一、化学名：硫酸钠
二、分子式：Na2SO4；Na2SO4·10H2O
三、分子量：无水：142.04；十水：322.20
四、CAS：无水：7757-82-6；十水：7727-73-3
五、性状：白色单斜晶系结晶或粉末，无臭。有苦咸味，相对密度2.68g/cm3，熔点884℃，溶于水，水溶液呈中性或弱碱性，溶于甘油，不溶于乙醇。暴露于空气中易吸湿成为含水硫酸钠。
六、用途：主要用于制造水玻璃、玻璃、瓷釉、纸浆、制冷混合剂、洗涤剂、干燥剂、染料稀释剂、分析化学试剂、医药品、饲料等。
七、包装：内衬聚乙烯塑料袋，外套复合塑料编织袋包装，每袋净重25kg。
八、贮存与运输：本品存放于干燥、通风、洁净库房；装卸运输轻拿轻放，避免包装破损；严防雨淋、受潮、受热，需与有毒化学品隔离存放运输。
| 质 量 指 标 | Specifications | GB 29209-2012 | 中国药典2025 | ||||
| 含量（Na2SO4，以干基计），w/% | Content ( Na2SO4, On dry basis ) , w/% | 99.0-100.5 | ≥99.0 | ||||
| 重金属（以Pb计），mg/kg ≤ | Heavy metals(as Pb),mg/kg ≤ | ———— | 10.0 | ||||
| 干燥减量，w/% | 无水 ≤ | Loss on drying,
w/% |
Anhydrous ≤ | 1.0 | 0.5 | ||
| 十水 | Decahydrate | 51.0-57.0 | 51.0-57.0 | ||||
| 氯化物（以Cl计），w/% | 无水 ≤ | Chlorides (as Cl) ,w/% | Anhydrous ≤ | ———— | 0.045 | ||
| 十水 ≤ | Decahydrate ≤ | ———— | 0.02 | ||||
| pH | pH | ———— | 通过试验 | ||||
| 澄清度试验 | Clarity Test | ———— | 通过试验 | ||||
| 钙（Ca），w/% ≤ | Calcium ( Ca ) , w/% ≤ | ———— | 0.02 | ||||
| 镁（Mg），w/% | 无水 ≤ | Magnesium ( Mg ) , w/% | Anhydrous ≤ | ———— | 0.02 | ||
| 十水 ≤ | Decahydrate ≤ | ———— | 0.01 | ||||
| 铁（Fe），w/% | 无水 ≤ | Iron(Fe),w/% | Anhydrous ≤ | ———— | 0.009 | ||
| 十水 ≤ | Decahydrate ≤ | ———— | 0.004 | ||||
| 铅（Pb），mg/kg ≤ | Lead ( Pb ) , mg/kg ≤ | 2.0 | ———— | ||||
| 硒（Se），mg/kg ≤ | Selenium ( Se ) , mg/kg ≤ | 30.0 | ———— | ||||
| 砷（As），mg/kg ≤ | Arsenic ( As ) , mg/kg ≤ | 3.0 | ——— | ||||
1、Chemical Name: Sodium Sulfate
2、Molecular Formula: Na2SO4 , Na2SO4·10H2O
3、Molecular Weight: Anhydrous: 142.04 ; Decahydrate:322.20
4、CAS: Anhydrous:7757-82-6 ; Decahydrate:7727-73-3
5、Character: It’s white monoclinic crystal or crystalline powder, odorless. It tastes bitter and salty. Relative density is 2.68g/cm3. Melting point is 884℃. It’s soluble in water and glycerin, insoluble in ethanol. Aqueous solution is alkaline. When exposed to air, it’ll easily absorb moisture and turn into aqueous Sodium Sulfate.
6、Usage: It is mainly used to make water glass, glass, enamel, pulp, refrigeration mixture, detergent, desiccant, dye diluent, analytical chemical reagent, medicine, feed, etc.
7、Packing: It is packed with polyethylene bag as inner layer, and a compound plastic woven bag as outer layer. The net weight of each bag is 25kg.
8、Storage and Transport: It should be stored in a dry and ventilative warehouse, kept away from heat and moisture during transportation, unloaded with care so as to avoid damage. Furthermore, it must be stored separately from poisonous substances.