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sodium sulfide

  • sodium sulfide

sodium sulfide

Shandong Junteng Chem Sodium Sulfide: Industrial Sodium Sulfide for leather unhairing, mining flotation & heavy metal wastewater treatment, bulk supply.
Tel: +86 18596277178
Tel: +86 15588955913
Tel: +86 17663494691
WhatsApp: +86 18866832776
Email: victoria@juntengchem.com

Product Parameters


Yellow FlakesRed Flakes
Test ltemsResultResult
Na2S60.01%63.17%
IRON(Fe)0.008%0.0065%
Water insoluble0.18%0.09%
Na2SO30.85%0.35%
Na2S2O35.52%5.52%
Na2CO35.0%2.53%


Basic Properties

Physical Properties

- Appearance & Odor: Anhydrous sodium sulfide is colorless crystalline solid; commercial industrial grade appears light yellow, tan to brick-red flakes or powder. Exhibits typical rotten-egg odor due to hydrogen sulfide release in moist air; highly deliquescent, non-flammable

- Melting Point: 950 °C (lit., anhydrous); hydrated forms melt at lower temperatures with crystal water loss under heating

- Boiling Point: Decomposes at high temperature without fixed boiling point; volatile sulfide gas released under high heat and humid conditions

- Density: 1.86 g/cm³ at 25 °C (anhydrous, lit.); bulk density varies with flake/powder particle size

- Solubility: Highly soluble in water (15.4 g/100 mL at 10 °C, 57.2 g/100 mL at 90 °C); easily soluble in hot water, slightly soluble in ethanol, insoluble in ether and most organic solvents

- pH Value: 11.5–12.5 (5% aqueous solution at 25 °C); strongly alkaline aqueous solution

- Hygroscopicity: Extremely deliquescent; rapidly absorbs moisture and CO₂ from air to deteriorate

- Physical State: Stable solid at room temperature (anhydrous); hydrated forms prone to agglomeration in humid environments

Chemical Properties

- Chemical Structure: Typical ionic inorganic salt composed of sodium ions (Na⁺) and sulfide ions (S²⁻); hydrated forms bind crystal water in ionic crystal structure

- Stability: Relatively stable in dry, airtight environments; unstable under humid or open-air conditions. Reacts with atmospheric moisture and carbon dioxide to produce hydrogen sulfide gas and sodium carbonate; incompatible with strong acids, strong oxidants and heavy metal salts

- Reactivity: Reacts violently with strong acids to release toxic H₂S gas; undergoes precipitation reaction with heavy metal ions (copper, iron, zinc) to form insoluble metal sulfides; easily oxidized by air and oxidants to produce sulfur or sodium thiosulfate

- Hydrolysis Property: Intensely hydrolyzes in water to generate sodium hydroxide and HS⁻/H₂S, resulting in strongly alkaline solution

- Corrosivity: Aqueous solution is corrosive to human skin, mucous membranes, wood, copper and partial alloy materials


Main Applications

1. Leather & Tanning Industry – Core Dehairing Agent

Sodium sulfide is a foundational chemical for the leather industry, mainly used as an efficient dehairing and depilatory agent for raw hide processing. It rapidly decomposes and removes hair and epidermal proteins, simplifying tanning procedures. With stable reactivity and low impurity content, it ensures smooth leather surface, uniform texture and stable finished product quality, widely applied in cowhide, sheepskin and pigskin processing.

2. Mineral Flotation & Metallurgical Processing

It serves as a critical flotation regulator and depressant in non-ferrous metal mining, effectively separating sulfide ores such as copper, lead and zinc. It inhibits gangue mineral floating, improves ore concentrate grade and recovery rate. In metallurgy, it is used for metal precipitation and impurity removal, supporting efficient purification of heavy metal minerals with reliable reaction stability.

