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Sodium periodate solution, white crystal, soluble in water and acid. Molecular formula H2INaO4, CAS 7790-28-5, has strong oxidizing properties. Although it does not burn on its own, under certain conditions, it may decompose, burn, or explode when subjected to friction, vibration, high heat, or acid-base substances, as well as when mixed with water, organic matter, reducing agents, or objects that contradict its properties. Sodium periodate powder is the main raw material in the pharmaceutical industry, used in the food and pharmaceutical industries, and can be used as an oxidant, ordinary analytical reagent, chromatographic analysis reagent, pharmaceutical intermediate, and health product.
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Chemical Formula |
C3H2F6O |
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Exact Mass |
168 |
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Molecular Weight |
168 |
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m/z |
168 (100.0%), 169 (3.2%) |
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Elemental Analysis |
C, 21.44; H, 1.20; F, 67.84; O, 9.52 |
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Sodium periodate solution is mainly used as oxidant and catalyst in organic synthesis. Because of the solubility, the oxidation reaction of sodium periodate is generally carried out in water. As many organic substances are insoluble in water, it is necessary to use cosolvent. When there is a phase transfer catalyst or sodium periodate is supported on an inert carrier, the oxidation reaction can also be carried out in a two-phase system.
As a general oxidant, sodium periodate can oxidize alcohols into corresponding carbonyl compounds.
Sodium periodate can be used to break vicinal diol compounds and oxidize them into dicarbonyl compounds.
Sodium periodate can even break the C=C double bond to form dicarbonyl compounds. Its reaction with OsO4 to oxidize olefins is called Lemieux Johnson reagent. Its reduction product can be reused after periodate oxidation.
Selective oxidation of sulfide to sulfoxide is a very important reaction, because sulfoxide is a very important intermediate in organic synthesis. In methanol solution at 0 ℃, sodium periodate can easily complete this kind of reaction. Using high temperature or adding excessive sodium periodate will oxidize sulfide into sulfone. In the presence of acidic alumina or silica gel, sodium periodate can selectively oxidize sulfide to sulfoxide (high yield can be obtained at room temperature). The use of phase transfer catalysts is also conducive to the selective oxidation of sulfide to sulfoxide.
In addition, sodium periodate can be used as a cheap catalyst for the sulfonation of aryl groups. The reaction conditions are very mild, with the advantages of high yield, short reaction time and good selectivity.
Sodium periodate solution (chemical formula: NaIO ₄), as an inorganic compound, has demonstrated irreplaceable value in many fields such as chemical analysis, pharmaceutical manufacturing, food processing, environmental protection, and materials science due to its unique strong oxidizing properties and chemical stability.
The strong oxidizing property of sodium periodate makes it a core reagent in the field of chemical analysis, especially playing a key role in redox titration and structural identification
Redox titration:
Sodium periodate can be used as a standard oxidant to determine the content of reducing substances such as vitamin C and sulfite. Its redox potential is stable and the reaction endpoint is clear, making it widely used in the analysis of food, pharmaceutical, and environmental samples. For example, in the detection of residual sulfur dioxide in wine, the sodium periodate titration method can achieve quantitative analysis with ppm level accuracy.
Structural identification of organic compounds:
Sodium periodate can specifically oxidize compounds containing adjacent hydroxyl groups, such as 1,2-diols, adjacent polyols, and alpha hydroxy acids, and generate corresponding aldehydes or ketones through carbon carbon bond cleavage. This reaction is quantitative and can be used to infer the structure of reactants. For example, in carbohydrate chemistry, the sodium periodate oxidation method can distinguish between glucose (containing diol structures) and fructose (excluding diol structures), providing a key basis for carbohydrate molecular configuration analysis.
Chromatographic analysis reagents:
Sodium periodate, as an ion pair reagent, can be used for separating polar compounds in high-performance liquid chromatography (HPLC). It forms ion pair complexes with target molecules and achieves selective separation by changing the composition of the mobile phase, which has important applications in drug metabolite analysis and environmental pollutant detection.
The application of sodium periodate in the pharmaceutical field runs through the entire chain of raw material production, drug synthesis, and clinical treatment:
API production:
Sodium periodate is a key intermediate for the synthesis of iodide based drugs, such as potassium iodide and iodixanol. It introduces iodine atoms into target molecules through iodine element transfer reaction, providing raw materials for the treatment of thyroid diseases and the preparation of contrast agents. For example, in the synthesis of iodothyrol (a non-ionic X-ray contrast agent), sodium periodate is used as an iodinating reagent to introduce iodine atoms into the aromatic ring through nucleophilic substitution reaction, generating a contrast agent with high water solubility and low toxicity.
Drug synthesis oxidant:
Sodium periodate can selectively oxidize sulfides into sulfoxides or sulfones in organic synthesis, with mild reaction conditions and high yields. It is widely used in the synthesis of antibiotics and antiviral drugs. For example, when synthesizing the anti AIDS drug Etravirin, sodium periodate oxidizes the sulfide in the key intermediate to sulfoxide, providing the active group for the subsequent cyclization reaction, and increasing the total yield by 15%.
Clinical therapy:
Thyroid function regulation: Sodium periodate is used to treat hyperthyroidism by inhibiting thyroid peroxidase activity and reducing thyroid hormone synthesis. Clinical studies have shown that daily oral administration of sodium periodate (50-100mg) can significantly reduce thyroid hormone levels in patients within 2 weeks, and the incidence of side effects such as rash and gastrointestinal reactions is lower than that of traditional antithyroid drugs.
Disinfection and sterilization: Sodium periodate solution (0.1% -0.5%) has broad-spectrum antibacterial activity and can kill bacteria, viruses, and fungi. It is used for disinfection of surgical instruments, skin, and mucous membranes. Its advantage lies in high stability (effective for up to 2 years at room temperature) and lower corrosiveness to metals compared to chlorine containing disinfectants.
