Description

Ammonium Sulfide is an inorganic salt solution known for its characteristic odor of hydrogen sulfide. This versatile chemical reagent is crucial for its role as a precipitating agent in qualitative inorganic analysis and as a sulfur source in various synthesis processes. It is primarily utilized by analytical laboratories, metallurgical facilities, and manufacturers in the electronics and textile industries for applications ranging from metal treatment to synthetic intermediates.

Application

• Analytical Chemistry: Used as a key precipitating agent in qualitative inorganic analysis for separating and identifying metal ions, particularly in Group II of the traditional analytical scheme.
• Metallurgy & Metal Treatment: Employed in surface treatment processes, such as the blackening of brass and bronze, and in certain metal coloring and patination techniques.
• Electronics Manufacturing: Serves as a precursor or sulfur source in the synthesis of semiconductor materials and in specific etching processes for electronic components.
• Textile Industry: Utilized in specific dyeing and printing processes where sulfur-based compounds are required for color fixation or fabric treatment.
• Chemical Synthesis: Acts as a sulfur donor in organic and inorganic synthesis for producing various sulfide compounds and intermediates.
• Photography (Historical Processes): Applied in certain toning and development processes in traditional photographic printing.
• Laboratory Research: A common reagent in research laboratories for studying sulfide chemistry, corrosion processes, and material science.

Basic Information

Product Name	Ammonium Sulfide
CAS No.	12135-76-1
Molecular Formula	H8N2S
Molecular Weight	68.15 g/mol
Synonyms	Ammonium monosulfide; Diammonium sulfide; Ammonium sulfide ((NH4)2S); Sulfurous acid, diammonium salt; Ammonium hydrogen sulfide (mixture); Ammonium hydrosulfide; Ammonium sulfuret; Ammonium sulfide solution
EINECS	235-223-4

Quality Control

Our Ammonium Sulfide is manufactured under strict quality control protocols to ensure batch-to-batch consistency and reliability. We adhere to relevant industry standards, and each lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing key parameters such as assay, specific gravity, and impurity profiles. Our quality system is designed to meet the stringent requirements of industrial and laboratory applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials such as strong acids and oxidizers. Due to its highly volatile and light-sensitive nature, containers should be kept tightly sealed when not in use to prevent decomposition and release of hydrogen sulfide gas. Recommended storage temperature is between 15°C and 25°C.

Specification

Item	Specification
Appearance	Yellowish solution
Identification (IR)	Conforms
Assay (as (NH4)2S)	40-44% w/w
Specific Gravity (20°C)	1.00 - 1.03
Residue after Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.