Your Trusted Partner for Industrial-Grade Sodium Sulfide

We are a specialized Sodium Sulfide Supplier with a proven track record of delivering high-purity Na₂S flakes to industries across six continents. Our clients in leather manufacturing, mineral processing, chemical synthesis, and pulp production depend on us for one reason — we deliver consistent quality, on time, every time.

Sodium Sulfide (Na₂S) is one of the most widely consumed inorganic alkali sulfides in modern industry. Its powerful reducing capability and strong alkalinity make it indispensable wherever controlled chemical reactivity is required — from stripping hair off raw hides to recovering precious metals from oxidized ores.

We supply Na₂S as 60% active-content yellow flakes in the hydrated form (Na₂S·9H₂O). Every batch leaves our facility with a Certificate of Analysis, full SDS documentation, and export-ready packaging built for international hazardous goods transport.

Product Specifications

The table below outlines the physicochemical profile of our standard industrial-grade product. We recommend that every buyer confirm these parameters against their process requirements before placing an order.

Chemical Formula — Na₂S (Anhydrous) / Na₂S·9H₂O (Hydrated)

CAS Number — 1313-82-2

Molecular Weight — 78.04 g/mol (Anhydrous)

Appearance — Yellow to light-red flakes (color determined by iron content)

Odor — Characteristic sulfide odor (trace H₂S on moisture contact)

Solubility in Water — Highly soluble, forms strongly alkaline solution

Melting Point — ~1,175°C (Anhydrous) | ~92°C (60% Hydrated Flake)

Density — 1.58–1.62 g/cm³

pH in Solution — 11–13 (strongly alkaline)

---

Industrial Applications Of Sodium Sulfide

Sodium Sulfide is not a single-purpose chemical. It drives critical reactions across multiple heavy industries. As a full-service Sodium Sulfide Supplier, we understand how Na₂S integrates into each of these production environments — and we supply the complementary chemicals to support your complete process.

Leather Processing — Dehairing and Liming

The global leather industry consumes more Sodium Sulfide than any other sector. Na₂S is the standard dehairing agent in beam house operations worldwide.

How it works. Sodium Sulfide cleaves the disulfide bonds in hair keratin, dissolving hair at the follicle level and allowing clean separation from the hide without damaging the grain layer. It works within the alkaline liming bath, typically alongside calcium hydroxide.

Why purity matters. Iron contamination above 15 ppm causes dark staining on finished leather. This is why tanneries specifically seek a Sodium Sulfide Supplier that guarantees low-iron yellow flakes with consistent active content. Our product delivers ≤10 ppm iron — batch after batch.

Mining and Mineral Flotation

In extractive metallurgy, Sodium Sulfide serves as a sulfidizing agent that transforms the surface chemistry of oxidized minerals, making them recoverable through froth flotation.

How it works. When added to a flotation circuit, Na₂S converts oxide surfaces on lead, copper, zinc, and gold-bearing minerals into sulfide surfaces. These modified surfaces then respond to xanthate collectors, allowing selective separation of valuable metals from gangue material.

Process integration. Flotation performance depends on precise pH control. Na₂S is frequently used alongside Soda Ash as a pH modifier to maintain optimal alkalinity in the pulp. As your chemical partner, we supply both products to simplify your procurement.

Pulp and Paper — Kraft Process

The Kraft process — the dominant method for producing chemical wood pulp — cannot function without Sodium Sulfide.

How it works. Na₂S is combined with Caustic Soda (NaOH) to create “white liquor.” This cooking liquor penetrates wood chips under heat and pressure, selectively dissolving lignin while preserving cellulose fibers. The sulfide component accelerates delignification and produces stronger pulp compared to soda-only processes.

Result. High-strength unbleached pulp suitable for corrugated packaging, kraft paper, and linerboard manufacturing.

Chemical Synthesis and Heavy Metal Precipitation

In chemical manufacturing, Na₂S functions as a versatile reducing agent for synthesizing dyes, rubber chemicals, and pharmaceutical intermediates.

In wastewater treatment, it is the preferred reagent for precipitating dissolved heavy metals, including Lead (Pb²⁺), Copper (Cu²⁺), Nickel (Ni²⁺), Chromium (Cr³⁺), and Zinc (Zn²⁺). These metals form highly insoluble metal sulfide precipitates that are easily removed by conventional filtration or settling.

