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Tungstic acid

Cas:
7783-03-1
Molecular Structure:
MDL:
MFCD00011336
Molecular Formula:
H2WO4
Molecular Weight:
249.86
Alias:
Product order:
Name Specifications Packing Price Delivery
Tungstic acid GR,99% 500g RMB 528 现货
Tungstic acid 99.95% metals basis 100g RMB 198 现货
Tungstic acid 99.999% metals basis 5g RMB 869 Consulting service
Character:
黄色至浅绿色粉末。加热至100-110℃缓慢地成脱水状态(2WO3.H2O),高热即由nWO3.H2O变成三氧化钨。溶于氢氟酸,缓溶于苛性碱溶液,不溶于水和其他酸类。有刺激性。
密度:5.5
熔点: 100°dec.
沸点: 1473°
折光率: 2.24 
Quality Standard:
99%:

外观Appearance                          黄色至黄橙色粉末
X-射线衍射分析X-Ray Diffraction         Conforms to standard
ICP                                     Confirms
纯度Purity                              >99.0% (T)
不溶于NaOH物质insoluble matter in NaOH  ≤0.2%
干燥损失loss on ignition                ≤8%
  


项目                                    分析纯  
                                        (AR)
钙calcium                              ≤0.01%  
磷phosphorus                           ≤0.01%  
硫化合物sulfur compounds               ≤0.02%  
钼molybdenum                           ≤0.02%  
砷arsenic                              ≤0.02%  
铁iron                                 ≤0.005%  
灼烧残渣residue on ignition            ≤0.15%  
灼烧失重calcination loss               7.0~15.0%

99.999% metals basis:


外观Appearance                          Yellow Powder
X-射线衍射分析X-Ray Diffraction         Conforms to standard
纯度Purity                              ≥99.999% Based on Trace Metals Impurities of ICP
ICP Assay                               Confirms Tungstic component
痕量金属分析total metallic impurities   ≤20ppm by ICP Atomic emission

Storage:
密封保存。
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