Na2S industrial grade is sodium sulfide supplied for industrial processing rather than for laboratory or pharmaceutical use. Buyers commonly select it for leather dehairing, pulp and paper processing, mineral flotation, chemical synthesis, and certain wastewater-treatment applications. I recommend evaluating it by chemical form, assay, impurity limits, physical format, packaging, transport classification, and supplier documentation rather than relying on the phrase “industrial grade” alone.
The anhydrous compound has the chemical formula Na2S, CAS Registry Number 1313-84-4, and a molar mass of approximately 78.04 g/mol. Commercial material may also be supplied as a hydrate or as a solution, so the product’s active-content basis must be confirmed before comparing quotations. Because sodium sulfide can generate toxic hydrogen sulfide gas under acidic conditions, I treat process safety, storage, and handling instructions as part of the purchasing specification.
This guide is intended for industrial procurement teams, process engineers, chemical distributors, production managers, and importers who need to source Na2S industrial grade. It is especially useful when a buyer must compare flakes, solid material, and solution products from different origins. I also recommend it for companies replacing a current supplier or qualifying a second source.
The guide does not replace a product-specific safety data sheet, local regulations, or process validation. Industrial applications may require different purity, concentration, particle size, or impurity limits. The correct product is therefore the one that meets the process requirement and the buyer’s regulatory and logistics conditions.
Na2S industrial grade is a commercial sodium sulfide product used as a reducing, sulfur-donating, dehairing, flotation, or chemical-intermediate material. Its appearance may vary by manufacturing route and product form, including flakes, lumps, powder, or aqueous solution. Color can range from white to yellow, gray, or brown depending on purity, polysulfide content, oxidation, and other impurities.
Industrial grade does not describe one globally uniform specification. One supplier may quote assay on an as-is basis, while another may quote active Na2S on a dry basis or as a hydrate equivalent. Before placing an order, I ask the supplier to define the assay method, moisture basis, concentration basis, and acceptance limits in the technical data sheet.
| Item | Typical identification or purchasing consideration |
|---|---|
| Chemical name | Sodium sulfide |
| Formula | Na2S |
| CAS number | 1313-84-4 |
| Anhydrous molar mass | Approximately 78.04 g/mol |
| Common physical forms | Flakes, lumps, powder, or aqueous solution |
| Key handling concern | Acid contact can generate hydrogen sulfide gas |
For chemical identity and hazard information, I use authoritative references such as the U.S. National Library of Medicine’s PubChem record for sodium sulfide and the relevant supplier SDS. PubChem identifies sodium sulfide under CAS 1313-84-4 and provides compound and hazard-reference information; the SDS remains the controlling document for a specific commercial grade. Source: PubChem, Sodium sulfide.
Sodium sulfide is used in beamhouse operations to help loosen hair and other keratinous material from hides. The required dosage and operating conditions depend on the hide type, process design, sulfide concentration, temperature, pH, and the use of auxiliary chemicals. I recommend that leather producers qualify the material through controlled trials instead of selecting solely on the highest advertised assay.
In pulp and paper operations, sulfide-containing chemicals can support alkaline pulping chemistry and help process lignocellulosic material. The acceptable level of iron, insoluble matter, carbonate, and other contaminants depends on the mill’s chemical-recovery system and product-quality requirements. Buyers should request a certificate of analysis for every agreed specification, particularly when deposits, color, or recovery efficiency are sensitive.
Sodium sulfide can be used as a sulfiding agent or flotation modifier in the treatment of certain sulfide and oxide ores. Its performance depends on mineralogy, water chemistry, dosage control, oxidation conditions, and the overall reagent scheme. A material that is suitable for one ore body may not deliver the same result for another, so I consider laboratory or plant-scale validation essential for a new source.
Na2S may serve as a sulfur source or reducing reagent in the manufacture of selected inorganic and organic chemicals, dyes, pigments, and intermediates. It may also be used in some wastewater-treatment or metal-processing systems where sulfide chemistry is appropriate. The buyer must verify compatibility with the process because sulfide reactions can produce precipitates, odor, heat, or hazardous gas if conditions are not controlled.
Solid material is commonly supplied as flakes, lumps, or other defined particle forms. Flakes can simplify weighing and feeding, while smaller particles may dissolve more quickly but can create more dust during handling. Packaging should protect the product from moisture and air because exposure can affect appearance, composition, and storage stability.
Sodium sulfide may be supplied in hydrated form, and the water of crystallization changes the relationship between product mass and active Na2S. This is a critical comparison issue: two products with the same quoted weight may contain different active sulfide amounts. I ask for the chemical form and active-content calculation before making a price-per-ton comparison.
Solution products can reduce the need for onsite dissolution and may be easier to dose through a metering system. They also contain a defined percentage of active material and a significant quantity of water, which affects freight cost, storage volume, freezing risk, and tank design. The supplier should state concentration, density at a specified temperature, packaging requirements, and stability guidance.
I normally compare Na2S industrial grade using a written specification rather than a product name. The core items are active assay, moisture or water content, sodium carbonate, sodium hydroxide, sodium thiosulfate, iron, insoluble matter, polysulfide content, particle size, and appearance. Not every application needs every test, but the buyer should identify which parameters can affect process performance or compliance.