For downstream effluent polishing — including COD reduction and residual sulfide neutralization — Hydrogen Peroxide is commonly applied as the oxidizing stage.

Textile Industry — Sulfur Dye Application

Sodium Sulfide is the essential reducing agent for dissolving and applying sulfur dyes to cotton and blended fabrics. It converts insoluble sulfur dye pigments into their soluble, substantive form, enabling deep penetration into fiber structures.

After dyeing, the fabric requires thorough washing, scouring, and finishing. We supply the complete chemical package for these downstream processes, including high-performance surfactants like LABSA and SLES.

Rubber Vulcanization

In rubber manufacturing, Na₂S participates in vulcanization chemistry — the crosslinking process that gives rubber its elasticity, resilience, and thermal stability. Facilities producing rubber compounds often also require processing aids such as PE Wax for mold release and compounding lubrication. We supply both.

---

Safe Handling, Storage, and Regulatory Compliance

Any credible Sodium Sulfide Supplier will tell you plainly — this chemical demands respect. Na₂S is corrosive, moisture-reactive, and generates toxic gas under specific conditions. We provide full safety documentation and handling guidance with every order.

Hazard Classification. Corrosive (GHS05), Acute Toxicity (GHS06), Environmental Hazard (GHS09).

Primary Risk. Contact with acids releases hydrogen sulfide (H₂S) — a toxic, flammable gas detectable by its sulfide odor at low concentrations but dangerously undetectable at high concentrations due to olfactory fatigue.

PPE Required. Chemical-resistant gloves, splash-proof safety goggles, full-body protective clothing, and respiratory protection in enclosed or poorly ventilated spaces.

Storage Requirements. Store in a cool, dry, well-ventilated warehouse. Keep containers tightly sealed at all times. Isolate from acids, oxidizing agents, and moisture sources. Store away from direct sunlight and heat sources.

Shelf Life. Properly sealed Na₂S flakes maintain specification for 12 to 24 months. Prolonged exposure to air and humidity causes progressive oxidation to sodium sulfite (Na₂SO₃) and sodium thiosulfate (Na₂S₂O₃), which reduces active Na₂S content and process effectiveness.

A complete Safety Data Sheet (SDS) accompanies every shipment.

---

Packaging and Global Shipping

We package and ship Sodium Sulfide to international standards for hazardous chemical transport. Our logistics team manages the entire chain — from warehouse loading to destination port clearance documentation.

Available Packaging Options

25 kg multi-layer PP/PE bags (palletized), 150 kg sealed iron drums, and 1,000 kg jumbo bags (FIBC).

Logistics Capabilities

Full Container Load (FCL) and Less-than-Container Load (LCL) options are available. All shipments comply with IMDG Code for sea freight and IATA DGR for air freight. Every order includes a complete documentation package covering Commercial Invoice, Packing List, Certificate of Analysis, SDS, Bill of Lading, and Customs Declaration. We ship to all major ports worldwide.

---

Why Choose Us as Your Sodium Sulfide Supplier?

We are not a trading desk reselling someone else’s product. We are a Sodium Sulfide Supplier with direct access to production, in-house quality control, and a logistics infrastructure built specifically for hazardous chemical exports. Here is what that means for your business.

Verified Quality on Every Batch. Every shipment carries a Certificate of Analysis confirming Na₂S content, iron level, moisture, and insoluble matter. You receive exactly what the specification sheet promises.

Single-Source Chemical Procurement. Beyond Na₂S, we supply the chemicals your facility actually needs — Caustic Soda, Soda Ash, Hydrogen Peroxide, LABSA, SLES, and PE Wax. One supplier, one relationship, fewer procurement headaches.

Technical Expertise. Our team advises on dosage optimization, storage best practices, and application-specific product selection. We do not just ship drums — we help you get results.

Reliable Global Delivery. We maintain a consistent supply regardless of seasonal demand fluctuations. Our clients receive confirmed delivery schedules and proactive shipment tracking from loading to arrival.

---

---

Technical Data Sheets of Sodium Sulfide

Note: Exact specifications vary by product grade. Please request the official TDS for your application.