3. Textile & Dyeing Auxiliaries

As an essential auxiliary for sulfur dye printing and dyeing, sodium sulfide acts as a reducing dissolving agent for sulfur dyes. It fully dissolves dyes, improves dye uptake and color fastness, and avoids color fading and uneven coloring. It is widely used in cotton fabric dyeing and textile finishing, ensuring stable coloring effect and reducing processing defects.

4. Chemical Synthesis & Sulfide Derivatives

It is a key raw material for synthesizing various sulfide chemicals, including sodium hydrosulfide, thiophenol, sulfur dyes and rubber auxiliaries. It features high chemical activity and stable purity, enabling high-yield and low-impurity synthesis of downstream products, supporting large-scale production of fine chemicals and industrial additives.


Safety Precautions

1. Safety & Handling Instructions

  • Operate in well-ventilated areas; avoid dust exposure and moisture contact (releases toxic hydrogen sulfide gas).

  • Prevent skin, eye, and inhalation exposure; strictly prohibit ingestion due to corrosive and toxic properties.

  • Wash skin thoroughly after handling; no eating, drinking, or smoking in working areas.

  • Handle containers tightly sealed; avoid heat accumulation, friction and incompatible substance contact.

2. Personal Protective Equipment (PPE)

  • Eye/Face: Chemical goggles plus full face shield to block corrosive dust and splashes.

  • Hands: Heavy-duty chemical-resistant gloves (butyl or neoprene rubber).

  • Body: Impermeable protective clothing and boots to prevent skin contact and contamination.

  • Respiratory: NIOSH-approved respirator for poor ventilation, dust exposure or large-scale operation.

3. Storage Conditions

  • Store in cool, dry, ventilated areas; keep containers fully sealed to avoid moisture-induced toxic gas release.

  • Keep away from heat sources, direct sunlight and combustibles to prevent self-heating and spontaneous combustion.

  • Store separately from strong acids, oxidizers and metals; isolate from food and aquatic environments.


Company Profile

Junteng Chemical is a professional chemical raw materials trading company dedicated to providing customers with one-stop procurement services. Through strict supplier, supply chain, and after-sales management, the company ensures that product quality, transportation, and use meet customer needs. Furthermore, the company's technical team offers customized solutions and support services free of charge.

 

The company has projects in the pharmaceutical, pesticide, petrochemical, construction, food additives, wastewater treatment, adhesives, inks, paints, coatings, plastic and rubber processing, detergent raw materials, fertilizer and textile mills, and more. Junteng Chemical sources products of stable and reliable quality, collaborating with domestic and international companies such as Luxi Group, Weiyuan Chemical, Qilu Petrochemical, Dongying Lihuayi, Yanshan Petrochemical, Sinopec, Shijiazhuang Refinery, Qingdao Petrochemical, Sailboat, Dow Chemical, BASF, South Korea, Taiwan, and Saudi Arabia. Our stable supply, superior product quality, and mature logistics have earned us a wide clientele. We look forward to collaborating with all of you for a mutually beneficial future.

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Company advantages

1

One-Stop Procurement
Platform

We integrate resources across all productcategories, including organic solvents,resins and rubbers, and inorganicchemicals,and strictly control suppliers.supply chains, and after-sales processes toensure stable quality, efficienttransportation,and worry-free use,simplifying your procurement process.

2

Professional Team TechnicalEmpowerment

Equipped with an experienced technicalteam, we provide free personalizedsolutions and professional technicalsupport to customers in varlous industrie,such as pharmaceuticals, petrochemicals,coatings and inks, and sewage treatment,.helping you solve problems and improveefficiency.

3

Global supply ChainSecurity

We work with top domestic and foreignchemical giants such as Luxi Group, QiluPetrochemical, Sinopec, BASF of Germany,and Dow of the United States to establisha stable and reliable high-quality supplynetwork and a mature logistics system toensure timely and safe delivery of
products.

4

Deep Win-Win CooperationConcept

Adhering to the concept of "integrity.immediate action, professionalism,innovation and win-win" and taking"customer success and altruism" as ourmission, we are committed to establishinglong-term strategic partnerships andcreating a better future through excellentproducts and services.

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