MDL：
MFCD00149625

Molecular Formula：
CaSO4·2H2O

Molecular Weight：
172.17

Alias：
生石膏,石膏,二水合硫酸鈣 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：
白色單斜結(jié)晶或結(jié)晶性粉末。無氣味。有吸濕性。128℃失去1 1/2分子結(jié)晶水，163℃全部失水。溶于酸、硫代硫酸鈉和銨鹽溶液，溶于400份水，有熱水中溶解較少，極慢溶于甘油，幾乎不溶于醇和多數(shù)有機溶劑。有刺激性。
密度:2.32

Quality Standard：
Q/(HG)SJ 745-1997
項目Item                                        分析純        化學純
                                                 (AR)          (CP)
含量(CaSO4·2H2O)Assay,%　　　                  ≥99.0         97.0
澄清度試驗Clarity                                 合格         合格
鹽酸不溶物鹽酸不溶物lnsoluble in dilute
hydrochloric acid,%                             ≤0.025        0.05
氯化物(Cl)Chloride,%                            ≤0.002        0.005
硝酸鹽(NO3)Nitrate,%                            ≤0.002        0.005
銨鹽(NH4)Ammonium,%                             ≤0.005        0.015
碳酸鹽(CO3)Carbonate,%                          ≤0.05         0.1
鐵(Fe)Iron,%                                    ≤0.0005       0.001
重金屬(以Pb計)Heavy metals,%                    ≤0.001        0.002
堿金屬及鎂(MgO)Alkali metuls and                ≤0.2          0.5
magnesium,%                            

ACS級
項目名稱Item                                                   ACS Grade
含量(CaSO4·2H2O)Assay                                         98.0-102.0%
稀鹽酸不溶物Insoluble in dilute hydrochloric acid              ≤0.02%
氯化物(Cl)Chloride(Cl)                                         ≤0.005%
硝酸鹽(NO3)Nitrate                                             Passes test
碳酸鹽(以BaCO3計)Carbonate                                     Passes test
重金屬(以Pb計)Heavy metals(as Pb)                              ≤0.002%
鐵(Fe)Iron(Fe)                                                 ≤0.001%
鎂(Mg)Magnesium(Mg)                                            ≤0.02%
鉀(K)Potassium(K)                                              ≤0.005%
鈉(Na)Sodium(Na)                                               ≤0.02%
鍶(Sr)Strontium(Sr)                                            ≤0.05%

Storage：
密封保存。
氮肥生產(chǎn)分析微量一氧化碳和二氧化碳和二氧化碳作吸濕劑。涂料，人造象牙，油漆，造紙，染料，印花，冶金，處理水。