Calcium Sulfate Dihydrate

MDL：
MFCD00149625

Molecular Formula：
CaSO4·2H2O

Molecular Weight：
172.17

Alias：
生石膏,石膏,二水合硫酸钙 Calcium sulfate - precipitated

Product order：

Name	Specifications	Packing	Price	Delivery
Calcium Sulfate Dihydrate	AR	500g	RMB 33	Consulting service
Calcium Sulfate Dihydrate	CP	500g	RMB 22	Consulting service
Calcium Sulfate Dihydrate	GR	500g	RMB 33	Consulting service
Calcium Sulfate Dihydrate	ACS	500g	RMB 44	Consulting service

Character：
白色单斜结晶或结晶性粉末。无气味。有吸湿性。128℃失去1 1/2分子结晶水，163℃全部失水。溶于酸、硫代硫酸钠和铵盐溶液，溶于400份水，有热水中溶解较少，极慢溶于甘油，几乎不溶于醇和多数有机溶剂。有刺激性。
密度:2.32

Quality Standard：
Q/(HG)SJ 745-1997
项目Item                                        分析纯        化学纯
                                                 (AR)          (CP)
含量(CaSO4·2H2O)Assay,%　　　                  ≥99.0         97.0
澄清度试验Clarity                                 合格         合格
盐酸不溶物盐酸不溶物lnsoluble in dilute
hydrochloric acid,%                             ≤0.025        0.05
氯化物(Cl)Chloride,%                            ≤0.002        0.005
硝酸盐(NO3)Nitrate,%                            ≤0.002        0.005
铵盐(NH4)Ammonium,%                             ≤0.005        0.015
碳酸盐(CO3)Carbonate,%                          ≤0.05         0.1
铁(Fe)Iron,%                                    ≤0.0005       0.001
重金属(以Pb计)Heavy metals,%                    ≤0.001        0.002
碱金属及镁(MgO)Alkali metuls and                ≤0.2          0.5
magnesium,%                            

ACS级
项目名称Item                                                   ACS Grade
含量(CaSO4·2H2O)Assay                                         98.0-102.0%
稀盐酸不溶物Insoluble in dilute hydrochloric acid              ≤0.02%
氯化物(Cl)Chloride(Cl)                                         ≤0.005%
硝酸盐(NO3)Nitrate                                             Passes test
碳酸盐(以BaCO3计)Carbonate                                     Passes test
重金属(以Pb计)Heavy metals(as Pb)                              ≤0.002%
铁(Fe)Iron(Fe)                                                 ≤0.001%
镁(Mg)Magnesium(Mg)                                            ≤0.02%
钾(K)Potassium(K)                                              ≤0.005%
钠(Na)Sodium(Na)                                               ≤0.02%
锶(Sr)Strontium(Sr)                                            ≤0.05%

Storage：
密封保存。
氮肥生产分析微量一氧化碳和二氧化碳和二氧化碳作吸湿剂。涂料，人造象牙，油漆，造纸，染料，印花，冶金，处理水。