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| 产品特点及用途Product characteristics and USES | ||||||||||
| 硫代硫酸钠（大苏打） 产品介绍 【产品性能及优点】无色单斜晶系结晶。无臭，有清凉带苦的味道。相对密度1.729（17℃）。熔点40－50℃。加热至100℃失去5个结晶水。易溶于水，水溶液近中性。溶于松节油及氨。不溶于醇。潮湿空气中有潮解性。在33℃以上的干燥空气中易风化。具有还原性，能溶解卤素及银盐。 质量指标
【产品适用范围】感光工业用作照相定影剂。造纸工业用作纸浆漂白后的除氯剂。分析化学用作色层分析、容量分析用试剂。医药上用作洗涤剂、消毒剂。食品工业用作抗氧化
The English version
Sodium thiosulfate, sodium hyposulphite) Product introduction Model ㎏ 25-50 ㎏ / bag of origin: guangzhou zengcheng Use level of industrial-grade levels above 98 (%) Transparent crystal granularity of implement quality standard gb (mesh) 【 product performance and advantages 】 colorless monoclinic system crystalline. Odourless, have cool and refreshing with a bitter taste. Relative density 1.729 (17 ℃). Melting point of 40-50 ℃. Heated to 100 ℃ lost five water of crystallization. Soluble in water, and nearly neutral aqueous solution. Is dissolved in turpentine oil and ammonia. Insoluble in alcohol. Deliquescence in moist air. Easy weathering in dry air more than 33 ℃. Has a reducing, can dissolve halogen and silver halide. Quality indicators Sodium thiosulfate % 98.0 or higher Water insolubles % 0.01 or less Sulfide % 0.001 or less Iron % 0.002 or less The ph 6.5 to 9.5 Product scope of application 】 【 photographic industry used as photographic fixing agent. Antichlor after the paper industry for pulp bleaching. Analytical chemistry with get worked up layer analysis, capacity analysis reagent. Medicine, used as a detergent, disinfectant. The food industry used as antioxidant |
