SodiumStarchGlycolateExtraPure
SODIUM STARCH GLYCOLATE
CAS: 9063-38-1
Molecular Formula: C2H4O3·xNa·x
SodiumStarchGlycolateExtraPure - Names and Identifiers
SodiumStarchGlycolateExtraPure - Physico-chemical Properties
| Molecular Formula | C2H4O3·xNa·x |
| Melting Point | >210°C (dec.) |
| Solubility | Practically insoluble in methylene chloride. It gives a translucent suspension in water. |
| Appearance | White powder |
| Color | White to Off-White |
| Storage Condition | 贮存于阴凉、干燥处，避免日晒、雨淋；有效贮存期12个月。按一般货物运输。 |
| Physical and Chemical Properties | The aqueous solution of sodium carboxymethyl starch will be partially decomposed by bacteria in the atmosphere, reducing the viscosity. It is harder to hydrolyze than ordinary starch. Insoluble in methanol, ethanol and other organic solvents. The pH of 1% aqueous solution is 6.7~7.0. Aqueous solution is more stable in alkali and worse in acid. |
| Use | Used as an additive in the pulp industry, it has the functions of retention, filtration, and enhancement. Also used for surface gluing of paper. |
| Caution | Non toxic, with good biodegradability. Avoid contact with skin and eyes. If accidentally splashed into the eyes, lift the eyelids and rinse with running water or physiological saline. |
SodiumStarchGlycolateExtraPure - Risk and Safety
| WGK Germany | 1 |
| HS Code | 3505100092 |
SodiumStarchGlycolateExtraPure - Standard
Authoritative Data Verified Data
This product is the sodium salt of starch methyl ether produced by the reaction of starch with gas acetic acid under alkaline conditions. The sodium (Na) content should be 80% ~ 2.0% based on the dry product washed with ethanol.
Last Update：2024-01-02 23:10:35
SodiumStarchGlycolateExtraPure - Trait
Authoritative Data Verified Data
- This product is white or off-white powder; Odorless; With hygroscopicity.
- This product is dispersed into a viscous colloidal solution in water, which is insoluble in ethanol or ether.
Last Update：2022-01-01 11:27:34
SodiumStarchGlycolateExtraPure - Introduction
Odorless, tasteless, non-toxic, heat and moisture absorption. Dissolve in water to form a colloidal solution, which is stable to light and heat. Insoluble in ethanol, ether, chloroform and other organic solvents. Its aqueous solution has good viscosity, stability, protective colloidity and film-forming properties, is not easy to decay and mold, is stable under alkaline and weak acid conditions, and will produce precipitation under strong acid conditions. The aqueous solution is more stable in alkali and worse in acid. It generates free acid that is insoluble in water and reduces its viscosity, so it is not suitable for strong acidic foods. When the aqueous solution is heated for a long time above 80°C, the viscosity decreases. This product has similar properties to carboxymethyl cellulose (CMC), with various properties such as thickening, suspension, dispersion, emulsification, bonding, water retention, and colloid protection.
Last Update：2022-10-16 17:30:03
SodiumStarchGlycolateExtraPure - Differential diagnosis
Authoritative Data Verified Data
- take about O.lg of this product, add 5ml of water, shake well, add 1 drop of Iodine test solution, which shows blue color.
- This product shows the flame reaction of sodium salt (General rule 0301).
Last Update：2022-01-01 11:27:34
SodiumStarchGlycolateExtraPure - Exam
Authoritative Data Verified Data
pH
take l.Og of this product, add 100ml of water, shake and disperse, and then determine it according to law (General rule 0631). The pH value should be 5.5~7.5.
sodium nitride
take about 0.5g of this product, precise weighing, set it in a 250ml Erlenmeyer flask, add 150ml of water, shake well, add 1 ml of potassium chromate indicator solution, and use silver nitrate titration solution (0.lmol/L) titration. Each l of silver nitrate titration solution (0.1 mol/L) corresponds to 5.844mg of NaCl. Based on the calculation of the dried product, the content of sodium chloride shall not exceed 6.0%.
sodium glycolate
operation in the dark. Add 5mol/L acetic acid solution and 5ml water to the Beaker, stir for about 15 minutes until sodium glycolate dissolves; Add 50ml acetone and lg sodium chloride, the mixture was stirred to completely precipitate the carboxymethyl starch, filtered, and the filtrate was placed in a 100ml measuring flask, diluted to the scale with acetone, and shaken. The mixture was allowed to stand for 24 hours, and the supernatant was taken as the test solution. Take 0.310g of glycolic acid dried under reduced pressure at room temperature for 12 hours, put it in a 500ml measuring flask, add water to dissolve and dilute it to the scale, Take 5ml for precise measurement, put it in a 100ml measuring flask, 5ml of 5mol/L acetic acid solution was added, allowed to stand for 30 minutes, 80ml of acetone and 1g of sodium chloride were added, and the mixture was shaken, diluted to the mark with acetone, and allowed to stand for 24 hours as a control solution. Take 2.0ml of the test solution and ml of the control solution, put them in 25ml Nessler's colorimetric tubes respectively, heat them in water bath, swing them into acetone, let them cool, add 2,7-dihydroxynaphthalene sulfuric acid solution (take 2, 7-dihydroxynaphthalene 10mg, add sulfuric acid 100ml to dissolve, place it until the color fades, use within 2 days) 20ml, pack, shake, it was heated in a water bath for 20 minutes and cooled. The test solution should not be deeper than the control solution. If necessary, take the above two solutions, according to UV-visible spectrophotometry (General rule 0401),10 minutes, measured at the wavelength of 540nm absorbance, calculation, not more than 2.0%.
loss on drying
take this product and dry it at 130°C for 90 minutes, and the weight loss shall not exceed 10.0% (General rule 0831).
