Sodium chlorite, Unstabilized
SODIUM CHLORITE
CAS: 7758-19-2
Molecular Formula: ClNaO2
Sodium chlorite, Unstabilized - Names and Identifiers
| Name | SODIUM CHLORITE |
| Synonyms | UN1496 textile Textone Textile HSDB 733 Alcide LD CCRIS 1426 Neo Silox D SODIUM CHLORITE UNII-G538EBV4VF Chlorite sodium Scentrex? DTS 1.05 sachet Sodium Chlorite, Anhydrous Chlorous acid, sodium salt Sodium chlorite, Unstabilized EPA Pesticide Chemical Code 020502 Sodium chlorite [UN1496] [Oxidizer] |
| CAS | 7758-19-2 |
| EINECS | 231-836-6 |
| InChI | InChI=1/ClHO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1 |
Sodium chlorite, Unstabilized - Physico-chemical Properties
| Molecular Formula | ClNaO2 |
| Molar Mass | 90.44 |
| Density | 2.5 g/cm3 |
| Melting Point | 190°C (dec.) |
| Water Solubility | 39 g/100 mL (17 ºC) |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Powder |
| Color | White |
| Merck | 14,8600 |
| Stability | Stable. Incompatible with phosphorus, sulphur, zinc, ammonia, finely powdered metals, strong reducing agents, acids, organic materials. |
| Sensitive | Hygroscopic |
| Explosive Limit | 7% |
| Physical and Chemical Properties | Character white crystal or crystalline powder. Slightly hygroscopic. soluble in water. |
| Use | Used as bleaching agent, decolorizing agent, cleaning agent, extraction agent |
Sodium chlorite, Unstabilized - Risk and Safety
| Risk Codes | R8 - Contact with combustible material may cause fire R22 - Harmful if swallowed R24 - Toxic in contact with skin R32 - Contact with acids liberates very toxic gas R34 - Causes burns R9 - Explosive when mixed with combustible material R26 - Very Toxic by inhalation R25 - Toxic if swallowed R14 - Reacts violently with water R36/37/38 - Irritating to eyes, respiratory system and skin. R21 - Harmful in contact with skin R50 - Very Toxic to aquatic organisms |
| Safety Description | S17 - Keep away from combustible material. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S50A - S38 - In case of insufficient ventilation, wear suitable respiratory equipment. S36 - Wear suitable protective clothing. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S28 - After contact with skin, wash immediately with plenty of soap-suds. |
| UN IDs | UN 2813 4.3/PG 3 |
| WGK Germany | 2 |
| RTECS | VZ4800000 |
| TSCA | Yes |
| HS Code | 28289000 |
| Hazard Class | 5.1 |
| Packing Group | II |
Sodium chlorite, Unstabilized - Upstream Downstream Industry
| Raw Materials | sulfur dioxide Hydrogen peroxide Hydrogen peroxide Sulfuric acid Sulfuric acid Sodium Chlorate Sodium Chlorate Sodium hydroxide |
| Downstream Products | Chloride Dioxide |
Sodium chlorite, Unstabilized - Nature
Open Data Verified Data
White Crystal or crystalline powder. Slightly hygroscopic. Soluble in water (5 C for 34% J 30 C for 46%). Anhydrous heating to 350t is not decomposed, the general product because of containing water, heated to 180~200 deg C decomposition. The alkaline aqueous solution is stable to light, and the acidic aqueous solution is affected by light to produce explosive decomposition and release chlorine dioxide. Strong oxidant, its oxidation ability is 4~5 times of bleaching powder, is 2~3 times of bleaching powder. Contact with combustibles and mixing of organic matter can cause an explosion.
Last Update：2024-01-02 23:10:35
Sodium chlorite, Unstabilized - Preparation Method
Open Data Verified Data
sodium chlorate is dissolved in water to form a solution, and a chlorine dioxide generator is added. A mixture of sulfur dioxide and air and sulfuric acid are respectively added to the chlorine dioxide generator to react, and the generated chlorine dioxide gas is then reacted with hydrogen peroxide, liquid caustic soda is reacted to produce a solution containing sodium chlorite. The solution was purified by adding an arsenic scavenger and a heavy metal scavenger to the resulting solution. After cooling crystallization, filtration, drying, prepared solid sodium chlorite product.
Last Update：2022-01-01 09:04:03
Sodium chlorite, Unstabilized - Use
Open Data Verified Data
used as a bleaching agent in the food industry. Mainly used for sugar-stained products. The aqueous solution of sodium chlorite has stable bleaching ability under acidic conditions. Citric acid can be added to adjust the pH value to 3~5 before bleaching. Corrosion resistant containers should be used when bleaching, and metal containers should not be used. Japanese regulations limit the use of cherry, Bee bucket, grape and peach. FDA(& sect;186, 1750) regulation is limited to food contact with the paper, the limit of 2000~125 mg/kg.
