无水四硼酸钠

性状描述: 无臭、无色、半透明、味咸的晶体或白色晶状粉末。微溶于乙醇，微溶于冷水，易溶于热水。
沸点：1575℃
熔点：741℃
折光率: 1.501
密度：  2.367

质量标准: anhydrous, ≥99%：


外观Appearance                          白色结晶
纯度Purity                              ≥99.0%
重金属Heavy metals (as Pb)              
<50 ppm >水中不溶物Insoluble matter in H2O      
<0.05 % >痕量分析Trace analysis :
Cl                                     < 500 ppm
PO4                                    < 50 ppm
Ca                                     < 200 ppm
Fe                                     < 50 ppm
Cu                                     < 50 ppm
K                                      < 500 ppm
Mg                                     < 200 ppm
Ni                                     < 50 ppm
Pb                                     < 50 ppm



99.995% metals basis:


外观Appearance                          White Powder
X-射线衍射分析X-Ray Diffraction         Conforms to Structure
纯度Purity                              ≥99.995% Based on Trace Metals Impurities  
Titration by NAOH (% B)                 21.0 - 22.0 %
ICP:                                    Confirms Na and B Components Confirmed
痕量金属分析total metallic impurities   ≤50ppm by By ICP and
  AA Combined
(Ba、Ca、Cr、Cu、Fe、Mg、Zn、Li、K、Rb、Cs)

储存条件: 易吸潮，密封保存。

用途: 供医药、冶金、鞣革、陶瓷、纺织及制食物保存剂用。