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| CAS No.: | 7758-19-2 |
|---|---|
| Name: | Sodium chlorite |
| Article Data: | 115 |
| Cas Database | |
| Molecular Structure: | |
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| Formula: | NaClO2 |
| Molecular Weight: | 90.4416 |
| Synonyms: | Sodium chlorite (water disinfection byproducts);Chlorous acid,sodium salt;Textone;Alcide LD;Neo Silox D;Chlorite sodium;EPA Pesticide Chemical Code 020502;Textile;Sodium chlorite [UN1496] [Oxidizer];Chlorous acid, sodium salt;Sodium chlorite 7758-19-2; |
| EINECS: | 231-836-6 |
| Density: | 1.28 g/cm3 (20oC) |
| Melting Point: | 190 °C (dec.) |
| Boiling Point: | 112oC |
| Flash Point: | N/A |
| Solubility: | 39 g/100 mL (17 °C) in water |
| Appearance: | white flakes |
| Hazard Symbols: |
 O,  Xn,  T,  T+
|
| Risk Codes: | 8-22-24-32-34-9-26-25-14-36/37/38-21 |
| Safety: | 17-26-36/37/39-45-50A-38-36 |
| Transport Information: | UN 2813 4.3/PG 3 |
| PSA: | 40.13000 |
| LogP: | 0.45190 |
| Conditions | Yield |
|---|---|
| With barium dihydroxide; sodium iodide In water byproducts: Ba(IO3)2; introduction of ClO2 in a soln. of 500g NaOH and 275g NaI at 80°C, addn. of Ba(OH)2, pptn. of Ba(IO3)2, filtration;; regeneration of NaI and Ba(OH)2 from Ba(IO3)2;; | 98% |
| With NaI; Ba(OH)2 In water byproducts: Ba(IO3)2; introduction of ClO2 in a soln. of 500g NaOH and 275g NaI at 80°C, addn. of Ba(OH)2, pptn. of Ba(IO3)2, filtration;; regeneration of NaI and Ba(OH)2 from Ba(IO3)2;; | 98% |
| With sodium perborate In water byproducts: O2, Na2B4O7*10H2O; at 15-35°C in presence of borax;; | 96% |
chlorine dioxide
sodium chlorite
| Conditions | Yield |
|---|---|
| In water 20°C, pH=8.2-9.2, several cycles; mechanism discussed;; 0.6-0.8mol NaClO2/l;; | 80% |
| Conditions | Yield |
|---|---|
| In water Kinetics; react. of ClO2 and I(1-), react. temp. 25°C, pH 2 and 5; monitored by stopped-flow techniques or spectrophotometrically; |
| Conditions | Yield |
|---|---|
| In water Electrolysis; |
| Conditions | Yield |
|---|---|
| In water 15-35°C;; |
chlorine dioxide
sodium chlorite
| Conditions | Yield |
|---|---|
| With Na-amalgame In water Electrolysis; reduction of ClO2 by hydrogen (introduction of ClO2 through a graphite-electrode into H2O, generation of HClO2), react. of generated HClO2 with Na-amalgame-electrode;; | |
| With sodium hydroxide; dihydrogen peroxide In water byproducts: H2O, O2; | |
| With sodium amalgam In water Na-amalgam: cathode of NaCl-electrolysis, mechanism discussed;; |
| Conditions | Yield |
|---|---|
| In water Electrolysis; reduction of ClO2 by hydrogen (introduction of ClO2 through a graphite-electrode into aq. NaCl, generation of HClO2), react. of generated HClO2 with NaCl;; | |
| In water Electrolysis; apparatus described;; |
| Conditions | Yield |
|---|---|
| With pyrographite In water byproducts: CaCO3; preparation of a Ca(ClO2)2-soln. by react. of a ClO2/air-mixture (5% ClO2) with Ca(OH)2 and C in H2O, filtration, react. with Na2C2O4;; |
chlorine dioxide
sodium hydroxide
zinc
B
sodium chlorite
C
sodium chloride
| Conditions | Yield |
|---|---|
| In not given with excess of Zn powder (20-30%), with equiv. amt. of NaOH, filtrating of Zn(OH)2, evapn.; ca. 85 mol-% NaClO2; | |
| In not given with excess of Zn powder (20-30%), with equiv. amt. of NaOH, filtrating of Zn(OH)2, evapn.; ca. 85 mol-% NaClO2; |
chlorine dioxide
sodium hydroxide
B
sodium chlorite
C
water
| Conditions | Yield |
|---|---|
| In water part of cyclic process;; |
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Sodium Chlorite(CAS NO.7758-19-2) is also named as Alcide LD; CCRIS 1426; Caswell No. 755; Chlorite sodium; Chlorous acid, sodium salt; EPA Pesticide Chemical Code 020502; HSDB 733; Neo Silox D; Textile; Textone; UNII-G538EBV4VF. Sodium Chlorite is white flakes. It is soluble in water. It is corrosive to skin and/or metals. Sodium Chlorite is an oxidizing agent. Sodium chlorite reacts very violently with organic materials containing divalent sulfur or with free sulfur (may ignite). Inhalation, ingestion or skin contact with Sodium Chlorite may cause severe injury or death.
