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Sodium tungstate dihydrate

MDL:
--MFCD00149190
Molecular Formula:
Na2WO4·2H2O
Molecular Weight:
329.85
Alias:
钨酸钠二水合物 相关CAS:13472-45-2 Tungstic acid sodium salt dihydrate Sodium wolframate tungstic acid disodium salt sodium tungstate
Product order:
Name Specifications Packing Price Delivery
Sodium tungstate dihydrate AR 500g RMB 220 促销
Sodium tungstate dihydrate AR 100g RMB 68.2 促销
Character:
白色具有光泽的片状结晶或结晶粉末,溶于水呈微碱性,在干燥空气中风化,100℃时失去结晶水,变成无水物,遇酸则分解为溶于水的钨酸。能溶于水,不溶于醇, 微溶于氨。比重3.245。有毒。
熔点:698℃
Quality Standard:
 
   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


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)

Storage:

用途  主要用于金属钨、钨酸及钨酸盐的制造以及染料、颜料、油墨、电镀等 方面。也用于织物和纤维素的防火剂,催化剂等。电镀级和催化剂等用途必须选择分析纯。
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