China Factory Direct
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| CAS number | 27610-45-3 |
| Product name | SODIUM SULPHIDE HYDRATE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeIndustrial Grade |
| Packaging | 25KG/bag500KG/bag1000KG/bag |
| Sample | Test Samples Available (Click to Request Samples) |
| COA | View COA |
| Price | Get Quote |
| Supply Type | Bulk / Contract manufacturing / OEM |
| Shipping | FCL / LCL available |
| Payment Terms | Support FOB \ CIF \ EXW quotations, and accept Letter of Credit (L/C). |
| Manufacturer | Greenrock Chemical(China Factory) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Textile Industry | Used as a reducing agent in dye reduction dyeing processes | Post-dyeing treatment |
| Paper Industry | Applied in kraft pulping to decompose lignin | Pulping process |
| Chemical Synthesis | Employed as an intermediate in the production of sulfur dyes, sulfides, and other sulfur-containing compounds | Organic synthesis reaction |
| Mineral Processing | Used for flotation separation of non-ferrous metal ores (e.g., copper, lead, zinc) | Ore flotation |
| Water Treatment | Applied to remove heavy metal ions (e.g., mercury, cadmium) from wastewater | Precipitation treatment |
| Leather Industry | Used as a depilatory agent to decompose keratin in hides | Pre-tanning treatment |
| Rubber Industry | Applied as a vulcanization accelerator to facilitate rubber crosslinking | Rubber vulcanization process |
| Photography | Used as a component of fixer solutions to dissolve unexposed silver halides | Film processing |
| Metallurgical Industry | Used as a flux and sulfur substitute in metal smelting | High-temperature smelting |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Na2S Content | Acid-Base Titration | Direct titration with standardized HCl using starch-iodide indicator; Na2S reacts quantitatively to liberate H2S, which is oxidized by iodine. |
| Total Alkalinity | Acid-Base Titration | Titration with standardized HCl to phenolphthalein and methyl orange endpoints to determine total OH- and S2- contribution. |
| pH (10% w/w solution) | pH Meter Measurement | Electrochemical measurement of hydrogen ion activity in aqueous solution using calibrated pH electrode. |
| Water Content | Karl Fischer Titration | Volumetric or coulometric determination of water based on iodine-sulfur dioxide reaction in pyridine-methanol medium. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Quantification of trace heavy metals by measuring absorption of characteristic atomic vapor resonance lines. |
| Iron (Fe) | ICP-OES | Multi-element detection via emission intensity of excited Fe atoms/ions in high-temperature plasma. |
| Insoluble Matter | Gravimetric Analysis | Filtration of aqueous solution through pre-weighed sintered glass crucible, drying, and weighing of residue. |
| Sodium Thiosulfate (Na2S2O3) Impurity | Iodometric Titration | Oxidation of thiosulfate by iodine in presence of excess KI, followed by back-titration of unreacted iodine with sodium thiosulfate. |
| Sulfate (SO4) Content | Barium Sulfate Gravimetry | Precipitation of sulfate as BaSO4 in acidic medium, followed by filtration, drying, and weighing. |
| Chloride (Cl) Content | Potentiometric Titration with AgNO3 | Titration using silver nitrate and silver indicator electrode; endpoint detected by potential jump due to AgCl precipitation. |
| Appearance and Color | Visual Inspection | Comparison against standard color scale (e.g., APHA) under controlled lighting on clear aqueous solution. |
| Particle Size Distribution | Laser Diffraction | Analysis of light scattering pattern from dispersed particles to calculate size distribution based on Mie theory. |
| Test Item | Specification |
|---|---|
| Appearance | White to yellow solid |
| Purity | 60.0-64.0% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=3.0% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=1.0% |
| Odor | Characteristic sulfurous odor |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
1. How do you ensure product quality consistency?
We rely on a mature China-based manufacturing system and implement strict batch control and quality inspection for every shipment. Our production process complies with ISO 9001 standards, and a COA is provided for each batch to ensure consistent and reliable quality.
2. Do you offer competitive pricing for bulk orders?
Yes, as a China-based manufacturer and bulk supplier, we provide tiered pricing based on order volume. We support FOB and CIF quotations, as well as L/C payment terms for large transactions to meet international trade requirements.
3. Can you support large-volume or long-term supply?
We have stable production capacity and a well-established supply chain, enabling continuous bulk supply. We support ton-level and container-level orders, as well as long-term cooperation projects.
4. What is your typical lead time?
For in-stock products, shipment can be arranged within 1–3 days. For bulk packaging or customized orders, lead time depends on the specific quantity and production schedule.
5. What documents do you provide?
We can provide complete documentation upon request, including COA, SDS, TDS, and other compliance certificates, meeting industrial procurement and export requirements.
6. Can you customize product specifications or packaging?
Yes, we support customization of parameters such as purity, impurities, residual solvents, and heavy metals. We also offer various bulk packaging options, including 25kg bags, drums, and IBC tanks, suitable for industrial applications and transportation.
7. What shipping options do you support?
We support both FCL (Full Container Load) and LCL (Less than Container Load) shipments, and can flexibly arrange logistics solutions based on order size to meet bulk chemical export needs.
8. Do you provide technical or application support?
Yes, we provide basic application guidance and technical support based on industry experience to help customers optimize product usage.
9. How do you handle compliance and export regulations?
We are familiar with international trade and export regulations, ensuring all products comply with relevant requirements. We also provide complete documentation to support smooth customs clearance and global delivery.