Sodium sulfite

About: Sodium sulfite is a research topic. Over the lifetime, 2548 publications have been published within this topic receiving 18523 citations. The topic is also known as: Na2SO3 & Anhydrous sodium sulfite.

Formaldehyde scavenging agent and preparing method thereof

Abstract: The invention relates to the chemical industry field, in particular to a formaldehyde scavenging agent and a preparing method of the formaldehyde scavenging agent. The formaldehyde scavenging agent comprises, by weight, 10 parts to 200 parts of multi-amidocyanogen compounds, 10 parts to 50 parts of sodium sulfite, 10 parts to 100 parts of organic solvents and 20 parts to 200 parts of deionized water. The formaldehyde scavenging agent and the preparing method of the formaldehyde scavenging agent have the advantages that due to the fact that formaldehyde can easily react with the organic matter containing amidocyanogen, the reaction equation is H2N-R+HCHO->RHN-CH2-OH, and the concentration of free formaldehyde can be reduced to be within a limited range by adding the excess multi-amidocyanogen compounds in the formaldehyde scavenging process. The multi-amidocyanogen compounds can be easily oxidized and lose activity, sodium sulfite can protect the multi-amidocyanogen compounds in the formula against oxidization, and therefore the product state of the organic solvents can be kept constant.

Potential of Sodium Sulfite Catalyzed with Cobalt Chloride in Harvesting Fish

Abstract: (1969). Potential of Sodium Sulfite Catalyzed with Cobalt Chloride in Harvesting Fish. The Progressive Fish-Culturist: Vol. 31, No. 3, pp. 149-154.

Mechanism of the inhibition of phloem loading by sodium sulfite: Effect of the pollutant on the transmembrane potential difference

Abstract: Sodium sulfite (Na2SO3) decreased uptake from 1 mM sucrose by the parenchyma and by the veins of leaves of broadbean (Vicia faba L. cv. Aguadulce). The decrease depended on the concentration of the pollutant and the duration of pretreatment. The inhibition was non-competitive. Sulfite affected the transmembrane potential difference (PD) of the leaf tissues. The short-term response obeyed an ‘all or nothing’ law. At 0.1 mM and above, sulfite led to a quick depolarization of one-third of the initial potential after a lag phase of about 5 min; for concentrations lower than 0.1 mM, sulfite did not affect the potential. By contrast, the long-term effect of Na2SO3 on the transmembrane PD strongly depended on its concentration. After 2–12 h of pretreatmemt there was no effect at 10 μM, a weak effect at 0.1 mM, and then increasing depolarization as the pollutant concentration increased. The inhibitory effect of Na2SO3 on sucrose uptake is thus, at least partly, due to its effect on a component of the proton-motive force. ΔΨ. However, the lack of correlation noticed with 0.1 mM Na2SO3 between the effect on sucrose uptake and the long-term effect on transmembrane PD suggests numerous sites of sulfite action.

Preparation method of 2,4-dichloro-5-isopropoxy aniline salt

Abstract: The invention discloses a preparation method of 2,4-dichloro-5-isopropoxy aniline salt. The preparation method is characterized by comprising the following steps of: generating 2,4-dichloro-5-isopropoxy aniline by using 2,4-dichloro-5-isopropoxy nitrobenzene in the presence of polar solvent and water and under the reaction action of stannous chloride, sodium sulfide, sodium sulfite or sodium hyposulfate, adding aromatic hydrocarbon or chloroalkene solvent serving as an extracting agent, extracting, washing, acidifying, filtering, drying, and thus obtaining the 2,4-dichloro-5-isopropoxy aniline salt. Because the reducing agent, the polar solvent and the water are used in the reaction, risk is reduced in the production process of a production workshop, the environment is protected, massive iron cement is not produced, and the aniline salt reaches national standard. Therefore, the method is more reasonable in synthesis process, low in cost and high in quality, and is more suitable for industrialized production.