|
HS Code |
817261 |
| Chemical Name | Sodium Hydrosulfite |
| Molecular Formula | Na2S2O4 |
| Purity | 88% |
| Appearance | White to grayish powder |
| Molecular Weight | 174.1 g/mol |
| Solubility In Water | Soluble |
| Odor | Slight sulfurous odor |
| Melting Point | Decomposes before melting |
| Density | 2.19 g/cm³ |
| Main Use | Reducing agent in textile and paper industries |
| Cas Number | 7775-14-6 |
| Stability | Unstable when exposed to air or moisture |
| Storage Conditions | Store in a cool, dry, well-ventilated area |
| Ph Of 1 Solution | Around 7–9 |
| Hazard Class | Class 4.2 (Spontaneously combustible solid) |
As an accredited Sodium Hydrosulfite 88% factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sodium Hydrosulfite 88% is securely packed in a 50 kg net weight iron drum with double polyethylene inner liner for moisture protection. |
| Shipping | Sodium Hydrosulfite 88% is shipped in tightly sealed, moisture-proof containers such as fiber drums or kraft bags with inner polyethylene liners to prevent moisture ingress and decomposition. It should be stored and transported in cool, dry, well-ventilated areas, away from heat, direct sunlight, and incompatible substances, following hazardous materials regulations. |
| Storage | Sodium Hydrosulfite 88% should be stored in a cool, dry, well-ventilated area away from heat, moisture, and incompatible materials such as strong acids and oxidizers. Keep the container tightly closed and covered to prevent moisture absorption and decomposition. Store in original packaging and avoid exposure to direct sunlight. Ensure proper labeling and keep away from sources of ignition or open flames. |
Applications of Sodium Hydrosulfite 88% in Industrial ManufacturingKnown for its strong reducing properties and reliable performance in large-scale processes, our Sodium Hydrosulfite 88% is adopted by major manufacturers in textile treatment, paper pulping, mineral processing, and kaolin bleaching industries. The following sections outline its industry-specific role across key manufacturing fields, with a focus on standards, dosage regimes, integration points, and end-product output. 1. Textile Dyeing and Printing Reduction CleaningTextile mills leverage Sodium Hydrosulfite for vat dye reduction and color stripping after printing, ensuring precise and level shade development in cellulosic fabrics. Its rapid and controlled reduction action meets quality requirements for demanding textile finishing operations, particularly in indigo denim production and discharge printing for synthetic blends. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
2. Pulp and Paper BleachingPaper manufacturers use Sodium Hydrosulfite as a primary reductive bleaching agent for deinking and brightness improvement of recycled and mechanical pulps. Its application minimizes residual lignin chromophores, allowing mills to meet international quality and optical brightness targets for printing and packing grades with reduced ecological impact. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
3. Kaolin and China Clay Industry (Minerals Bleaching)Ceramic and paper pigment manufacturers rely on Sodium Hydrosulfite to bleach natural kaolin clays by reducing iron and titanium color bodies, thereby delivering consistently higher mineral whiteness and improving clay’s market value in premium fillers and coatings for paper, ceramics, and paint applications. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
4. Chemical and Pharmaceutical Intermediates ProductionProducers of specialty intermediates use Sodium Hydrosulfite in reduction steps for synthesizing dyes, pharmaceuticals, and agrochemical building blocks. Its performance enables controlled conversion of nitro compounds and azo linkages at industrial scales, where reaction selectivity and by-product minimization drive process yields and downstream compliance for regulated markets. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
5. Leather Processing – Dye Stripping and BleachingTanneries incorporate Sodium Hydrosulfite for post-dye stripping, level-off bleaching, and correction of uneven coloration on leather hides. Its use helps maintain the structural integrity and appearance of finished leather articles, responding to stringent quality standards for dye-fastness and hygienic safety in global leather goods supply chains. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
|
Competitive Sodium Hydrosulfite 88% prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615371019725 or mail to sales7@bouling-chem.com.
We will respond to you as soon as possible.
Tel: +8615371019725
Email: sales7@bouling-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Sodium hydrosulfite, also known by its chemical formula Na2S2O4, has grown alongside the history of textile and paper processing. Decades in this field have shown us one truth: consistent performance defines value in industrial chemicals. Our Sodium Hydrosulfite 88% stands at the center of this standard. Below, we’ll dive deeper into its specific strengths, the role played every day across industries, and highlight what sets our approach apart from others.
Chemical manufacturing rewards reliability. Sodium hydrosulfite comes in different purity grades, and the 88% model finds its place as a workhorse. This specific concentration is engineered around typical needs of dyeing and bleaching operations. Stable shipping and robust shelf-life mean less uncertainty for plant managers planning their raw material supply.
Not all sodium hydrosulfite powders carry the same weight. We achieve the 88% active content using a combination of optimized batch reaction and proprietary drying techniques. Our approach targets proper particle size distribution that keeps caking and dust to a minimum—two traits operators bring up in the field more often than suppliers may realize. Consistency in bulk density matters both in automated dosing systems and manual handling, which is shaped by our granulation strategy during production.
