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Sodium tetraborate decahydrate

Cas:
1303-96-4
Molecular Structure:
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。
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