SODIUM HYDROGEN DIACETATE HYDRATE
CAS: 126-96-5
Molecular Formula: C2H5NaO2
SODIUM HYDROGEN DIACETATE HYDRATE - Names and Identifiers
| Synonyms | SODIUM DIACETATE SODIUM ACETATE BUFFER SODIUM DIACETATE HYDRATE SODIUM HYDROGEN DIACETATE SODIUM ACETATE ACETIC ACID SODIUM ACETATE ACETIC ACID BUFFER SODIUM HYDROGEN DIACETATE HYDRATE |
| CAS | 126-96-5 |
| EINECS | 204-814-9 |
| InChIKey | BHZOKUMUHVTPBX-UHFFFAOYSA-M |
SODIUM HYDROGEN DIACETATE HYDRATE - Physico-chemical Properties
| Molecular Formula | C2H5NaO2 |
| Molar Mass | 84.05 |
| Density | 1.01 g/mL at 20 °C |
| Melting Point | 323-329 °C (lit.) |
| Flash Point | 40°C (104°F) |
| Water Solubility | soluble H2O [MER06]; slightly soluble alcohol; insoluble ether [HAW93] |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | solid |
| Color | Clear colorless |
| Merck | 13,8681 |
| BRN | 3786729 |
| pKa | 4.756[at 20 ℃] |
| PH | 7.0±0.05 (25℃) |
| Storage Condition | room temp |
| Physical and Chemical Properties | White crystal. With the smell of acetic acid. Easy to absorb moisture. Easily soluble in water (1g/m1), releasing 42.25% acetic acid. The Ph value of 10% aqueous solution is 4.5~5.0. Heat to above 150 ℃ for decomposition. Flammable. It has a strong inhibitory effect on spores and molds of heat-resistant bacteria, mesentericus of Bacillus, Bacillus subtilis (B.Subtitis). |
| Use | This product is for scientific research only and shall not be used for other purposes. |
| Caution | Acetic acid, sodium acetate, concentration of 0.006M. |
SODIUM HYDROGEN DIACETATE HYDRATE - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 35 - Causes severe burns |
| Safety Description | S24/25 - Avoid contact with skin and eyes. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S23 - Do not breathe vapour. |
| WGK Germany | 1 |
| RTECS | AJ4375000 |
| HS Code | 29152910 |
SODIUM HYDROGEN DIACETATE HYDRATE - Introduction
Chinese Pharmacopoeia Buffer Part
Last Update：2022-10-16 17:39:13
SODIUM HYDROGEN DIACETATE HYDRATE - Reference Information
| FEMA | 3900 | SODIUM DIACETATE |
| LogP | -3.72 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| molecular compound of sodium acetate and acetic acid | sodium diacetate is a molecular compound of sodium acetate and acetic acid, referred to as SDA, also known as sodium hydrogen diacetate, diacetic acid sodium, Japan is also known as solid acetic acid. The appearance was white crystalline powder with hygroscopicity and slight acetic acid odor. Flammable, soluble in water and ethanol. The toxicity is very low, the oral LD50 of mice is 3.31g/kg, the oral LD50 of rats is 4.96g/kg, and the daily intake (ADI) is 0~15mg/kg. The final metabolites of sodium diacetate in the living body are water and CO2, which will not remain in the human body and have no destructive effect or side effect on humans, animals and ecological environment. Because it is safe, non-toxic, no residue, no carcinogenic, no teratogenic, has been recognized as "O" toxic substances by the United Nations health organization, the United Nations Food and Agriculture Organization (FAO) and approved World Health Organization (WHO) for food, grain, feed mold, preservative. sodium diacetate for grain, food and feed mold has a high inhibitory effect, especially for aflatoxin has a strong inhibitory effect, it penetrates through the microbial cell wall, interfering with the growth of various enzyme systems in cells, it can effectively inhibit more than ten kinds of mycotoxins and E. Coli, such as Aspergillus flavus, Aspergillus niger, toxin fungus, Penicillium corydalis, Aspergillus Glaucus, Aspergillus albicans, etc, listeria, gram-negative bacteria and other bacteria occur, grow and spread, its anti-mold effect is better than the fungicide calcium propionate. Abroad has been a large number of grain, grain, food and feed mold preservation, domestic is still in its infancy. In China, sodium diacetate is a new type of multifunctional green food additive, which is mainly used for preventing mildew, preserving, preserving, flavoring and improving nutritional value of food and food, pickles, snow vegetables, Pickled Mustard Tuber, meat food, fruit juice drinks and other processed foods, is currently alternative to sorbic acid potassium sorbate, benzoic acid sodium benzoate, calcium propionate, sodium propionate, P-lingyl benzoic acid butyl ester, an ideal product for preservatives such as dimethyl fumarate. sodium diacetate needs to be sealed and stored in a cool place below 40 degrees Celsius for sun protection and moisture protection. |
| trait | white hygroscopic crystalline solid, soluble in water and soluble in oil. Odorless or slightly sour. Heated to 150 ℃ above decomposition, flammable. 1g of this product is soluble in about 1mL of water. The pH of the 10% solution was 4.5-5.0. |
