Sulfamic Acid (chemical formula: H3NSO3), also designated as amidosulfonic acid, is a highly versatile dry, non-volatile, odorless monoclinic crystalline strong mineral acid. Within high-tier industrial applications, it functions as an essential descaling agent, stabilizing catalyst, and chemical intermediate. Unlike standard liquid mineral acids (such as hydrochloric, nitric, or sulfuric acid), sulfamic acid offers distinct structural stability in solid form, rendering it exceptionally safe for handling, transportation, and custom packaging systems.
From a molecular perspective, sulfamic acid exhibits a zwitterionic structure where the nitrogen atom carries a partial positive charge and the oxygen atoms maintain a negative charge. This specific molecular geometry creates high solubility in water while suppressing the immediate volatility typically observed in hydrogen halide-based acids. Thus, when introduced to scale accumulations containing calcium carbonate, magnesium hydroxide, and iron oxides, it yields fast-acting chelation and neutralization reactions without releasing hazardous acid mist.
To assist global procurement directors in selecting the optimal acidic descaler or compound raw materials, the table below contrasts Sulfamic Acid with other traditional industrial acids:
| Property / parameter | Sulfamic Acid (H₃NSO₃) | Hydrochloric Acid (HCl) | Citric Acid (C₆H₈O₇) |
|---|---|---|---|
| Physical Form | Dry Crystalline Solid (Easy Handling) | Fuming Aqueous Solution | Crystalline Powder |
| Acid Strength (pKa) | 1.0 (Strong Mineral Acid) | -8.0 (Extremely Strong/Volatile) | 3.13 (Weak Organic Acid) |
| Descaling Efficiency | Excellent (Reacts quickly at room temp) | Rapid (But highly corrosive to substrate) | Moderate (Requires elevated temperature) |
| Metal Corrosion Risk | Low (Easily inhibited for steel/copper) | Extremely High (Pitting, embrittlement) | Very Low (But slow action) |
| Transportation Hazard | Class 8 (Solid, manageable hazard class) | Class 8 (Liquid, highly corrosive fumes) | Non-hazardous (Food grade profile) |
The primary commercial demand for sulfamic acid resides within industrial cleaning. When scaling compounds such as CaCO3 deposit on heat transfer surfaces (boilers, cooling towers, condensers, pipelines), they cause severe thermal resistance and system inefficiencies. Sulfamic acid reacts with calcium carbonate to form highly soluble calcium sulfamate salt:
This reaction progresses rapidly at ambient temperatures. By incorporating specific organic inhibitors, the corrosion rate of steel, stainless steel, brass, copper, and titanium alloys is reduced close to zero. Consequently, global OEMs prefer customized sulfamic acid formulations for safety-critical heat exchanger cleanouts, desalination plants, and marine cooling infrastructures.
Located in Zibo, Shandong—a major petrochemical and chemical hub of China—we possess direct pipeline and regional access to essential raw materials: high-purity urea and liquid sulfur trioxide / fuming sulfuric acid. This geographical proximity ensures cost-stable production and eliminates domestic freight bottlenecks, even during raw material market fluctuations.
Our production facilities utilize modern crystallization technology, pneumatic drying, and automatic packing machinery. The entire process is monitored by Distributed Control Systems (DCS), guaranteeing that the sulfamic acid crystals exceed 99.5% purity with ultra-low moisture and iron content, customized specifically for strict industrial standards.
We maintain regional warehousing facilities at primary maritime hubs—Qingdao Port and Tianjin Port—allowing us to achieve shipment dispatch times of less than 7 days. Furthermore, our strategic storage at Xinjiang border ports (Alashankou, Khorgos) provides direct railway and overland transport access to Central Asia and Europe, ensuring seamless intermodal freight.
Shandong Pulisi Chemical Co., Ltd. was established in 2006 (Stock Code: 307785). The company focuses on petrochemicals, mining chemicals, feed chemicals, and pharmaceutical chemicals. At present, the company has established long-term and stable partnerships with Fortune Global 500 companies such as China National Petroleum Corporation and Saint-Gobain. We always take customer demand as the core orientation and provide tailored solutions to help customers strengthen their market competitiveness.
The company has passed ISO9001:2015 Quality Management System Certification and German BV Certification, and has been awarded multiple honors such as Foreign-Oriented Economic Enterprise, Alibaba Demonstration Base, and Contribution Enterprise. In 2023, the company successfully went public with stock code: 307785.
The company upholds the corporate culture philosophy of “Customer First, Rapid Response; Striving as the Foundation, Efficient Collaboration; Integrity and Uprightness, Agile Adaptation.” We focus on providing compliant and high-quality products and supporting services, and are committed to becoming a long-term and stable partner for customers.
