---
title: "Sodium Metabisulfite (SMBS) (Na2S2O5)"
description: "Sodium metabisulfite (SMBS, Na₂S₂O₅) is a highly water-soluble white crystalline powder with preservative, antioxidant and disinfectant properties. Kemindo…"
url: https://site.kemindogroup.com/en/products/sodium-metabisulfite
lang: en
lastmod: 2026-10-27T00:00:00.000Z
site: Kemindo Group
---

# Sodium Metabisulfite (SMBS) (Na2S2O5)

Sodium metabisulfite (SMBS, Na₂S₂O₅) is a highly water-soluble white crystalline powder with preservative, antioxidant and disinfectant properties. Kemindo supplies it as one of its major reagents for the mining industry and for water treatment and other industries.

## Key facts

- Formula: Na2S2O5
- Business lines: [Chemicals & Consumables](https://site.kemindogroup.com/en/business/chemicals)
- Categories: [Chemicals](https://site.kemindogroup.com/en/products/category/chemical)
- Industries: mining
- Availability: Available

Sodium Metabisulfite (Na₂S₂O₅) is an inorganic compound widely used in various industries due to its preservative, antioxidant and disinfectant properties. It is a white crystalline powder with a slight sulphur odour and is highly soluble in water. Sodium metabisulfite is commonly encountered in food preservation, water treatment, photography and other industrial applications.

## Specifications

| Parameter | Value | Unit |
|---|---|---|
| Sodium Metabisulphite (Na₂S₂O₅) | min 96.5 | % |
| Fe | max 0.005 | % |
| Water insoluble | max 0.05 | % |
| As | max 0.0001 | % |
| Heavy metal (Pb) | max 0.0005 | % |
| pH value | max 4.0-5.0 |  |
| SO2 | min 65 | % |
| Appearance | White to slightly yellowish crystalline powder |  |

## Applications

- Food preservation
- Water treatment
- Photography

## Related products

- [Hydrated Lime](https://site.kemindogroup.com/en/products/hydrated-lime)
- [Quick Lime](https://site.kemindogroup.com/en/products/quick-lime-cao)
- [Copper Sulphate Pentahydrate](https://site.kemindogroup.com/en/products/copper-sulphate)

Request a quote: https://site.kemindogroup.com/en/contact?produk=sodium-metabisulfite