Sodium tetraborate decahydrate

MDL：
--MFCD00149193

Molecular Formula：
Na2B4O7·10H2O

Molecular Weight：
381.37

Alias：
硼砂,四硼酸钠(十水),黄月砂,硼砂(药用),月石砂,四硼酸钠 Borax decahydrate Sodium borate decahydrate

Product order：

Name	Specifications	Packing	Price	Delivery
Sodium tetraborate decahydrate	ACS	500g	RMB 38.5	现货
Sodium tetraborate decahydrate	AR	500g	RMB 27.5	现货

Character：
无色半透明的结晶或白色结晶性粉末,易溶于热水及甘油，不溶于醇，有风化性。水溶液对石蕊和酚酞呈碱性反应。水溶液显钠盐与硼酸盐的鉴别反应。在空气中易吸水，形成部分水合物，并变成不透明。缓慢溶于水。
密度：1.73
熔点：75℃

Quality Standard：
   
   GB/T 632-93
项目Item                               优级纯     分析纯    化学纯
                                        (GR)       (AR)      (CP)
含量(Na2B4O7·10H2O)Assay,%            ≥99.5       99.5      99.0
澄清度试验Clarity                       合格       合格      合格
盐酸不溶物Insiluble matter
in hydrochloric,%                     ≤0.003     0.005      0.02  
氯化物(Cl)Chloride,%                  ≤0.0005    0.002      0.005
硫酸盐(SO4)Sulfate ,%                 ≤0.005     0.01       0.015
磷酸盐(PO4)Phosphate,%                ≤0.001     0.002      0.005
钙(Ca)Calcium,%                       ≤0.001     0.005      0.02
铁(Fe)Iron,%                          ≤0.0001    0.0003     0.0005
铜(Cu)Copper,%                        ≤0.0005    0.001      0.002
铅(Pb)Lead,%                          ≤0.0005    0.001      0.002

ACS级
项目名称　                                       ACS Grade
含量(Na2B4O7·10H2O)Assay                       99.5-105.0%
pH(0.01M,25.0℃).pH of a 0.01M solution         9.15-9.21(25.0℃)
水不溶物Insoluble matter                        ≤0.005%
氯化物(Cl)Chloride                              ≤0.001%
磷酸盐(PO4)Phosphate                            ≤0.001%
硫酸盐(SO4)Sulfate                              ≤0.005%
钙(Ca)Calcium                                   ≤0.005%
重金属(以Pb计)Heavy metals                      ≤0.001%
铁(Fe)Iron                                      ≤5ppm

基准试剂PT
纯度Assay: 　                                　99.95-100.05%
            

Storage：
密封保存。
用途  色层分析试剂，缓冲剂，金属助熔剂。