Iron Salt
take 0.50g of this product, place it in the crucible, slowly cauterize until it is completely carbonized, and let it cool; Add 0.5ml sulfuric acid to wet it, and heat it at low temperature until the sulfuric acid vapor is removed, fully ash at 550~600°C, cool, add 4ml of dilute hydrochloric acid, heat in a 60°C water bath for 10 minutes while stirring to dissolve, cool (filter if necessary), move to 50ml Nessler's colorimetric tube, check according to law (General rule 0807), and compare with 0.002% of standard iron solution made by the same method, not deeper ().
Heavy metals
This product l.Og, inspection according to law (General Principles 0821 second law), containing heavy metals shall not exceed 20 parts per million.
Last Update：2022-01-01 11:27:35
SodiumStarchGlycolateExtraPure - Content determination
Authoritative Data Verified Data
Take lg of this product, put it in an Erlenmeyer flask, add 20ml of 80% ethanol, stir and filter; Repeat the operation until the filtrate is checked with silver nitrate test solution to be free of chloride. Take filter residue at 105°C, dry to constant weight, take about 0.45g, precision weigh, put it in a 150ml Erlenmeyer flask, add 50ml of glacial acetic acid, shake, heat and reflux on boiling water bath for 2 hours, let it cool, move to a mL beaker, and wash the Erlenmeyer flask with glacial acetic acid for 3 times, 5ml each time. Wash the flask with the washing solution and use the potentiometric titration method (General rule 0701), with perchloric acid titration solution (0.1 mol/U titration, and the results of the titration were corrected with a blank test. Each l of perchloric acid titrant (0.1 mol/L) corresponds to 2.299mg of Na.
Last Update：2022-01-01 11:27:36
SodiumStarchGlycolateExtraPure - Category
Authoritative Data Verified Data
pharmaceutical excipients, disintegrants and fillers.
Last Update：2022-01-01 11:27:36
SodiumStarchGlycolateExtraPure - Storage
Authoritative Data Verified Data
sealed and stored in a dry place.
Last Update：2022-01-01 11:27:36
SodiumStarchGlycolateExtraPure - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| properties | sodium carboxymethyl starch is white or yellow powder, odorless, tasteless, non-toxic, easy to absorb heat and moisture. Carboxymethyl starch sodium soluble in water to form a colloidal solution, light, heat stability. Insoluble in ethanol, ether, chloroform and other organic solvents. The aqueous solution of this product is more stable in alkali, poor in acid, generate free acid insoluble in water, reduce the viscosity, so it is not suitable for strong acid food. When the aqueous solution is heated at a temperature of 80 ° C. Or higher for a long time, the viscosity decreases. |
| Application | Food-grade sodium carboxymethyl starch (CMS) is a modified starch etherified with carboxymethyl, it is tasteless, non-toxic, not easy to mildew, soluble in water. It has been applied to different foods and has many functions, such as thickening, suspension, emulsification, stability, conformal, film forming, expansion, preservation, acid resistance and health care, and its performance is better than that of carboxymethyl cellulose (CMC). Is the best product to replace CMC. Food-grade carboxymethyl starch sodium is widely used in milk, beverages, frozen foods, fast food, cakes, syrups and other products. In addition, CMS is physiologically inert and has no calorific value, so that the desired effect can also be obtained for the manufacture of food products with low calorific value. Sodium carboxymethyl starch can be used as emulsifier, thickener, dispersant, stabilizer, sizing agent, film forming agent, water retention agent, etc., widely used in petroleum, spinning |
| preparation | 1) preparation: ① put 33.8 parts of sodium hydroxide into an alkaline reactor containing 25 parts of purified water, add 225 parts (90-91%) ethanol, fully dissolve; ② 90-110 parts chloroacetic acid with 125 parts (90-91%) ethanol fully dissolve, suction filter standby; 2) add 91% parts of 90-650 ethanol to the glass-lined reaction tank, add 40-60 parts of sodium hydroxide to fully dissolve, add 550 parts of starch, of catalyst epichlorohydrin, control temperature 38-42 ℃, alkalization for 1 hour, the temperature is recorded every 20 minutes; 3) chloroacetic acid solution and sodium hydroxide solution are sequentially added into the glass-lined reaction tank, the catalyst quaternary ammonium salt is 800ml, the reaction temperature is controlled at 53-56 ℃, the etherification is performed for 6 hours, and the temperature is recorded every 30 minutes; 4) Add 83% parts of 80-700 ethanol to the glass lining reaction tank, detect the content of sodium chloride (≤ 5.8%) and pH value (5.8-7.3), and carry out solid-liquid separation after passing, the filtrate is driven into the recovery tower in time for recycling and reuse; 5) the temperature is controlled at 60-70 ℃ for drying and drying for 3 hours, Shut down to the screening and packaging process; 6) after the product passes the 120 mesh screen, it is the finished product of sodium carboxymethyl starch. |
| Use | thickener; Emulsion stabilizer. Can be used for ice cream (0.2% ~ 0.5%); Prevent bread aging (0.05% ~ 0.2%). A water-soluble anionic macromolecular compound, used in water-based coatings as an additive in suspension, stabilization, warp sizing agent, dyeing aid, etc. |
| production method | The starch is treated with sodium hydroxide to obtain alkali starch, which is then reacted with chloroacetic acid or acrylonitrile. The residual sodium monochloroacetate and sodium hydroxide were washed with sulfuric acid, and then dehydrated and dried to obtain sodium carboxymethyl starch. |
Last Update：2024-04-10 22:30:50
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