample, the test solution with 1/3 volume of hydrochloric acid (TS-115) was acidified, plus pentanol After shaking, washed with an equal volume of 2-pentanol solution to 4 times to remove hydrochloric acid. 1 to 2 times by volume of petroleum ether (boiling point 40 ~ 60 ℃) diluted pentanol, plus a small amount of water and shake to remove pigment. Dropwise addition of 5% uranyl acetate solution, are shaking after each dropping, emerald coloring should appear. 3. Sample taken 333mg, water 44ml, 10% sodium hydroxide solution and aqueous ammonia 0.15ml 0.2ml, mixed, warmed to dissolve into 500ml volumetric flask, and water to volume. This solution 10.0ml draw into a 250ml volumetric flask, water volume and mix. With a suitable spectrophotometer. Water as a blank sample, 1cm in absorption measuring cell, at a wavelength of 520nm and 550nrn due absorption peak, the absorbance at 520nm is not less than 0.30. Limit: 1. GB2760-2002 (g / kg): 0.02 carbonated beverages; sausage, ham, 0.025; pudding snacks, yogurt, candy, sauces, 0.05; ice cream, ice cream, popsicles, 0.025; 0.6 flavored milk; seasoning fried potato chips 1.0 (Carmine acid); fried potato chips 0.1 (Carmine acid), puffed RTE breakfast cereals 0.2. Note: the same color as the pigment mixed use, the amount shall not exceed the amount allowed a single pigment. Solid drinks and high-sugar juice or fruit drinks Nie amount of pigment is added by dilution of the product. 2. FAO / WHO, 1994: After fermentation, the heat-treated yogurt flavored, 20mg / kg. Toxicity: ADI0 ~ 5 (ADI include cochineal ammonium, calcium, sodium, potassium; FAO / WHO, 2001). LD508.89g / kg (mouse, oral). Content Analysis: Weigh a sample of about 100mg, dissolved in 30ml boiling 2mol / L hydrochloric acid, cooling, into 1000ml flask, water volume and mix. With a suitable spectrophotometer to 0.06mol / L hydrochloric acid as a blank sample, the maximum absorption wavelength (at about 494nm) at lcm absorption cell in measuring the absorbance of this solution. Not as absorbance of 0.20 to 0.25, is suitably adjusted by mass, the sample solution separately prepared. As measured by the absorbance of the solution is not between 0.65 to 0.750, you should adjust the quality of the sample and re-measured accurately weighed. Quality Index Analysis: 1. Arsenic see GT-3 method. Dare sample 3.0g, equipped with fixed nitrogen into a ball of 500ml Kjeldahl flask, add 5g of ferrous sulfate and hydrochloric acid 75ml and mix. The flask was connected to nitrogen ball set and a condenser outlet tube includes a straight takeover of a large size, it extends to near the bottom filled with 100ml water 500ml conical flask. Heating Kjeldahl flask, and about 40ml of distillate was collected in a conical flask. The distillate mixture was poured into water and a 600ml beaker, add 20ml bromine water, on a hot plate heated to a volume reduced to about 2ml. 35ml water by means of this residual liquid into 125ml of arsine generator flask (GT-3; A bottle), and then press the CT-3 method for the determination of organic compounds. 2. Ash sample taken approximately 1g, placed in a pre-cooled constant weight by burning and porcelain crucible, burning with a network port lights (red hot) to constant weight. 3. Dilute ammonia insolubles accurately weighed sample pre-dried for about 0.25g, 2.5ml dissolved in dilute aqueous ammonia (160ml concentrated ammonia --TS-14, set the volume to 500ml), diluted to 100ml, the solution should be transparent to clarify microporous glass funnel (American Standard 3) after filtration, rinsed with 0.1% aqueous ammonia after dried to constant weight at 105 ℃. Computational Chemistry Data: 1, a hydrophobic parameter calculating the reference value (XlogP): 0.52, number of hydrogen bond donors: 93, the number of hydrogen bond acceptors: 134, rotatable bond quantity: 35, Number of tautomers: 6006, topological molecular polar surface area (TPSA): 243 Other: if used and stored according to specifications will not break down, no hazardous reactions known to avoid oxides. Storage keep sealed and stored in a cool, dry place, to ensure that the workplace has a good ventilation or exhaust. Pair is slightly water hazards do not allow undiluted product or large quantities to reach ground water, water course or sewage system, without government permission, place material into the surrounding environment. Haimeng study Industrial Co., integrity management, welcomed the new and old customers call to discuss!