If you are looking for more details, kindly visit Songyi.
| Specification area | Why it matters | Buyer question |
|---|---|---|
| Active Na2S assay | Determines effective chemical dosage | Is the result reported as-is, dry basis, or hydrate equivalent? |
| Moisture or solution concentration | Changes active content, handling, and freight economics | What test method and reference temperature are used? |
| Iron and insolubles | May affect color, deposits, filtration, or downstream quality | Are maximum limits stated in the COA? |
| Particle form and size | Influences feeding, dissolution, dust, and storage | Is the distribution controlled or only the visual form? |
| Packaging and shelf guidance | Protects material during storage and transport | What liner, net weight, and storage conditions are available? |
I also check whether the certificate of analysis includes a batch number, production date, test date, test method, and release status. A buyer should not assume that a specification applies to every production batch unless the supplier confirms the quality-control system and sampling plan. For hazard communication, the U.S. Occupational Safety and Health Administration provides requirements for safety data sheets and labels under the Hazard Communication Standard, 29 CFR 1910.1200. Source: OSHA Hazard Communication Standard.
First, I document the application, target dosage, operating pH, temperature range, dosing equipment, and acceptable impurity levels. I also record whether the process needs a solid or solution and whether the plant has suitable ventilation, gas detection, and chemical-resistant equipment. This prevents the purchasing team from comparing products on assay alone.
Next, I convert each quotation to a common active-chemical basis. For a solution, the active mass is influenced by concentration and density; for a hydrate or wet solid, moisture and water of crystallization must be considered. A useful commercial comparison is cost per metric ton of active Na2S, including packaging, inland transport, ocean freight, insurance, duties, and expected handling losses.
I request a current technical data sheet, SDS, sample certificate of analysis, packaging specification, and transport information. The documents should identify the product, hazard classification, recommended storage, first-aid measures, incompatible materials, and spill-response guidance. If a supplier cannot clearly explain the product form or assay basis, I treat that uncertainty as a sourcing risk.
For a new supplier, I start with a representative sample or trial shipment that matches the proposed commercial grade. I compare dissolution behavior, dosing stability, process response, odor control, residue, and final product effects against the incumbent material. The trial acceptance criteria should be written before testing so that the decision is based on measurable process requirements.
There is no reliable universal price for Na2S industrial grade because quotations vary by assay, hydrate status, physical form, origin, packaging, order volume, freight route, and delivery terms. Minimum order quantity may also differ between a factory shipment, distributor order, trial quantity, and containerized export shipment. I recommend asking for at least three commercial scenarios: sample or trial quantity, one full shipment, and a recurring monthly requirement.
Lead time should be confirmed in writing from order confirmation to cargo readiness, not described only as a general estimate. Buyers should also ask about production scheduling, batch allocation, port availability, dangerous-goods documentation, and the validity period of the quotation. For imported material, a lower ex-works price can become less competitive after special packaging, inland transport, customs handling, and storage costs are included.
At Songyi, I recommend beginning with the buyer’s process and documentation requirements rather than proposing a generic grade. Our role as an industrial chemical supplier is to clarify the required form, active-content basis, packaging, target market, and delivery terms so that a quotation can be evaluated on a comparable basis. Availability, specifications, and export arrangements should be confirmed for each order instead of assumed from a general product description.
One common mistake is comparing “high purity” claims without a defined assay method or impurity table. Another is ordering a hydrate or solution after comparing its nominal price with an anhydrous solid price, which can distort the actual cost of active chemical. Buyers also sometimes overlook moisture protection and storage capacity, even though these factors can influence product condition and operating continuity.
A further mistake is treating sodium sulfide as an ordinary alkaline powder. Acid contact can produce hydrogen sulfide, and workplace exposure limits and emergency controls must be addressed through the site’s safety program. The National Institute for Occupational Safety and Health provides an authoritative immediately dangerous to life or health value of 100 parts per million for hydrogen sulfide, while local legal limits may differ. Source: NIOSH Pocket Guide, Hydrogen Sulfide.
I advise storing solid Na2S in a dry, well-ventilated area with suitable secondary containment and clear separation from acids and incompatible oxidizing materials. Containers should remain closed when not in use, and the site should control moisture exposure, dust, access, and spill response. For solutions, the buyer should additionally confirm tank material compatibility, pump design, temperature limits, and concentration changes caused by evaporation or dilution.
Before shipment, the importer should verify the applicable dangerous-goods classification, UN transport entry, packing instruction, labeling, and destination-country requirements with the supplier and qualified logistics provider. These requirements can vary according to concentration, hydrate or solution form, transport mode, and jurisdiction. I do not treat a general product webpage as a substitute for the shipment-specific SDS and transport documents.
The best Na2S industrial grade is not necessarily the product with the highest stated assay or lowest quoted price. I select it by matching the chemical form and active content to the process, defining critical impurities, confirming safety and transport documentation, and validating performance through a controlled trial. This approach reduces the risk of buying an unsuitable hydrate, solution concentration, particle form, or impurity profile.
To request a quotation from Songyi, prepare your intended application, required product form, assay or concentration target, estimated quantity, packaging preference, destination, and documentation needs. We can then review the specification basis and identify the information needed for a comparable industrial supply proposal. Final product availability, commercial terms, lead time, and compliance documents should be confirmed before purchase.
Are you interested in learning more about Na2s Industrial Grade? Contact us today to secure an expert consultation!