乙酸銨
Ammonium acetate
Cas號 【631-61-8】 MDL: --MFCD00013066
Beilstein EINECS: --211-162-9
分子式 C2H7NO2； CH3COONH4
分子量 77.08
別名 醋酸銨
Acetic acid ammonium salt
分子結(jié)構(gòu)式
性狀 無色或白色結(jié)晶，極易潮解，易溶于水和醇。
備注: 以上描述，僅作參考，并不表示您收到的產(chǎn)品，與此項描述完全相符，產(chǎn)品的出廠標準，請參見質(zhì)量標準。
質(zhì)量標準
GB/T 1292-86
項目Item 優(yōu)級純 分析純 化學(xué)純
(GR) (AR) (CP)
含量(CH3COONH4)Assay,% ≥99.0 98.0 97.0
水溶液反應(yīng)Solution reaction 合格 合格 合格
澄清度試驗Clarity 合格 合格 合格
水不溶物Insoluble matter in water,% ≤0.002 0.005 0.01
灼燒殘渣（以硫酸鹽計）Ignition residue,% ≤0.005 0.005 0.01
水分(H2O)Water,% ≤2.0 -- --
氯化物(Cl)Chloride,% ≤0.0005 0.0005 0.001
硫酸鹽(SO4)Sulfate,% ≤0.001 0.002 0.005
硝酸鹽(NO3)Nitrate,% ≤0.001 0.001 --
磷酸鹽(PO4)Phosphate,% ≤0.0003 0.0005 --
鎂(Mg)Magnesium,% ≤0.0002 0.0004 0.001
鈣(Ca)Calcium,% ≤0.0005 0.001 0.002
鐵(Fe)Iron,% ≤0.0002 0.0005 0.001
重金屬(以Pb計)Heavy metals,% ≤0.0002 0.0005 0.001
還原高錳酸鉀物質(zhì)Potassium
permanganate-reducing substances ≤0.005 0.01 0.01
項目名稱Item ACS Grade
含量(CH3COONH4)Assay ≥97.0%
pH(5%溶液，25.0℃)pH 6.7-7.3
水不溶物Insoluble matter ≤0.005%
蒸發(fā)殘渣Residue after evaporation ≤0.01%
氯化物(Cl)Chloride(Cl) ≤5ppm
硝酸鹽(NO3)Nitrate ≤0.001%
硫酸鹽(SO4)Sulfate ≤0.001%
重金屬(以Pb計)Heavy metals(as Pb) ≤5ppm
鐵(Fe)Iron(Fe) ≤5ppm
品級Grade 色譜純
(grade for HPLC)
含量assay ≥99.0% (NT)
pH 6.5-7.5 (20 °C, 10% in H2O)
λ 10 % in H2O
UV absorption
λ: 250 nm ≤ 0.05
λ: 260 nm ≤ 0.04
λ: 270 nm ≤ 0.03
λ: 280 nm ≤0.02
λ: 500 nm ≤0.02
RP gradient test pass
品級Grade 分子生物學(xué)級, ~98%
(for molecular biology, ~98% )
外觀Appearance 白色至類白色粉末
氯Chloride ≤ 5 ppm
鐵Iron (Fe) ≤5 ppm
重金屬Heavy Metals(As Lead) ≤5 ppm
DNAse, None Detected
核酸外切酶Exonuclease Detection None Detected
RNAse Detection None Detected
蛋白酶Protease by FITC-Casein None Detected
純度Purity ≥98.0% (滴定)
99.99% metals basis:
外觀Appearance White Moist Crystals
紅外光譜Infrared spectrometry Conforms to Structure
純度Purity ≥99.99% Based on Trace Metals Impurities
總痕量金屬雜質(zhì)total metallic impurities ≤100ppm by ICP Atomic emission
滴定純度Purity (Titration by NAOH) ≥98.0 %
灼燒殘渣Residue on ignition (Ash) 0.01 %
不溶物Insoluble matter (C=10%; H2O) ≤0.005 %
C=10%, H2O
氯Chloride (CL) ≤5 ppm
鐵Iron (Fe) ≤5 ppm
重金屬Heavy Metal (as Pb) ≤5 ppm
硝酸根Nitrate (NO3) ≤0.001 %
pH (@ 25 °C, C=5%; H2O) 6.7- 7.3
硫酸根Sulfate ≤0.001 %
99.996% metals basis:
外觀Appearance White Crystals
紅外光譜Infrared spectrometry Conforms to Structure
滴定純度Purity (Titration by NAOH) ≥98.0 %
純度Purity ≥99.996% Based on Trace Metals Impurities
總痕量金屬雜質(zhì)total metallic impurities ≤40ppm by ICP Atomic emission
品級Grade 用于質(zhì)譜，LC-MS淋洗液添加劑
(for mass spectroscopy ，eluent additive for LC-MS，≥99.0%)
外觀Appearance White Crystals
紅外光譜Infrared spectrometry Conforms to Structure
純度Purity ≥99.0% (calc. on dry substance, T)
不溶物insoluble matter, passes filter test
水分water ≤1%
灼燒殘渣ign. residue ≤0.01% (as SO4)
pH 6.2-7.5 (25 °C, 1 M in H2O)
水溶性solubility H2O: soluble1 M at 20 °C, clear, colorless
氯chloride (Cl-): ≤5 ppm
硝酸根nitrate (NO3-): ≤10 ppm
硫酸根sulfate (SO42-): ≤10 ppm
cation traces Al: ≤1 ppm
As: ≤0.1 ppm
Ba: ≤1 ppm
Bi: ≤1 ppm
Ca: ≤5 ppm
Cd: ≤1 ppm
Co: ≤1 ppm
Cr: ≤1 ppm
Cu: ≤1 ppm
Fe: ≤1 ppm
K: ≤5 ppm
Li: ≤1 ppm
Mg: ≤1 ppm
Mn: ≤1 ppm
Mo: ≤1 ppm
Na: ≤5 ppm
Ni: ≤1 ppm
Pb: ≤1 ppm
Sr: ≤1 ppm
Zn: ≤1 ppm
λ 1 M in H2O
UV absorption λ: 260 nm Amax: ≤0.015
λ: 280 nm Amax: ≤0.010
suitability in accordance for LC-MS
貯存 密封干燥陰涼處保存
用途 緩沖液配制，測定鉛及鐵，從其它硫酸鹽分離硫酸鉛
聯(lián)合國編號 3077
Risk：
Safety : S24/25 -
Hazard :
