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Chromium(III) potassium sulfate dodecahydrate

Cas:
7788-99-0
Molecular Structure:
MDL:
MFCD00149917
Molecular Formula:
CrKO8S2.12H2O; CrK(SO4)2?12H2O
Molecular Weight:
499.40
Alias:
硫酸鉀鉻,鉻礬,鉻明礬,鉀鉻礬 Chrome alum Potassium chromium(III) sulfate dodecahydrate
Product order:
Name Specifications Packing Price Delivery
Chromium(III) potassium sulfate dodecahydrate AR 500g RMB 74.8 Consulting service
Chromium(III) potassium sulfate dodecahydrate CP 500g RMB 66 Consulting service
Chromium(III) potassium sulfate dodecahydrate ACS 500g RMB 88 Consulting service
Character:
紫紅色到黑色八面立方大結(jié)晶塊,易風(fēng)化。在透射光下呈寶石紅色,加熱到100oC失去部分結(jié)晶水而變綠色,110℃時得二水物,350℃時變成無水物呈淺黃綠色,并失去水溶性。溶于水和稀酸,不溶于醇,能溶于4份冷水、2份沸水,幾乎不溶于醇。其水溶液冷時呈紫色,熱時呈綠色。
熔點:89℃
Quality Standard:
Q/(HG)SJ766-1998 HG3-916-76
項目ltem                             分析純      化學(xué)純
                    (AR)              (CP)
含量Assay,%                          ≥99.5              99.0
水不溶物lnsoluble matter in water,%  ≤0.005             0.01
氯化物(Cl)Chloride,%                 ≤0.002             0.005
銨鹽(NH4),%                          ≤0.01              0.03
鋁(AL)ALuminum,%                     ≤0.02              0.05
鐵(Fe)Iron,%                         ≤0.005             0.02
重金屬(以Pb計)Heavy metals,%         ≤0.002             0.01

ACS級
項目名稱                          ACS Grade
含量Assay                             98.0-102.0%
氯化物(Cl)Chloride                   ≤0.002%
鋁(Al)Aluminum                       ≤0.02%
鐵(Fe)Iron                           ≤0.01%
銨鹽(NH4)Ammonium                    ≤0.01%
重金屬(以Pb計)Heavy metals(as Pb)    ≤0.01%

Storage:
密封保存。
顯微分析用固著劑,皮革,制備其他鉻鹽。
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