1.06657

亚硫酸钠

anhydrous for analysis EMSURE^® Reag. Ph Eur

• 线性分子式: Na₂SO₃
• CAS号: 7757-83-7
• 分子量: 126.04
• MDL號碼: MFCD00003503
• 分類程式碼代碼: 12352302
• 酶委員會索引編號: 231-821-4
• NACRES: NA.21

属性

• agency: reag. Ph. Eur.
• 品質等級: 300
• 產品線: EMSURE^®
• 化驗: 97.0-100.5% (iodometric)
• 形狀: powder
• 效力: 2610 mg/kg LD₅₀, oral (Rat)
• 雜質: ≤0.005% Insoluble matter; ≤0.03 meq/g Titrable free base
• pH值: 8.8-10 (20 °C, 50 g/L in H₂O)
• mp: >500 °C (decomposition)
• 密度: 2.63 g/cm³ at 20 °C
• 體積密度: 1480 kg/m³
• 負離子痕跡: chloride (Cl^-): ≤0.02%; thiosulfate (S₂O₃^2-): ≤0.1%
• 正離子痕跡: As: ≤0.0001%; Cu: ≤0.0005%; Fe: ≤0.001%; Pb: ≤0.0005%; Se: ≤0.0004%; Zn: ≤0.001%; heavy metals (as Pb): ≤0.0005%
• 儲存溫度: 2-30°C
• SMILES 字串: [Na+].[Na+].[O-]S([O-])=O
• InChI: 1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
• InChI 密鑰: GEHJYWRUCIMESM-UHFFFAOYSA-L

说明

應用

• Structural Properties and Hydrolysability of Paulownia elongate: The Effects of Pretreatment Methods Based on Acetic Acid and Its Combination with Sodium Sulfite or Sodium Sulfite: This study investigates how acetic acid and sodium sulfite pretreatments affect the structural properties and enzymatic hydrolysis of fast-growing Paulownia elongate. The combination significantly improved cellulose content and enzymatic digestibility, demonstrating potential for efficient sugar production (Wang et al., 2022).
• Effects of oxygen scavengers (Sodium sulfite, sodium bisulfite, sodium dithionite, and sodium metabisulfite) on growth and accumulation of biomass in the green alga Asterarcys quadricellulare: This research explores the impact of various oxygen scavengers on the biomass growth of the green alga Asterarcys quadricellulare. Sodium sulfite was one of the compounds tested for enhancing biomass accumulation (Sudha et al., 2022).
• A novel photo-assisted activated persulfate strategy for selective oxidation of ammonia nitrogen to dinitrogen using sodium silicate and sodium sulfite as regulators: This paper presents a new strategy for the selective oxidation of ammonia nitrogen to dinitrogen. Sodium sulfite was used as a regulator to enhance the efficiency of the process (Zhang et al., 2024).
• Effectiveness of sodium sulfite as an electron acceptor for bioenhanced treatment of salt-containing water produced from ASP flooding: This study examines the role of sodium sulfite as an electron acceptor in the bioenhanced treatment of saline water from alkaline-surfactant-polymer flooding. The findings suggest improved treatment efficiency with sodium sulfite addition (Zhang et al., 2021).

分析報告

含量测定（碘量滴定法）：97.0 - 100.5 %
鉴别：通过测试
溶液外观：通过测试
不溶物质： ≤ 0.005 %
游离酸：通过测试
可滴定游离碱： ≤ 0.03 meq/g
氯化物（Cl）： ≤ 0.02 %
硫代硫酸盐（S₂O₃）： ≤ 0.1 %
重金属（以铅计）： ≤ 0.0005 %
As（砷）： ≤ 0.0001 %
Cu（铜）： ≤ 0.0005 %
Fe（铁）： ≤ 0.001 %
Pb（铅）： ≤ 0.0005 %
Se（硒）： ≤ 0.0004 %
Zn（锌）： ≤ 0.001 %

法律資訊

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

安全信息

• 儲存類別代碼: 13 - Non Combustible Solids
• 水污染物質分類（WGK）: WGK 1
• 閃點（°F）: Not applicable
• 閃點（°C）: Not applicable