Last Update：2022-01-01 09:04:04
Sodium chlorite, Unstabilized - Safety
Open Data Verified Data
rat oral LD50:166mg/kg. Woodchucks can cause death for several hours in air containing 45mg/kg chlorine dioxide. It has a stimulating effect on the mucous membrane of respiratory organs and eyes. Should be stored in a cool, ventilated, dry warehouse, but not in the wood structure of the warehouse. Cannot be stored and mixed with flammable products, acids and reducing agents. Pay attention to moisture. Stay away from heat sources and fire types. During transport to prevent rain and sun. When loading and unloading, it should be handled with care to prevent violent collision. Fire, can use water, sand, all kinds of fire extinguishing.
Last Update：2022-01-01 09:04:04
Sodium chlorite, Unstabilized - Reference Information
| pH range of acid-base indicator discoloration | 10 - 11 |
| LogP | -2.7 at 25℃ |
| (IARC) carcinogen classification | 3 (Vol. 52) 1991 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | liquid sodium chlorite is a white or slightly yellow-green aqueous solution, which is alkaline and slightly hygroscopic. Soluble in water, alcohol. Sodium chlorite is relatively stable at room temperature and under normal storage conditions. It is easy to decompose and release chlorine dioxide gas when exposed to acid. With sawdust, organic matter, reducing material contact, impact, friction, easy to explosion or combustion, toxic! |
| Application | sodium chlorite is mainly used in the production of chlorine dioxide, and also used in the bleaching of fibers, fabrics, oils, Pulp, etc, some metal surface treatment and water sterilization. |
| identification test | sodium test (IT-28) was positive. Add dilute hydrochloric acid in 5% of the sample solution, should produce a yellow gas, the liquid is yellow-brown. The red litmus paper turned blue when soaked with 5% sample solution. |
| content analysis | accurately weigh about 1g of the sample, dissolve it with water and make it volume to 250ml. 20ml of the solution was placed in an iodine flask, and 12ml of 1 mol/L sulfuric acid and 25ml of potassium iodide test solution (TS-192) were added. The solution was immediately tamped and left in the dark for 5min, and 0.5ml of starch test solution (TS-235) was added. Titration was carried out with 0.1mol/L sodium thiosulfate solution, and a blank test was carried out at the same time. Each ml of 0.1mol/L sodium thiosulfate solution is equivalent to 2.261mg of sodium chlorite (NaClO2). |
| toxicity | LD50166mg/kg (rat, oral). Chlorine dioxide can occur during use and woodchucks can cause death for several hours in air containing 45mg/kg chlorine dioxide. It has a stimulating effect on the mucous membrane of the respiratory organs and the eyes. ld50166 mg/kg (rat, oral). Chlorine dioxide can occur during use, and woodchucks can cause death for several hours in air containing 45 x 10-6 chlorine dioxide. It has a stimulating effect on the mucous membrane of respiratory organs and eyes. According to Japanese regulations, it is limited to Cherry, Bee bucket, grape and peach. Mainly used for sugar-stained products. The aqueous solution of this product has stable bleaching ability under acidic conditions, so citric acid can be added to adjust the pH value to 3~5 after bleaching. Does not cause tissue embrittlement. When bleaching, corrosion-resistant containers made of wood or polyethylene should be used, and metal containers should not be used. Bleached food must be decomposed or removed before final preparation. This product dust has a stimulating effect on respiratory mucosa, eyes and skin. The solution such as accidental splash into the eyes or splash on the skin, should be immediately washed with water, serious cases quickly sent to the hospital for treatment. LD50 166 mg/kg (Rat oral). Eating 5~6G is life-threatening. Immediately after eating, drink salt water and warm soap water to make it vomit. Production personnel should wear work clothes, protective masks, latex gloves and other labor protection articles to protect the respiratory organs and skin. Production equipment should be closed, workshop ventilation should be good. |
| Use | used for bleaching of pulp, fiber, flour, starch, grease, etc., drinking water purification and sewage treatment, leather hair removal and preparation of chlorine dioxide aqueous solution, etc. used as bleaching agent, decolorizing agent, clearing agent, extraction agent, etc. used for drinking water purification, no residual chlorine odor, treatment of sewage with sterilization, removal of phenol, deodorizing effect. This product is also a highly efficient bleaching agent, used to bleach fabrics, fibers, Pulp, with the characteristics of small damage to the fiber. is a highly efficient bleaching agent and oxidant. Mainly used for pulp, paper and various fibers, such as cotton, hemp, quinone, viscose fiber bleaching, can also bleach