Industrial gradeCAS 7758-19-2

Sodium Chlorite

The oxidant behind chlorine dioxide, from the company that wrote the standard

Sodium chlorite is an efficient, mild strong oxidising agent used for bleaching, sterilisation, deodorisation and oxidation. Gaoyuan is the largest producer and exporter of sodium chlorite in China, and organised and compiled the HG/T 3250-2023 industry standard the product is made to.

CAS No.
7758-19-2
EINECS No.
231-836-6
Formula
NaClO₂
Molecular weight
90.44
Standard
HG/T 3250-2023
Transport
UN 1908

Solid: white or slightly yellowish crystalline powder. Liquid: pale yellow alkaline aqueous solution.

  • Drinking water grade
  • Concentration to customer specification

Concentration, grade and packaging are set to your specification. Tell us the end use and the market, and we will confirm which grade applies and what documentation comes with it.

Applications

Where this chemistry actually gets used.

Every field below has different purity and documentation requirements. Tell us which one you are in and we will confirm the grade before quoting.

Drinking water and municipal treatment

Activated by acid, sodium chlorite generates high-purity chlorine dioxide. High disinfection efficiency with minimal disinfection by-products makes it standard practice in municipal waterworks. Our product is listed on the official US inventory of drinking water treatment chemicals.

Textile printing, dyeing and papermaking

Minimal fibre damage with mild, long-lasting bleaching. In pulp bleaching it replaces chlorine-containing bleaches, which is how paper mills move to an environmentally upgraded process.

Medical disinfection and biomedicine

Chlorine dioxide gas diffuses and penetrates well, reaching crevices and dead spaces inside equipment, and is low in corrosiveness to medical devices. Chlorite-loaded nanofibres release ClO₂ below pH 7 and have self-disinfection potential.

Food processing and aquaculture

Used for sterilisation and fresh-keeping. Applications in this field must comply strictly with food-grade standards — tell us the end use and we will confirm the grade.

Flue gas denitrification

Acts as a strong oxidant, converting insoluble nitric oxide into soluble higher-valence nitrogen oxides such as NO₂, which the desulfurisation system then removes efficiently.

Other fields

Environmental deodorisation and air purification; removal of impurities and grease in leather processing; oxidant in pharmaceutical, pesticide and fine-chemical synthesis; precision surface treatment of metals.

Specification

Identification and properties.

Assay and impurity limits follow HG/T 3250-2023 and the grade ordered. We send the full specification sheet and a batch certificate of analysis on request.

Identification

Chemical name
Sodium chlorite
CAS No.
7758-19-2
EINECS No.
231-836-6
Molecular formula
NaClO₂
Molecular weight
90.44
UN No.
UN 1908

Physical properties

Appearance, solid
White to slightly yellowish crystalline powder
Appearance, liquid
Pale yellow alkaline aqueous solution
Solubility
Readily soluble in water; soluble in alcohols
Thermal stability
Stable at ambient temperature when cool and dry. Decomposes above 170 °C into sodium chlorate and sodium hypochlorite; rapid decomposition near 200 °C.

Assay and impurities

Full specification
Assay, chlorate, chloride, moisture and water-insoluble limits are set per HG/T 3250-2023 and per the grade ordered. Request the specification sheet and a batch COA below.

Packaging

How it ships.

Standard export packing is listed here. Drum size, concentration and drum marking are all changed to your specification.

  • Solid: iron drums with a plastic inner liner, 50 kg net per drum
  • Liquid, IBC tote: 1,250 kg net per tote
  • Liquid, 200 L polyethylene drum: 250 kg net per drum
  • Liquid, 20 L polyethylene drum: 25 kg net per drum
  • Customised packaging and concentration available on request

Customisation

  • 01Concentration to your specification
  • 02Packaging format and drum size
  • 03Grade selection for the end use — tell us the application and we will confirm

Storage & handling

Read this before the first container lands.

A safety data sheet is issued with the order. The points below are the ones that most often get missed on a first purchase, so they are on the page rather than in an annex.

Storage & transport

  • 01Do not transport together with acids or reducing substances
  • 02Store in a cool, dry warehouse away from fire and heat sources
  • 03Keep separated from acids, organic materials and reducing agents
  • 04In case of fire use water spray or sand — dry powder extinguishers are prohibited

Health hazards

  • 01Dust irritates the respiratory tract, mucous membranes, eyes and skin
  • 02On contact with skin or eyes, rinse immediately with plenty of water
  • 03If swallowed, drink salt water or warm soapy water to induce vomiting and seek medical treatment promptly
  • 04The oral lethal dose is 10 grams

Documents

What we send with a quotation.

Which documents apply depends on your market and end use, so we confirm the destination before sending. Sodium chlorite for drinking water, for textile bleaching and for flue gas treatment are three different conversations.

  • Product specification sheet for the grade quoted
  • Batch certificate of analysis (COA)
  • Safety data sheet (SDS)
  • ISO 9001, ISO 14001 and ISO 45001 certificates
  • NSF listing and EU REACH registration, where they apply to your market

Also produced here

The rest of the range.

View all products

Chloroethylene Carbonate

Electrolyte additive for lithium-ion batteries, from a dedicated 40,000 t/y line

Electrolyte additive · Oxidation

CAS 3967-54-2C₃H₃ClO₃

Request a quote

Tell us the grade, the volume and the market.

Those three answers decide the price, the grade and which certificates apply. With them in the first message we can quote in one reply instead of three.

Product
Sodium Chlorite
CAS
7758-19-2
Formula
NaClO₂
Standard
HG/T 3250-2023

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