Preparation of Sodium Chlorite: Sodium chlorite is derived indirectly from sodium chlorate, NaClO3. First, the explosively unstable gas chlorine dioxide, ClO2 is produced by reducing sodium chlorate in a strong acid solution with a suitable reducing agent (for example, sodium chloride, sulfur dioxide, or hydrochloric acid). The chlorine dioxide is then absorbed into an alkaline solution and reduced with hydrogen peroxide, H2O2 yielding sodium chlorite.
Sodium chlorite is also manufactured from chlorine dioxide, sodium hydroxide, and calcium hydroxide.
4NaOH + Ca(OH)2 + C + 4ClO2 → 4NaClO2 + CaCO3 + 3H2O
After filtering oil, the calcium carbonate, the solution of sodium chlorite(NaClO2) is evaporated and drum－dried.
Uses of Sodium Chlorite: The main application of Sodium Chlorite is the generation of chlorine dioxide for bleaching and stripping of textiles, pulp, and paper. It is also used for disinfection of a few municipal water treatment plants after conversion to chlorine dioxide. In organic synthesis, sodium chlorite is frequently used as a reagent in the Pinnick oxidation for the oxidation of aldehydes to carboxylic acids.
When you are using this chemical, please be cautious about it as the following:
1. Keep away from combustible material;
2. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;
3. Wear suitable protective clothing, gloves and eye/face protection;
4. In case of accident or if you feel unwell, seek medical advice immediately (show label where possible);
5. In case of insufficient ventilation, wear suitable respiratory equipment;
You can still convert the following datas into molecular structure:
(1)InChI=1S/ClHO2.Na/c2-1-3;/h(H,2,3);/q;+1/p-1;
(2)InChIKey=UKLNMMHNWFDKNT-UHFFFAOYSA-M;
(3)SmilesCl(=O)[O-].[Na+]
The toxicity data is as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| guinea pig | LD50 | oral | 300mg/kg (300mg/kg) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 45(4), Pg. 6, 1980. | |
| man | TDLo | oral | 143mg/kg (143mg/kg) | KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)" LUNGS, THORAX, OR RESPIRATION: CYANOSIS GASTROINTESTINAL: NAUSEA OR VOMITING | Renal Failure. Vol. 15, Pg. 645, 1993. |
| mouse | LD50 | oral | 350mg/kg (350mg/kg) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 45(4), Pg. 6, 1980. | |
| rat | LC50 | inhalation | 230mg/m3/4H (230mg/m3) | National Technical Information Service. Vol. OTS0534543, | |
| rat | LD50 | oral | 165mg/kg (165mg/kg) | Yakkyoku. Pharmacy. Vol. 31, Pg. 959, 1980. | |
| rat | LD50 | oral | 165mg/kg (165mg/kg) | LIVER: "JAUNDICE, OTHER OR UNCLASSIFIED" KIDNEY, URETER, AND BLADDER: INTERSTITIAL NEPHRITIS | Yakkyoku. Pharmacy. Vol. 31, Pg. 959, 1980. |