sugar, flour, starch, oil and wax. Also used for leather hair removal, surface treatment of some metals, drinking water purification and sewage treatment. It can be used as an extraction agent for the staining of Yin danshilin. used as a bleaching agent in the food industry. sodium chlorite is a new and efficient bleaching agent and oxidizing bactericide. Sodium chlorite is a highly efficient bleaching agent and oxidizing agent. For the bleaching of pulp and various fibers, such as cotton, hemp, Mulberry, quinone, viscose fibers. Can also bleach sugar, flour, starch, ointment, wax and grease. Also used for leather hair removal, surface treatment of certain metals, drinking water purification and sewage treatment. Can also be used for the purification of trace nitric oxide in coke oven gas. |
| production method | industrial production includes hydrogen peroxide method and electrolysis method. Hydrogen peroxide method see sodium chlorite, the difference is to add arsenic removal agent and heavy metal removal agent for solution purification, filtration, removal of arsenic and heavy metals and other impurities. in the hydrogen peroxide method, sodium chlorate was first dissolved in water to form a solution containing 250g/L of sodium chlorate, then a chlorine dioxide generator was added thereto, and then sulfuric acid was adjusted to 4mol/L of H2SO4. Sulfur dioxide and air mixture and 4mol/L H2S04 were added to the chlorine dioxide generator for reaction, respectively, and the generated chlorine dioxide gas was passed into 3 series bubble absorption tower, and 27.5% hydrogen peroxide, 18% ~ 20% liquid caustic soda reaction, the resulting solution contains NaClO2140 ~ 160g/L. After precipitation, the clear solution is a liquid sodium chlorite product. After evaporation concentration to sodium chlorite solution concentration of 350~400g/L, after cooling crystallization, filtration, drying, solid sodium chlorite product. 2NaClO3 + SO2 + H2SO4 → 2C1O2+2NaHSO42C1O2 + 2NaOH + H2O2 → 2NaC1O2 + 2H2O + O2 electrolysis method sodium chlorate was dissolved in water and sulfuric acid to form mixed acid, which contained 260g/L sodium chlorate, the chlorine dioxide generator is added, and then the mixed gas of sulfur dioxide and air (containing 8 ~ 10% of sulfur dioxide) is introduced into the chlorine dioxide generator for reaction, and 15% of the chlorine dioxide gas is passed into the cathode chamber of the electrolytic cell, brine and distilled water were continuously added to the anode chamber for electrolysis to produce a sodium chlorite solution having a sodium chlorite content of about 20%. After removal of traces of free chlorine dioxide, spray drying was carried out at 130 °c. Alternatively, the solid sodium chlorite can be concentrated by evaporation, cooled crystallization, filtered and dried to obtain a final product. 2NaClO3 + H2SO4 + SO2 → 2ClO2+2NaHSO4C1O2 + e → C1O2-2Cl-+ 2e → C12 ↑na ++ ClO2-→ NaClO2 three-compartment type separated on cation exchange membrane by electrolysis in the electrolytic cell, chlorine dioxide gas (content of about 15%, the molar ratio of ClO2: Cl2 is not less than 15: 1) into the cathode chamber, dissolved in solution, at about 30 degrees Celsius from the cathode to obtain chlorite, sodium chloride solution is continuously introduced into the anode chamber, and chlorine ions emit electrons and become chlorine gas to escape. Under the action of direct current electric field, sodium ions pass through the anode film into the cathode chamber and combine with chlorous acid to form sodium chlorite. The content of the solution is 17% ~ 23%, and the finished product is obtained by spray drying after removing trace chlorine dichloride. The hydrogen peroxide method dilutes the raw material chlorine dioxide to about 10% with air, enters the bubbling absorber, condenses LV through the coil, and sends 30% hydrogen peroxide to the absorber, naOH solution (160g/L) was introduced and reacted at 0~2 ℃. After the reaction is finished, filtering, and then the filtrate is vacuum evaporated to 350~400g/L, transferred to the crystallizer, crystallization at -5 ~-10 deg C, the final product was obtained by air drying below 70 °c. |
| category | oxidant |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 165 mg/kg; Oral-mouse LD50: 350 mg/kg |
| explosive hazard characteristics | mixed with reductant, sulfur, phosphorus, etc, friction can burst |
| flammability hazard characteristics | flammable in case of oxidation of organic matter; decomposition of toxic corrosive hydrogen chloride gas |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from acid and combustible materials |
| fire extinguishing agent | water and sand mist |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 02:00:11
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Raw Materials for Sodium chlorite, Unstabilized
Downstream Products for Sodium chlorite, Unstabilized