Sodium Sulphite Supplier in Malaysia
- Also known as
- Sodium Sulfite
- Na2SO3
- E221
- Natrium Sulfit
Sodium sulphite supplier enquiries in Malaysia commonly cover boiler-water oxygen scavenging, dechlorination, pulp and paper, textile reducing work, food preservation systems and photographic processing. Also known as sodium sulfite, Na2SO3 and E221, this inorganic salt is selected as a reducing agent and oxygen scavenger. It is not sodium sulphate (Na2SO4).
Commercial buyers choose between anhydrous powder and crystals, and between technical, food and photographic grades. Anhydrous powder suits specifications written to water-free Na2SO3, while crystals are preferred for solid handling or dissolving on site. Assay, form and grade documentation should be stated with the enquiry.
Water treatment and boiler operators use technical grades for oxygen scavenging and dechlorination. Pulp, paper and textile processors specify sulphite for reducing and bleaching-support duties. Food and beverage buyers request food grade or E221 material where a preservation system allows it, and manufacturing or laboratory users select photographic or reagent grades for imaging chemistry and process trials.
Send the required form, grade, specification, quantity and delivery location with your enquiry. Availability, packing, documentation and delivery timing are confirmed with the quotation, together with a stated price validity period.
- CAS number
- 7757-83-7
- Formula
- Na2SO3
- Grade
- technical, food, photographic
- Appearance
- white crystalline powder or crystals according to form
Sodium Sulphite grades and forms
We supply several forms to suit different formulating and dosing setups. If you need a size that is not listed, ask us.
| Grade | Form | Assay | Typical use | Packing |
|---|---|---|---|---|
| Anhydrous sodium sulphite powder | white free-flowing powder or crystalline powder | — | Industrial reducing-agent work, oxygen scavenging and process formulations written to anhydrous Na2SO3 without water of crystallisation. | Confirm the required pack format with the quotation. |
| Sodium sulphite crystals | white crystals or crystalline granules | — | General industrial and process use where a crystalline solid is preferred for handling, dissolving or on-site solution preparation. | Confirm the required pack format with the quotation. |
| Technical grade sodium sulphite | powder or crystals according to the quoted grade | — | Boiler-water oxygen scavenging, dechlorination, pulp and paper bleaching support, textile reducing steps and general industrial reducing-agent duty. | Confirm the required pack format with the quotation. |
| Food grade sodium sulphite | powder or crystals according to the quoted grade | — | Food and beverage preservation or antioxidant systems where E221 or a food grade is specified. Suitability depends on the recipe and required limits. | Confirm the required pack format with the quotation. |
| Photographic grade sodium sulphite | powder or crystals according to the quoted grade | — | Photographic developing and processing chemistry where a photographic grade or tighter impurity profile is required. | Confirm the required pack format with the quotation. |
How to buy sodium sulphite from ChemTrade
Request a quote for sodium sulphite
Use the form below to request a quotation. You can also email sales@chemtrademalaysia.com or send us a message on WhatsApp.
Specifications
| Parameter | Value | Method |
|---|---|---|
| Appearance | white crystalline powder or crystals according to form | — |
| Chemical identity | sodium sulphite, Na2SO3 (also written sodium sulfite); not sodium sulphate | — |
| Common commercial form | anhydrous powder or crystals; assay and hydration state confirmed against the required grade | — |
| Solubility | soluble in water | — |
| Assay and impurity profile | assay, moisture or hydration state, and impurity limits confirmed against the buyer's specification | — |
Sodium Sulphite applications
Safety and handling
Keep sealed in a cool, dry place and protect from moisture, acids and strong oxidisers. Control dust during powder handling and follow the safety information supplied with the quoted grade.
Common questions about sodium sulphite
Are sodium sulphite and sodium sulfite the same product?
Yes. Sodium sulphite is the British spelling and sodium sulfite is the American spelling of the same salt, Na2SO3. Buyers should still state anhydrous powder or crystals, grade and the target specification because commercial lots differ by form and impurity profile.
Is sodium sulphite the same as sodium sulphate, metabisulphite or thiosulphate?
No. Sodium sulphite is Na2SO3. Sodium sulphate is Na2SO4, sodium metabisulphite is a different sulphite-family salt, and sodium thiosulphate is Na2S2O3. Do not substitute one for another. Enquiries should name sodium sulphite (or Na2SO3) and the required grade clearly.
Which form should I request, anhydrous powder or crystals?
Anhydrous powder is commonly selected when a process or specification is written to water-free Na2SO3. Crystals or crystalline granules are chosen where solid handling or on-site dissolving is preferred. Confirm assay and hydration state against the written specification rather than treating forms as interchangeable.
Which grade is used for boiler oxygen scavenging or dechlorination?
Technical grade sodium sulphite is commonly requested for boiler-water oxygen scavenging and dechlorination. State the duty, dosing method, required form and any assay or documentation limits so the quoted grade can be matched to the process.
Is food grade sodium sulphite available as E221?
Food grade material is requested where sodium sulphite or E221 is specified in a food or beverage system. Suitability depends on the recipe, use level and required specification. Supply is subject to applicable requirements. Describe the application and target limits with the enquiry.
What details are needed for a sodium sulphite price enquiry?
Provide form, grade, target specification, quantity and delivery location. Mention preferred pack format, documentation needs and application so the quotation can address the complete requirement. Price, packing and commercial terms are confirmed with the quotation and a stated validity period.