| Anti-corrosion and anti-mildew mechanism | the anti-corrosion and anti-mildew effect of sodium diacetate comes from acetic acid, acetic acid molecules have good compatibility with lipid compounds. Acetic acid can penetrate the cell wall (undissociated acetic acid can penetrate the cell wall of mold tissue more effectively than ionized acetic acid), and denature intracellular proteins, thereby, the sterilization effect is achieved. sodium diacetate mainly interferes with the interaction of enzymes by effectively penetrating the cell wall of mold, and inhibits the production of mold, so as to achieve the function of high efficiency anti-mildew and anti-corrosion. Sodium diacetate is a bimolecular salt with short hydrogen bonds in terms of chemical molecular structure, and contains 40% free acetic acid molecules that can be released, which is acidic in aqueous solution, the released acetic acid can penetrate into the cell wall of the mold tissue, interfere with the system of various enzymes in the cell, denature the protein in the cell, inhibit the growth and reproduction of microorganisms, and thus play an antibacterial role. But it has little effect on the lactic acid bacteria and baker's yeast needed in food, which can protect the nutrients of food. This characteristic makes sodium diacetate a very unusual food additive. sodium diacetate has a strong inhibitory effect on fungi (including fungi, molds, bacteria). The single molecule of acetic acid in the molecule can reduce the pH value of the substance, and has good compatibility with the ester compound, so it can penetrate through the cell wall and effectively penetrate into the cells of the fungus tissue, interfere with the interaction of enzymes between cells, promote the denaturation of bacterial proteins, and change the cell morphology and structure, to achieve the purpose of cell dehydration and death, Play the role of antibacterial and antiseptic. Because SDA is a highly effective inhibitor of mold and bacteria, especially for aflatoxin, it can effectively inhibit the human consumption of meat, vegetables, fruits, corn, wheat, the occurrence, growth and spread of more than 10 kinds of common mycotoxins (spores) and 4 kinds of bacterial nuclides in peanuts, grains, beans, bread and other agricultural products. |
| Use | 1. Sodium diacetate is a multifunctional edible chemical. It is mainly used as preservative, fungicide, chelating agent, flavoring agent, PH regulator, preservation agent of meat products in food and feed industry, and is also the main ingredient of compound fungicide 2. This product can be mixed with other flavoring agents and sweeteners. It can be used as a sour agent for food, and can also be used as a fungicide and a food quality improver. Widely used in food, feed, grain and silage anti-mildew additives (mainly from the mold preservation, improve the nutritional value of the role). In the printing and dyeing industry, it is used as an acidifier, a homogenizer, a buffer, a sequestering agent, a rust inhibitor and a fungicide for bread. preservative; Fungicide; Acidity regulator: chelating agent. as a preservative, China's provisions can be used for cereals and ready-to-eat soybean food, the maximum use of 1g/kg. It can also be used as a feed additive chelating agent. as a preservative, China's provisions can be used for cereals and ready-to-eat soybean food, the maximum use of lg/kg. Also useful as feed additives and chelating agents. is a new type of food and feed mold preservative, acid and improver, used in the industrial field as chelating agent, homogenizer and vector agent, etc. sodium diacetate is a multifunctional edible chemical. It is mainly used as preservative, fungicide, chelating agent, flavoring agent, PH regulator, preservation agent of meat products in food and feed industry, and is also the main ingredient of compound fungicide. |
| assay | sodium acetate content a sample of 0.5g (to the nearest 1mg) was dissolved in 50ml of glacial acetic acid. The end point was determined by potentiometric titration with 0.1 mol/L perchloric acid. Per mL of 0.1mol/L perchloric acid corresponds to 8.203mg of sodium acetate (CH3COONa). Free acetic acid accurately weigh about 4g of sample, dissolve in 50m1 water, add phenolphthalein test solution (TS-167) a few drops, with 1mol/L sodium hydroxide titration, each ml 1mol/L sodium hydroxide equivalent to acetic acid (CH3COOH)60.05mg. |
| toxicity | ADI 0-15mg/kg(FAO/WHO,2001). LD50 4.968g/kg (rat, oral) GRAS(FDA,§ 184.1754,2000). |
| usage limit | GB 2760~96(g/kg): cereals and soy foods, fried potato chips, 1g/kg; Puffed food, seasoning, compound seasoning, 10.0 g/kg. FDA,§ 184.1785(1994,%): baked goods, 0.4; Various oils, meat products, gummy, 0.1; Sauces 0.25; Snack food and soup stock 0.05. EEC: provisions can be used for bread, forming chips. |
