无水亚硫酸钠 (CAS No.7757-83-7)
- 物化性质
- 白色结晶性粉末或单斜晶体,相对密度2.633,熔点约500℃(分解)。易溶于水,水溶液呈碱性;微溶于乙醇,不溶于液氨。在空气中易风化并氧化成硫酸钠。遇酸分解放出二氧化硫,具有强还原性。分子量126.04。
- 技术参数
- 含量(以Na2SO3计)≥99.0% 水不溶物≤0.01% 铁(Fe)≤0.001% 重金属(以Pb计)≤0.001% 砷(As)≤0.0002%
English description(英文原文,共 1049 字符)
Product Name:Sodium sulfite
English Name:Sodium sulfite
CAS No.:7757-83-7
Aliases:Anhydrous sodium sulfite, Disodium sulfite, Sulfurous acid disodium salt
Molecular Formula:Na2SO3
Physical Properties:White crystalline powder or monoclinic crystals; relative density 2.633; melting point approximately 500 °C (decomposes). Freely soluble in water forming an alkaline solution; slightly soluble in ethanol; insoluble in liquid ammonia. Readily effloresces in air and oxidizes to sodium sulfate. Decomposes with acids releasing sulfur dioxide; strong reducing agent. Molecular weight 126.04.
Uses:Primarily used as a reducing agent, bleaching agent and developer. It is applied in pulp bleaching in the paper industry, dechlorination and oxygen removal in water treatment, reduction in chemical synthesis, as well as photographic development, food preservation and antioxidant applications.
Technical Specifications:
Assay (as Na2SO3) ≥99.0%
Water insoluble matter ≤0.01%
Iron (Fe) ≤0.001%
Heavy metals (as Pb) ≤0.001%
Arsenic (As) ≤0.0002%
English Name:Sodium sulfite
CAS No.:7757-83-7
Aliases:Anhydrous sodium sulfite, Disodium sulfite, Sulfurous acid disodium salt
Molecular Formula:Na2SO3
Physical Properties:White crystalline powder or monoclinic crystals; relative density 2.633; melting point approximately 500 °C (decomposes). Freely soluble in water forming an alkaline solution; slightly soluble in ethanol; insoluble in liquid ammonia. Readily effloresces in air and oxidizes to sodium sulfate. Decomposes with acids releasing sulfur dioxide; strong reducing agent. Molecular weight 126.04.
Uses:Primarily used as a reducing agent, bleaching agent and developer. It is applied in pulp bleaching in the paper industry, dechlorination and oxygen removal in water treatment, reduction in chemical synthesis, as well as photographic development, food preservation and antioxidant applications.
Technical Specifications:
Assay (as Na2SO3) ≥99.0%
Water insoluble matter ≤0.01%
Iron (Fe) ≤0.001%
Heavy metals (as Pb) ≤0.001%
Arsenic (As) ≤0.0002%
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常见问题
- 无水亚硫酸钠的 CAS 号是多少?
- 无水亚硫酸钠的 CAS 号是 7757-83-7。
- 无水亚硫酸钠的分子式和分子量是什么?
- 无水亚硫酸钠的分子式为 Na2SO3。
- 无水亚硫酸钠的英文名称是什么?
- 无水亚硫酸钠的英文名称为 Sodium sulfite。
- 无水亚硫酸钠还有哪些别名?
- 无水亚硫酸钠又称 亚硫酸钠、硫养粉。
- 无水亚硫酸钠有哪些供应商和生产厂家?
- 掌上化工当前收录 1 条无水亚硫酸钠供应报价,来自 1 家供应商,可按地区、纯度、级别筛选对比。
- 无水亚硫酸钠的供应商主要分布在哪些地区?
- 无水亚硫酸钠的供应商主要分布在 上海市(1 条) 等地。
- 无水亚硫酸钠有哪些级别可选?
- 平台上无水亚硫酸钠的供应级别包括 工业级。
- 无水亚硫酸钠的报价单位是什么?
- 无水亚硫酸钠的报价单位主要有 千克。
- 哪里可以查到无水亚硫酸钠的价格?
- 掌上化工无水亚硫酸钠产品页汇总了各供应商的最新报价与规格,地址:/chemicals/7757-83-7/。部分供应商价格为电议,可通过页面上的询价功能直接获取。
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