Meanwhile, the company has established mature warehousing and distribution systems at key logistics hubs, including Qingdao Port, Tianjin Port, and Xinjiang border ports (Alashankou, Khorgos). We are able to provide flexible supply solutions according to customer needs to ensure timely order delivery. No matter where customers are located, Shandong Pulisi Chemical will safeguard their business development with professional service systems and efficient response capabilities.
(Strict Statement: Shandong pulisi has not established branches outside of Shandong Province. If there is any act of impersonating Shandong Pulisi, our company will reserve the right to pursue legal responsibilities.)
Establishment Year
Years Industry Experience
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Global Partner Companies
As regulatory scrutiny intensifies over toxic liquid acids like Hydrochloric Acid, the market for solid organic and inorganic acids with lower ecological toxicity is expanding rapidly. The industrial application profiles of sulfamic acid have transitioned from traditional regional descaling to specialized global supply sectors:
In the paper pulp whitening process, sulfamic acid serves to prevent the degradation of cellulose molecules by stabilizing heavy metals and chlorine ions. It minimizes fiber degradation (loss of tensile strength) and helps paper mills reduce their overall AOX (adsorbable organic halides) emissions to meet stringent environmental standards.
In the synthesis of organic azo dyes and organic pigments, excess nitrite ions must be removed following diazotization. Sulfamic acid reacts selectively with nitrous acid, forming nitrogen gas and dilute sulfuric acid, avoiding side reactions and increasing the structural purity of the dyes.
For deep oil well formations rich in carbonates, sulfamic acid is formulated into high-temperature acidizing fluids. It dissolves carbonate rocks to open up channels for crude oil and gas extraction while presenting significantly lower corrosion rates on downhole metallic casings compared to HCl, even under elevated temperatures.
The global shift toward green chemicals is propelling sulfamic acid into new niches. Key trends include:
Procuring chemical bulk products across continental borders demands stringent compliance pathways. At Shandong Pulisi Chemical Co., Ltd., we have established a dedicated global compliance team that addresses international protocols on chemical safety, labeling, and reporting.
We actively monitor EU-REACH and maintain K-REACH compliance structures for our partners in South Korea. This minimizes importing holds and guarantees smooth regulatory clearances for commercial operations.
Our OEM capabilities accommodate customized moisture-barrier packaging. We offer 25kg PE-lined bags, 500kg and 1000kg high-strength PP jumbo bags, as well as customized private label printing to match regional retail or regulatory specifications.
Because Sulfamic Acid is naturally hygroscopic, it is prone to clumping under humid cargo conditions. We provide proprietary anti-caking agent options that keep the crystalline acid free-flowing throughout long-haul sea transits.
Exporting to more than 100 countries and regions with fully integrated border clearance support.
More than 20+ years of export experience, maintaining active partnerships with over 1,000 global companies.
ISO Certification | SGS certification | K-REACH Registration support | FAMI-QS Certification for feed compliance.
We always provide reasonable prices based on customization and design requirements with high-volume stability.
We have large warehouses in the main port, which can realize fast transportation and rapid vessel loading.
Efficient and professional sales team offer complete after-sale service and real-time transit updates.
Of course you can. We support custom OEM bag designs, private labels, and multi-language warnings to align with the regulatory compliance standards of your destination country. Just send us your logo design and text requirements.
If you are a small retailer, regional distributor, or startup, we would absolutely love to grow with you. We offer flexible MOQ arrangements to help you run initial trials and build long-term trading relations.
We always put our customers' interests first. Prices are negotiable based on order volume, package sizes, contract duration, and current raw material conditions. We guarantee that you will receive a highly competitive price structure.
Yes, we provide free samples (typically 500g to 1kg) for laboratory verification and chemical analysis before confirming final shipping agreements. Shipping costs are negotiable.
We maintain active regional storage at major ports (Qingdao, Tianjin) and along land-border gateways. Our team manages customs clearance and documentation, allowing us to load and dispatch cargoes promptly and securely.
We accept T/T (Telegraphic Transfer), L/C (Letter of Credit) at sight or deferred, D/P (Documents Against Payment), and O/A (Open Account) terms depending on the buyer's credit evaluations.
Absolutely, you are welcome to visit our company in Zibo, Shandong Province, China. We are situated about 1.5 hours' drive from Jinan Airport. We can arrange site visits to our production facilities and testing laboratories.
You can send an inquiry directly to our sales representatives through the website form. Please specify your purity requirements, desired packaging type, expected quantity, and discharge port, and we will get back to you with a detailed proposal.
We offer registration support depending on the target export territory. For European and Korean markets, we coordinate with accredited Only Representatives (OR) to ensure import limits and documentation comply with chemical registration laws.
For destinations characterized by high humidity, we utilize specialized moisture-proof PE liners. We also offer options containing food-grade or industrial anti-caking agents that keep the crystals free-flowing and ready for direct unloading.
Pulisi
