If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf
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Agency
reag. Ph. Eur.
质量水平
产品线
EMSURE®
方案
97.0-100.5% (iodometric)
表单
powder
效能
2610 mg/kg LD50, oral (Rat)
杂质
≤0.005% Insoluble matter
≤0.03 meq/g Titrable free base
pH值（酸碱度）
8.8-10 (20 °C, 50 g/L in H2O)
mp
>500 °C (decomposition)
密度
2.63 g/cm3 at 20 °C
堆积密度
1480 kg/m3
痕量阴离子
chloride (Cl-): ≤0.02%
thiosulfate (S2O32-): ≤0.1%
痕量阳离子
As: ≤0.0001%
Cu: ≤0.0005%
Fe: ≤0.001%
Pb: ≤0.0005%
Se: ≤0.0004%
Zn: ≤0.001%
heavy metals (as Pb): ≤0.0005%
储存温度
2-30°C
SMILES字符串
[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 key
GEHJYWRUCIMESM-UHFFFAOYSA-L
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应用
- 兰考泡桐的结构特性和水解性：乙酸和亚硫酸钠的预处理方法的效果: 本研究探讨了乙酸和亚硫酸钠预处理对速生兰考泡桐（Paulownia elongate）结构特性和酶水解的影响。两者的组合显著提高了纤维素含量和酶消化率，证明了其具有高效产糖的潜力(Wang et al., 2022)。
- 除氧剂（亚硫酸钠、亚硫酸氢钠、连二亚硫酸钠和焦亚硫酸氢钠）对绿藻生物量增长和蓄积的影响: 本研究探讨了各种除氧剂对绿藻（Asterarcys fourcelllare）生物量增长的影响。亚硫酸钠是用来测试生物量蓄积度增长的化合物之一(Sudha et al., 2022)。
- 一种新型的光辅助活化过硫酸盐策略，使用硅酸钠和亚硫酸钠作为调节剂，将氨氮选择性氧化为二氮: 本文提出了一种可以将氨氮选择性地氧化为氮气的新手段。亚硫酸钠是用来测试生物量蓄积度增长的化合物之一(Sudha et al., 2024)。
- 亚硫酸钠电子受体对三元复合驱含盐水生物强化处理的有效性: 本研究考察了作为电子受体的亚硫酸钠在碱性表面活性剂-聚合物冲洗（alkaline-surfactant-polymer flooding）的盐水生物强化处理中的作用。研究结果表明，添加亚硫酸钠可以提高处理效率（Zhang et al., 2021）。
分析说明
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 %
法律信息
储存分类代码
13 - Non Combustible Solids
WGK
WGK 1
闪点(°F)
Not applicable
闪点(°C)
Not applicable
其他客户在看
实验方案
Preparation of a standard solution for Sulfite
亚硫酸盐标准溶液制备
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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