Molecular Formula：
Na2B4O7·10H2O

Molecular Weight：
381.37

Alias：
硼砂,四硼酸鈉(十水),黃月砂,硼砂(藥用),月石砂,四硼酸鈉 Borax decahydrate Sodium borate decahydrate

Product order：

Name	Specifications	Packing	Price	Delivery
Sodium tetraborate decahydrate	GR	500g	RMB 35	Consulting service
Sodium tetraborate decahydrate	ACS	500g	RMB 38.5	Consulting service
Sodium tetraborate decahydrate	AR	500g	RMB 27.5	Consulting service

Character：
無(wú)色半透明的結(jié)晶或白色結(jié)晶性粉末,易溶于熱水及甘油，不溶于醇，有風(fēng)化性。水溶液對(duì)石蕊和酚酞呈堿性反應(yīng)。水溶液顯鈉鹽與硼酸鹽的鑒別反應(yīng)。在空氣中易吸水，形成部分水合物，并變成不透明。緩慢溶于水。
密度：1.73
熔點(diǎn)：75℃

Quality Standard：
GB/T 632-93
項(xiàng)目Item                               優(yōu)級(jí)純     分析純    化學(xué)純
                                        (GR)       (AR)      (CP)
含量(Na2B4O7·10H2O)Assay,%            ≥99.5       99.5      99.0
澄清度試驗(yàn)Clarity                       合格       合格      合格
鹽酸不溶物Insiluble matter
in hydrochloric,%                     ≤0.003     0.005      0.02  
氯化物(Cl)Chloride,%                  ≤0.0005    0.002      0.005
硫酸鹽(SO4)Sulfate ,%                 ≤0.005     0.01       0.015
磷酸鹽(PO4)Phosphate,%                ≤0.001     0.002      0.005
鈣(Ca)Calcium,%                       ≤0.001     0.005      0.02
鐵(Fe)Iron,%                          ≤0.0001    0.0003     0.0005
銅(Cu)Copper,%                        ≤0.0005    0.001      0.002
鉛(Pb)Lead,%                          ≤0.0005    0.001      0.002

ACS級(jí)
項(xiàng)目名稱　                                       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%
磷酸鹽(PO4)Phosphate                            ≤0.001%
硫酸鹽(SO4)Sulfate                              ≤0.005%
鈣(Ca)Calcium                                   ≤0.005%
重金屬(以Pb計(jì))Heavy metals                      ≤0.001%
鐵(Fe)Iron                                      ≤5ppm

基準(zhǔn)試劑PT
純度Assay: 　                                　99.95-100.05%
            

Storage：
密封保存。
用途  色層分析試劑，緩沖劑，金屬助熔劑。