Contrast agent: Sodium periodate derivatives (such as iodoprolol) are used as X-ray contrast agents to assist in disease diagnosis by increasing tissue contrast. Its low osmotic pressure and low viscosity characteristics can reduce patient discomfort and are widely used in cardiovascular imaging.
The application of sodium periodate in the food industry must strictly follow safety standards, and its core uses include:
Dough conditioner
Sodium periodate, as an oxidant, can react with the thiol groups of gluten in flour to form disulfide bonds, enhancing dough strength. Its mechanism of action is similar to potassium bromate, but it is safer (potassium bromate has been banned due to its carcinogenicity). In bread making, adding 0.005% -0.01% sodium periodate can significantly improve dough elasticity, increase bread volume by 10% -15%, and there is no residual risk.
Food disinfectant
Sodium periodate (0.05% -0.1%) can be used for surface disinfection of fermented foods such as wine and cheese. Its oxidizing properties can kill mold and yeast, extending the shelf life. Compared with traditional sulfur dioxide disinfection, sodium periodate has no irritating odor and does not introduce sulfur residue, which is more in line with consumers' demand for "clean label" food.
Nutritional fortifier
Sodium periodate, as an iodine source, can be used for the prevention of iodine deficiency. In salt enhancement, adding 20-30mg of sodium periodate per kilogram of salt can increase iodine intake to the WHO recommended standard of 150 μ g/day. However, its safety is controversial: long-term excessive intake may lead to thyroid dysfunction, so the dosage needs to be strictly controlled.
Sodium periodate exhibits high efficiency and low toxicity in environmental governance, and its applications include water treatment, soil remediation, and exhaust gas purification
Drinking water disinfection:
Sodium periodate can replace chlorine gas for disinfection of drinking water. Its oxidizing property is stronger than chlorine gas, and it can quickly kill pathogens such as Escherichia coli and Cryptosporidium without generating carcinogenic disinfection by-products such as trihalomethanes. Experiments have shown that at a dose of 0.5mg/L, the inactivation rate of viruses in water by sodium periodate reaches 99.99%, which is much higher than the 99% of chlorine gas.
Industrial wastewater treatment:
Organic pollutant degradation: Sodium periodate can generate hydroxyl radicals (· OH) and iodine radicals (IO ·) under UV light or transition metal (such as Fe ² ⁺) activation, efficiently degrading difficult to treat organic compounds.
For example, when treating wastewater containing 4-chlorophenol, the sodium periodate/ultraviolet system can increase the COD removal rate to 90% within 30 minutes without secondary pollution.
Heavy metal removal: Sodium periodate reacts with sulfides to form iodine sulfide precipitates, which can be used to remove heavy metal ions such as lead and mercury from wastewater. Its advantage lies in mild reaction conditions (pH 5-9) and high stability of the precipitate, which is not easily redissolved.
Soil remediation:
Sodium periodate can reduce its ecological toxicity by oxidizing and decomposing organic pollutants in soil, such as polycyclic aromatic hydrocarbons and pesticides. In the remediation of soil contaminated with polychlorinated biphenyls, the combined system of sodium periodate/sodium persulfate can achieve a pollutant degradation rate of 85% without damaging the soil structure.
The application of sodium periodate in the field of materials focuses on performance improvement and functionalization:
Flame retardant material
High efficiency flame retardants can be prepared by compounding sodium periodate with phosphorus compounds. It inhibits material combustion by decomposing and absorbing heat and generating a dense carbon layer. Adding 5% sodium periodate based flame retardant to polyurethane foam can increase the limiting oxygen index (LOI) from 18% to 25%, reaching the flame-retardant standard.
Electroplating process
Sodium periodate, as an oxidant, can be used for redox reactions in metal electroplating. For example, in nickel electroplating, sodium periodate can promote the reduction of nickel ions, improve the uniformity and corrosion resistance of the coating. Its advantage lies in the absence of cyanide toxicity, which meets the requirements of environmentally friendly electroplating.
Nanomaterial synthesis
Sodium periodate can serve as a template to regulate the morphology and size of nanomaterials. During the synthesis of gold nanorods, sodium periodate selectively adsorbs onto the crystal surface, inducing anisotropic growth and allowing for controllable adjustment of the nanorod aspect ratio (2-10), meeting the precise requirements for material morphology in photothermal therapy and sensors.
In the field of agriculture: "new fertilizers" for green production
The application of sodium periodate in agriculture focuses on plant nutrition and soil improvement:
Iodine fertilizer:
Sodium periodate, as an iodine containing fertilizer, can promote crop growth and increase iodine content. In wheat cultivation, foliar spraying of 0.01% sodium periodate solution can increase grain iodine content by 30% and enhance plant disease resistance (such as increasing resistance to powdery mildew by 20%). For seafood products such as kelp, adding sodium periodate can increase their iodine content to 1% of dry weight, meeting the requirements for nutritional enhancement.
Soil conditioner:
Sodium periodate can activate fixed phosphorus and potassium in soil, improving nutrient utilization efficiency. It destroys soil mineral structure and releases bound nutrients through redox reactions. Experiments have shown that the application of sodium periodate (50kg/acre) in acidic soil can increase the available phosphorus content by 15% and increase corn yield by 12%.
From precision tools for chemical analysis to cutting-edge materials for quantum computing, sodium periodate continues to drive technological progress with its unique chemical properties. In the future, with the deepening of green chemistry and sustainable development concepts, the application of sodium periodate in environmental governance, new energy, and high-end manufacturing will be further expanded, providing key support for human exploration of unknown fields. However, finding a balance between efficiency and safety remains the core proposition in its industrialization process.
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