Sodium hydrosulfite plays a foundational role in textile dyeing, mainly as a reliable reducer for vat dyes and indigo. Textile plants depend on reducing agents to keep colorants soluble, drive color development, and clear excess dye at wash-off. The rise of denim, both mass-market and boutique, has only increased the pressure for predictable reduction performance. Our teams have collaborated with fabric finishers who lost entire batches due to overlooked purity or failing strength mid-process. Controlling active content at 88% reduces this risk, balancing potency with manageable handling.
Paper mills also run their own unique challenges. Brightness reversion in mechanical pulp, especially in recycled grades, can reduce product appeal and even market value. Sodium hydrosulfite’s ability to target and neutralize residual lignin turns out to be critical. We have worked closely with technical specialists in Asia and Europe to tailor our drying process so that our product disperses rapidly even in high-consistency systems, which helps when targeting brightness targets efficiently without excessive overdosing.
Other users tap into the reductive power for specialty chemical syntheses, water treatment, and gas purification. These settings demand a product that won’t introduce unwanted by-products. Attention to sodium, sulfate, and trace impurities at the manufacturing level pays off every step downstream, especially in batch processes where variability multiplies cost.
Sodium hydrosulfite appears in the market at several purities: 85%, 88%, 90%, and up into specialty grades. Each has supporters for their own reasons, and decision points usually come down to handling, reactivity, and price. Experience shows that high-purity grades such as 90%+ can offer a slight edge in reduction strength, but with greater sensitivity to moisture and air. The added cost may only make sense for applications like electronics or delicate pigment production.
Our 88% specification sits in a sweet spot. Ultra-high grade hydrosulfite can save a step in some high-end dye baths but often brings headaches with dusting and rapid degradation under poor storage. On the other end, lower concentration grades like 85% might shave costs for bulk paper production but can translate to more residue and higher sulfate loading. Technical teams running indigo lines or paper brightening tell us that the 88% grade balances shelf-life stability, shipping robustness, and ease of metering.
Producers often downplay the operational impact of small variances between grades, but plant engineers know the reality. Slightly higher moisture content in a lower purity material may seem trivial but results in unexpected dosing adjustments and process fluctuations. We keep an eye on these practical impacts because, in daily industrial work, even small gains in predictability matter.
Running a sodium hydrosulfite plant calls for discipline. The wet-to-dry transformation must be controlled tightly. We use continuous reaction vessels monitored by on-stream analytics to keep batch-to-batch variations in check. The entire team knows that a simple drift in holding temperature or flow speed can knock final purity mentions off-target, drive up sulfate by-products, and degrade long-term storage strength.
Experience highlights the value of precise air exclusion at every stage. The main risk to sodium hydrosulfite lies with oxidation from air or uncontrolled moisture. To counter this, we adopted inert gas blanketing in our systems. Granulation happens right after the main reduction phase finishes, limiting atmospheric exposure. We prefer packaging in sealed, moisture-resistant drums and bags because we’ve seen the product degrade rapidly in less-protected forms.
End users also get support from our on-the-ground technical teams. We draw from operational data and user feedback to adjust production for infrastructure quirks in different regions. In one example, higher humidity during a South Asian rain season led us to tweak our anti-caking agent blend, which cut clumping by half without affecting reactivity. These are the realities you face when you actually make the product and ship it worldwide.
It rarely takes long for someone using sodium hydrosulfite in their process to run into tough spots. A common theme: stability under real-world storage and handling. We’ve received calls from textile operators frustrated by hydrosulfite from other sources degrading right when a rush order hits. This kind of disruption often comes down to hidden factors—minor moisture ingress during shipping or a change in warehouse protocol.
Maintaining strength and flowability means controlling not just production parameters, but logistics and shelf conditions. We carry out accelerated aging simulations using ambient and controlled-temperature chambers before approving batches. This kind of detail signals to plant teams that the input won’t create its own problems. Facility managers can plan inventory buys with less risk—unexpected loss of active content can throw off ratios in dye baths and chemical mixes.
Surface contamination or packaging failures also undermine process efficiency. In our line, packages are filled in an isolation zone with automated sealing. Bags or drums get coded for immediate trace-back. Our quality system does not end on the factory floor; it follows outbound logistics till the customer’s site. The knowledge gained from lost batches and customer downtime has directly influenced how we streamline preventive controls, sometimes investing in more robust bag linings or heavier drum coatings than competitors willing to cut those corners.
Global competition drives relentless pressure to shave cents from process inputs. The real winners, though, are rarely those who take the lowest offer without checking the trade-offs. We worked with a dye house that struggled for months with a cheaper, lower-grade hydrosulfite. Hidden costs popped up—filters gummed up, increased cleaning cycles, and a higher reject rate due to incomplete dye reduction.
