---
title: Ammonium Sulfide 20%,40%
date: 2025-02-21T09:18:42Z
modified: 2026-09-14T06:33:14Z
permalink: "https://allanchem.com/ammonium-sulfide-2040/"
type: page
status: publish
excerpt: ""
wpid: 2794
timestamp: 2026-09-14T06:33:14Z
tags: []
---

##### CAS Number

12135-76-1















##### grade

Reagent















##### packaging

Various







































Ammonium sulfite is an inorganic compound composed of ammonium ions (NH₄⁺) and sulfite ions (SO₃²⁻). Ammonium sulfite solutions are typically prepared as solutions containing a specific concentration of ammonium sulfite, such as Ammonium sulfite 20%, which denotes a solution containing 20% (by weight) of ammonium sulfite dissolved in water. 40%, which denotes a solution containing 40% (by weight).
**Chemical Formula:** (NH₄)₂S₃
**Appearance**: Colorless to yellowish liquid.
**Uses:**
**Chemical Synthesis:** This chemical can serve as a reducing agent in chemical synthesis processes. Helps reduce certain organic and inorganic compounds, as well as to scavenge oxygen from reaction mixtures.
**Food Industry:** This chemical acts as a food preservative, although this usage is less common due to concerns about sulfite sensitivity in certain individuals. It can inhibit microbial growth and prevent oxidation in certain food products.
**Textile Processing:** In the textile industry, Ammonium sulfite 20% may be utilized as a reducing agent or a dyeing auxiliary in textile processing. It can assist in the removal of excess dyes, impurities, or oxidative byproducts during dyeing or finishing processes.
**Water Treatment:** Ammonium sulfite 20% can be employed for dechlorination purposes in water treatment systems. It reacts with chlorine and chloramine compounds present in water, converting them into less harmful or non-toxic forms.







































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