无色结晶或白色斜方晶系结晶。 溶于水，呈微碱性。不溶于乙醇，微溶于氨。
熔点  698 °C(lit.) 
密度  4.18  
溶解度  H2O: 1 M at 20 °C, clear, colorless 
水溶解性  730 g/L (20 ºC)

99.995% metals basis：


外观Appearance                                       白色粉末、结晶或块状
纯度Purity                                                  ≥99.995% Based On Trace Metals Analysis of ICP
ICP:                                                            Confirms Tungsten Component Confirmed 
钨W                                                             54.3 - 57.1 % (With Cinchonine)
痕量金属分析Trace Metal Analysis        ≤60ppm by ICP Atomic emission
(B、Ba、Ca、Co、Cr、Cu、K、Ni、Ti)
项目Item　　　　　　　　              分析纯　　 化学纯
                                                                (AR)        (CP)
含量(Na2WO4·2H2O)Assay,%      ≥99.5      99.0
碱性试验Akali test                                合格      合格
氯化物(Cl)Chloride,%                        ≤0.005     0.007
硫酸盐(SO4)Sulfate,%                        ≤0.01      0.02
氮化合物(N)Nitrogen,%                       ≤0.001     0.004
铁(Fe)Iron,%                                         ≤0.0005    0.0001
钼(Mo)Molybdenum,%                          ≤0.001     0.005
砷(As)Arsenic,%                                    ≤0.0005    0.0005
重金属(以Pb计)Heavy metals,%         ≤0.0005    0.0002



品级Grade                                                  ACS级  
                                                            (ACS, 99.0-101.0% ) 
外观Appearance                                白色结晶或结晶粉末
X-射线衍射分析X-Ray Diffraction           Conforms to Structure
纯度Purity                                            99.0 - 101.0 % (Gravimetric Analysis)
不溶物Insoluble matter                    ≤0.01 % 
氯Chloride Content                         ≤0.005 % 
重金属和铁Heavy Metals and Iron (as Lead) ≤0.001 % 
钼Molybdenum                                ≤0.001 % 
硫酸根Sulfate (SO4)                       ≤0.01 % 
可滴定碱Titratable base                 ≤0.02 meq 

危险品标志         Xn 
危险类别码        22-36/38 
安全说明          36-37/39-26 
WGK Germany  1 
RTECS           YO7900000 
海关编码        28418000 

用途  用于金属钨、钨酸及钨酸盐类的制造。用做媒染剂、颜料和催化剂。还可做织物防火剂以及分析化学试剂。 
用途  用于制造金属钨、钨酸、钨酸盐、染料、油墨、催化剂等 
 
应储存在阴凉干燥的库房内，勿使铁桶破裂，保持包装完好，注意防潮，勿与酸类共储混运。