A better-matched input can help keep total expense down rather than focusing purely on price per kilogram. Our teams worked on-site to bring that plant back in line, matching our 88% product to their process monitoring software and optimizing their dosing protocol. Downtime hours dropped, and the team reduced overall chemical demand by fine-tuning based on more consistent quality.
In the paper industry, the direct link between brighter pulp and higher selling prices for newsprint is well established. Our sodium hydrosulfite lets customers hold tighter control on brightness indices, reducing the tendency for “yellowing” of final products. This, in turn, gives paper producers better leverage in contract pricing and market differentiation.
Market stability means everyone benefits. Consistent, high-quality sodium hydrosulfite allows end-users to commit to tighter contract terms, which can improve long-term planning. We have seen this firsthand with major textile and pulp groups who build medium-term supply agreements on reliability and technical backup, reducing their risk exposure to price spikes or emergency resupply. The stability in upstream chemical quality creates a cascade of value downstream.
More companies are under scrutiny to align with sustainability mandates across the supply chain, sodium hydrosulfite included. Our plants operate under strict local and international environmental controls, which dictate everything from effluent handling to energy use. We have invested in heat recovery systems and water recycling inside our processing streams, reducing our environmental footprint year over year.
We see a trend toward higher regulatory standards for chemical purity and safe logistics. Several regions require tighter tracking of reducing agents, especially as import/export regulations evolve. We keep a dedicated compliance team plugged into regulatory bodies, and we adapt packaging and documentation rapidly to keep cargo moving without delays. Our in-house traceability system helps cut through red tape for customers in heavily regulated markets.
Circular economy pressure pushes us to reduce waste streams at every stage. Spent sodium hydrosulfite can carry environmental risk if mishandled, so we work with major users to design on-site neutralization solutions. Proper handling at end-of-life, along with safe storage in the plant, drives both environmental stewardship and risk mitigation. Experiencing these transitions in real-world operations gives us confidence reporting progress, rather than just pledging intentions.
Advances often come from direct lines of communication between chemical manufacturers and end-users. We have streamlined our R&D after gathering input from dye house leaders, paper mill engineers, and specialty chemical formulators. Much of our product improvement can be traced back to operators suggesting changes that support batch flow, easier dissolution, or more robust packaging.
One example comes from denim laundry lines struggling with rapid degradation of sodium hydrosulfite under ambient factory conditions. For these users, tweaking our dehydration and anti-caking agents made double-digit improvement in storage half-life, all while keeping the reduction strength in a competitive range. Change doesn’t always arise from top-down engineering reviews; it grows out of field-level realities and shared problem-solving.
Shared innovation also shapes broader supply chain dynamics. A technical team from a global pigment company worked with us for a year to develop a cleaner grade suited for their color mixing facility. Achieving low impurity levels meant reworking our filtration and washing stages—no small task for an operation serving multiple markets. The work paid off, leading to a new application area and a tighter partnership for years to come.
For those making purchasing decisions, brand statements and certificates only go so far. Experienced plant teams know the difference comes out on the floor, not on the datasheet. Whether running 24-hour dye lines in Southeast Asia or operating specialty paper mills in North America, most teams want steady supply with predictable performance. We built our operations around this principle.
The road has not always been smooth; feedback, both positive and critical, shapes our approach. We revise process parameters, batch testing routines, and packaging systems based on dozens of plant visits annually. This practical grounding drives our confidence in recommending sodium hydrosulfite 88% for mainstream reduction applications, and our technical team stands behind every shipment.
Trust flows from results in the field. Customers who experience performance improvement—reduced waste, higher process uptime, better batch consistency—tend to stick around. Our commitment to listening, refining processes, and following up on performance sets our product apart in a global environment crowded with claims.
Coming from a manufacturer’s perspective, several questions loom as guiding lights for continued improvement. How can production processes shrink environmental impact with no trade-off to product strength? What investments in automation or data analytics best support consistent output? Can further refinements in packaging and supply chain practice stave off storage and transportation losses?
We look at these challenges as massive opportunities. By fostering closer relationships with customers, encouraging feedback, and keeping investment focused on operational soundness, we keep sodium hydrosulfite 88% future-ready. Innovation, safety, and market reliability build on hard lessons from practical experience—not just theory or marketing.
The chemical industry stands in the middle of transformative shifts—greater competition, higher technical standards, and new environmental challenges. Sodium hydrosulfite, overlooked by some as an “old” commodity, actually remains vital for so many modern industries. Choosing a manufacturer that tunes production to match real plant experiences means minimizing surprises and maximizing value with every order.
Our journey making sodium hydrosulfite 88% has led us to refine every variable that matters to plant managers. The conversations and trust developed over years, sometimes decades, push us toward more sustainable and innovative production. Companies that commit to partnership and real-world feedback outlast those selling on price alone. Standing behind product performance, sharing risk, and delivering value beyond the shipment—that’s how we see our work on sodium hydrosulfite 88% every day.
