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Sodium Chlorite
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Name

Sodium Chlorite

 EINECS 231-836-6
CAS No. 7758-19-2 Density 1.28 g/cm3 (20oC)
PSA 40.13000 LogP 0.45190
Solubility 39 g/100 mL (17 °C) in water Melting Point 190 °C (dec.)
Formula NaClO2 Boiling Point 112oC
Molecular Weight 90.4416 Flash Point N/A
Transport Information UN 2813 4.3/PG 3 Appearance white flakes
Safety 17-26-36/37/39-45-50A-38-36 Risk Codes 8-22-24-32-34-9-26-25-14-36/37/38-21
Molecular Structure Molecular Structure of 7758-19-2 (Sodium chlorite) Hazard Symbols OxidizingO, HarmfulXn, ToxicT, VeryT+
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;

Article Data 115

Sodium Chlorite Synthetic route

10049-04-4, 25052-55-5

chlorine dioxide

1310-73-2

sodium hydroxide

7758-19-2

sodium chlorite

Conditions
ConditionsYield
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%
Hg(b),Na(0-0.1) (X%)

Hg(b),Na(0-0.1) (X%)

10049-04-4, 25052-55-5

chlorine dioxide

7758-19-2

sodium chlorite

Conditions
ConditionsYield
In water 20°C, pH=8.2-9.2, several cycles; mechanism discussed;; 0.6-0.8mol NaClO2/l;;80%
10049-04-4, 25052-55-5

chlorine dioxide

14362-44-8

iodide

A

7758-19-2

sodium chlorite

B

7553-56-2

iodine

Conditions
ConditionsYield
In water Kinetics; react. of ClO2 and I(1-), react. temp. 25°C, pH 2 and 5; monitored by stopped-flow techniques or spectrophotometrically;
7647-14-5

sodium chloride

A

sodium chlorate

B

7681-52-9

sodium hypochlorite

C

7758-19-2

sodium chlorite

D

sodium perchlorate

Conditions
ConditionsYield
In water Electrolysis;

sodium perborate

7681-11-0

potassium iodide

7758-19-2

sodium chlorite

Conditions
ConditionsYield
In water 15-35°C;;
10049-04-4, 25052-55-5

chlorine dioxide

7758-19-2

sodium chlorite

Conditions
ConditionsYield
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;;
10049-04-4, 25052-55-5

chlorine dioxide

7647-14-5

sodium chloride

7758-19-2

sodium chlorite

Conditions
ConditionsYield
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;;
10049-04-4, 25052-55-5

chlorine dioxide

62-76-0

sodium oxalate

calcium hydroxide

7758-19-2

sodium chlorite

Conditions
ConditionsYield
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;;
10049-04-4, 25052-55-5

chlorine dioxide

1310-73-2

sodium hydroxide

7440-66-6

zinc

A

sodium chlorate

B

7758-19-2

sodium chlorite

C

7647-14-5

sodium chloride

D

zinc(II) hydroxide

Conditions
ConditionsYield
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;
...Expand
10049-04-4, 25052-55-5

chlorine dioxide

1310-73-2

sodium hydroxide

A

sodium chlorate

B

7758-19-2

sodium chlorite

C

7732-18-5

water

Conditions
ConditionsYield
In water part of cyclic process;;

Sodium Chlorite Specification

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.

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