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Magnesium stearate

Cas:
557-04-0
Molecular Structure:
MDL:
MFCD00036391
Molecular Formula:
C36H70O4Mg;[CH3(CH2)16CO2]2Mg
Molecular Weight:
591.25
Alias:
十八酸鎂,二堿式硬脂酸鎂 Stearic acid magnesium salt
Product order:
Name Specifications Packing Price Delivery
Magnesium stearate AR 250g RMB 44 現(xiàn)貨
Magnesium stearate AR 1kg RMB 187 現(xiàn)貨
Magnesium stearate USP,EP 500g RMB 70.4 促銷
Character:
硬脂酸鎂外觀為細(xì)小的輕的白色粉末,手感滑膩,不溶于水、乙醇和乙醚,溶于熱水、熱乙醇,遇酸分解為硬脂酸和相應(yīng)的鎂鹽。有刺激性。
密度:1.028
熔點:130-140 ℃
Quality Standard:
項目                                             分析純
                                                  (AR)
純度Purity(Mg)                                   4.0%~5.0%(絡(luò)合法Complexometry)
外觀Appearance                                   細(xì)小,輕的白色粉末
干燥失重Loss on drying                           <6 %(1 g, 105°C)
重金屬Heavy metals                               ≤0.001%
痕量分析Trace analysis :
鉛Pb                                             < 10 ppm
氯Cl                                             < 0.1 %
硫酸根SO4                                        ≤0.5%
砷(As)                                           ≤3mg/kg
硬脂酸和棕櫚酸相對含量stearic and palmitic acid  ≥90.0%
硬脂酸Stearic acid                               ≥40.0%(GC)


品級Grade                                       Ph. Eur., BP  
硬脂酸stearic acid                              ≥40%(GC)
硬脂酸和棕櫚酸stearic and palmitic acid         ≥90%
鎂Mg basis (calc on dry sub.)                   4.0-5.0%
酸度或堿度acidity or alkalinity,                complies
微生物雜質(zhì)microbiological impurity,             in accordance
溶劑殘渣residual solvents,                      complies
干燥損失loss on drying, 105 °C                 ≤6.0%
酸值acid value                                  195?210(fatty acid)
氯chloride (Cl-):                               ≤1000 ppm
硫酸根sulfate (SO42-):                          ≤5000 ppm
鎘Cd:                                           ≤3 ppm
鎳Ni:                                           ≤5 ppm
鉛Pb:                                           ≤10 ppm
鑒別試驗identity                                passes test 

Storage:
密封干燥保存。
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