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Aluminum sulfate octadecahydrate

Cas:
7784-31-8
Molecular Structure:
MDL:
MFCD00149136
Molecular Formula:
Al2(SO4)3•18H2O
Molecular Weight:
666.41
Alias:
Trade termforalum
Product order:
Name Specifications Packing Price Delivery
Aluminum sulfate octadecahydrate 99.95% metals basis 100G RMB 286 Consulting service
Aluminum sulfate octadecahydrate AR 500g RMB 52.8 Consulting service
Aluminum sulfate octadecahydrate GR 500g RMB 61.6 Consulting service
Aluminum sulfate octadecahydrate ACS 500g RMB 66 Consulting service
Character:
白色无定形结晶或颗粒和粉未,有甜味。溶于水,不溶于醇。逐渐加热熔解,250℃失去水分,加热时分解。在空气中稳定,当相对湿度约20%时风化。比重为 1.69。在空气中长期存放易吸结块,脱水温度为86.5℃,能溶于水、酸和碱,不溶于醇,水溶液呈酸性,具有酸而涩的味道。加热到530℃时开始分解,860℃分解结束,分解最终产物为r-Al2O3,、高纯硫酸铝在水解过程中,首先生成中间产物碱式盐,然后生成氢氧化铝。
熔点:86℃
Quality Standard:
HG/T3-929-76
项目Item                               分析纯      化学纯
                    (AR)             (CP)
含量[Al2(SO4)3•18H2O]Assay,%           ≥99.0            99.0
水溶液反应Soluble reaction               合格      合格
澄清度试验Clarity                        合格      合格
水不溶物lnsoluble matter in water,%    ≤0.02            0.05
氯化物(Cl)Chloride,%                   ≤0.002           0.01
铵盐(NH4)Ammonium,%                    ≤0.005           0.02
铁(Fe)lron,%                           ≤0.003           0.01
碱金属及碱土金属(以硫酸盐计)Alkali
and earths,%                           ≤0.25            0.5
重金属(以Pb计)Heavy metals,%           ≤0.001           0.002

项目名称Item                                           ACS Grade
含量[以已标记结晶水记]Al2(SO4)3•18H2O]Assay              98.0-102.0%
水不溶物Insoluble matter                                 ≤0.01%
氯化物(Cl)Chloride(Cl)                                   ≤0.005%
钙(Ca)Calcium(Ca)                                        ≤0.01%
镁(Mg)Magnesium(Mg)                                      ≤0.002%
钾(K)Potassium(K)                                        ≤0.005%
钠(Na)Sodium(Na)                                         ≤0.02%
重金属(以Pb计)Heavy metals(as Pb)                        ≤0.001%
铁(Fe)Iron(Fe)                                           ≤0.002%

Storage:
密封保存。
用作制白色鞣革、纸上浆、媒染剂、净水剂、防水剂、澄清剂、石油除臭剂、沉淀剂等。 
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