| production method | acetic acid reaction with sodium carbonate sodium carbonate 5.3g(0.05 mo1) and water 2ml were added to the reaction flask, 12.0g(0.2 mol) of glacial acetic acid was slowly added dropwise, starting with stirring and warming to 40 °c. After the completion of the drop, the reaction was carried out at 80 ° C. For 4H, the crystals were cooled and filtered; The filtrate was concentrated again, the crystals were combined twice, and the white crystals were dried to obtain 13.6g of the product, with a yield of 95.8%. Acetic acid-acetic anhydride reaction with sodium carbonate 9.2g of sodium carbonate was added to 8.4 ml. Acetic anhydride, evenly wet after the batch addition of 13ml of acetic acid. After stirring for a certain time, the mixture was allowed to stand and dried to obtain 24.6g of the product. Sodium carbonate 5.3g(0.05 m01) and 3ml of water can also be put into the reaction flask, stirred and mixed to raise the temperature to 40%, and 6.0g(0.1 mo1) of glacial acetic acid can be added dropwise. And 5.1g(0.05 m01) of acetic anhydride, and the reaction was continued at 70 ° C. For 3H. After cooling to room temperature, the crystals were filtered and the filtrate was concentrated and recrystallized. The crystals were combined twice and dried to give 13.7g of product in 96.5% yield. Acetic acid and sodium acetate gas phase reaction with nitrogen or carbon tetrachloride as flowing medium, Sodium diacetate was prepared by reacting sodium acetate and acetic acid stoichiometrically in a fluidized bed reactor at 20-200 °c. The production capacity of this method is large, but the conditions are strictly controlled, and the acid in the waste gas must be recovered. Reaction of acetic acid with sodium acetate in 45% ethanol 8.2g(0.1 mol) of sodium acetate was added to 5ml of 50% ethanol. After stirring evenly, it was heated to 60 ° C., 6.0g(0.1 mo1) of sodium acetate was added dropwise, and the reaction was continued at 60-80 ° C. For 4 hours. Then it was cooled to room temperature, left to crystallize, filtered to give white crystals, the filtrate was concentrated and recrystallized, and dried to give 13.3g of sodium diacetate, yield 93.7%. (1) acetic acid reacts with sodium carbonate. 5.3g(0.05mol) of sodium carbonate and 2ml of water were added to the reaction flask, the temperature was raised to 40 ° C. With stirring, and 12.0g(0.2mol) of glacial acetic acid was slowly added dropwise. After completion of the dropping, the reaction was carried out at 80 ° C. For 4H, and the crystals were cooled and filtered. The filtrate was concentrated and crystallized again, and the white crystals were combined twice and dried to obtain 13.6g of product, with a yield of 95.8%. (2) acetic acid-acetic anhydride reacts with sodium carbonate. Add 9.4g sodium carbonate to 8.4ml to get acetic anhydride, After uniform wetting, 13ml of acetic acid was added in portions. After stirring for a certain time, the mixture was allowed to stand and dried to obtain 24.6g of the product. Sodium carbonate 5.3g(0.05mol) and 3ml of water can also be put into the reaction flask, stirred and mixed to raise the temperature to 40 ℃, and 6.0g(0.1mol) of glacial acetic acid is added dropwise. And 5.1g(0.05mol) of acetic anhydride, and the reaction was continued at 70 C for 3h after dropping. After cooling to room temperature, the crystals were filtered and the filtrate was concentrated and recrystallized. The crystals were combined twice and dried to give 13.7g of product in 96.5% yield. (3) acetic acid and sodium acetate gas phase reaction. With nitrogen or carbon tetrachloride as flowing medium, sodium acetate and acetic acid are metered in a fluidized bed reactor according to chemical formula, and the reaction is carried out at 20-200 ℃ to obtain sodium diacetate. The production capacity of this method is large, but the conditions are strictly controlled, and the acid in the waste gas must be recovered. (4) reaction of acetic acid with sodium acetate in 45% ethanol. 8.2g(0.1mol) of sodium acetate was added to 5ml of 50% ethanol. The mixture was stirred and heated to 60 °c. The dropwise addition of 6.0g(0.1mol) of sodium acetate was started and the reaction was continued at 60-80 °c for 4H. Then it was cooled to room temperature, left to crystallize and filtered to obtain white crystals, The filtrate was concentrated and recrystallized to give 13.3g of sodium diacetate with a yield of 93.7%. obtained by neutralization of acetic acid with equimolar sodium carbonate, followed by concentration, purification and crystallization. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:05:16
