草酸規格:99.5% 產地:英國/美國 包裝:50kg/袋 價格:4800元/噸
草酸
Oxalic acid dihydrate
Cas號: 6153-56-6
分子式 C2H2O4•2H2O；HO2CCO2H•2H2O
分子量 126.07
別名 乙二酸,蓚酸
Ethanedioic acid
性狀 無色單斜片狀或棱柱體結晶或白色粉末。在溫熱、干燥空氣中風化，可溶于水及乙醇。無氣味。150-160℃升華。在高熱干燥空氣中能風化。1g溶于7ml水、2ml沸水、2.5ml乙醇、1.8ml沸乙醇、100ml 醚、5.5ml 油，不溶于苯、氯仿和石油醚。0.1mol/L溶液的pH值為1.3。
密度：1.653
熔點：101-102℃
沸點：86.9℃
折光率n20/D：1.45560
備注: 以上描述，僅作參考，并不表示您收到的產品，與此項描述完全相符，產品的出廠標準，請參見質量標準。
質量標準
GB/T 9855-88
項目Item 優級純 分析純 化學純
(GR) (AR) (CP)
含量(C2H2O4•
2H2O)Assay,% ≥99.8 99.5 99.5
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（以禁發 硫酸鹽計）Ignition residue,% ≤0.01 0.02 0.05
氯化鈉(Cl)Chloride,% ≤0.0005 0.002 0.005
禁發 硫酸鹽(SO4)Sulfate,% ≤0.001 0.002 0.005
總氮量(N)Total nitrogen,% ≤0.001 0.002 0.005
鈣(Ca)Calcium,% ≤0.001 0.003 0.005
鐵(Fe)Iron,% ≤0.0002 0.0005 0.002
重金屬(以Pb計)Heavy metals,% ≤0.0002 0.0004 0.001
易碳化物質Readily carboniz-able substance 合格 合格 合格
ACS級
項目名稱Item ACS Grade
含量(H2C2O4•2H2O)Assay 99.5-102.5%
易炭化物質Substances darkened by hot sulfuric acid Passes test
水不溶物Insoluble matter ≤0.005%
灼燒殘渣Residue after ignition ≤0.01%
氯化物(Cl)Chloride(Cl) ≤0.002%
禁發 硫酸鹽(SO4)Sulfate ≤0.005%
鈣(Ca)Calcium(Ca) ≤0.001%
氮化合物(以N計)Nitrogen compounds(as N) ≤0.001%
重金屬(以Pb計)Heavy metals(as Pb) ≤5ppm
鐵(Fe)Iron(Fe) ≤2ppm
99.998% metals basis:
外觀Appearance White Powder
X-射線衍射分析X-Ray Diffraction Conforms to Structure
紅外光譜鑒別Infrared spectrometry Conforms to Structure
純度Purity ≥99.998% Based on Trace Metals Impurities of ICP
痕量金屬分析total metallic impurities ≤20ppm by ICP Atomic emission
99.99% metals basis:
外觀Appearance White Powder
X-射線衍射分析X-Ray Diffraction Conforms to Structure
紅外光譜鑒別Infrared spectrometry Conforms to Structure
純度Purity ≥99.99% Based on Trace Metals Impurities of ICP
痕量金屬分析total metallic impurities ≤100ppm by ICP Atomic emission
≥99.9999% (metals basis)：
外觀Appearance 白色粉末或結晶
純度Purity ≥99.9999% Based On Trace Metals Analysis
總氮total nitrogen ≤10 ppm
熔點mp 104-106 °C
anion traces by
氯chloride (Cl-): ≤5000 ppb
磷酸根phosphate (PO43-): ≤500 ppb
禁發 硫酸根sulfate (SO42-): ≤2000 ppb
cation traces
Ag: ≤0.01 ppm
Al: ≤0.02 ppm
As: ≤0.01 ppm
Au: ≤0.001 ppm
Ba: ≤0.1 ppm
Be: ≤0.001 ppm
Bi: ≤0.001 ppm
Ca: ≤0.1 ppm
Cd: ≤0.05 ppm
Ce: ≤0.005 ppm
Co: ≤0.005 ppm
Cr: ≤0.01 ppm
Cs: ≤0.01 ppm
Cu: ≤0.005 ppm
Dy: ≤0.005 ppm
Er: ≤0.005 ppm
Eu: ≤0.005 ppm
Fe: ≤0.5 ppm
Ga: ≤0.001 ppm
Gd: ≤0.005 ppm
Ge: ≤0.005 ppm
Hf: ≤0.005 ppm
Hg: ≤0.005 ppm
Ho: ≤0.005 ppm
In: ≤0.001 ppm
Ir: ≤0.005 ppm
K: ≤0.2 ppm
La: ≤0.005 ppm
Li: ≤0.005 ppm
Lu: ≤0.005 ppm
Mg: ≤0.02 ppm
Mn: ≤0.005 ppm
Mo: ≤0.005 ppm
Na: ≤0.1 ppm
Nb: ≤0.005 ppm
Nd: ≤0.005 ppm
Ni: ≤0.01 ppm
Os: ≤0.01 ppm
Pb: ≤0.01 ppm
Pd: ≤0.01 ppm
Pr: ≤0.005 ppm
Pt: ≤0.05 ppm
Rb: ≤0.01 ppm
Re: ≤0.005 ppm
Rh: ≤0.005 ppm
Ru: ≤0.005 ppm
Sb: ≤0.001 ppm
Sc: ≤0.05 ppm
Se: ≤0.01 ppm
Sm: ≤0.005 ppm
Sn: ≤0.005 ppm
Sr: ≤0.1 ppm
Ta: ≤0.01 ppm
Tb: ≤0.005 ppm
Te: ≤0.005 ppm
Th: ≤0.005 ppm
Ti: ≤0.02 ppm
Tl: ≤0.001 ppm
Tm: ≤0.005 ppm
U: ≤0.001 ppm
V: ≤0.01 ppm
W: ≤0.005 ppm
Y: ≤0.005 ppm
Yb: ≤0.005 ppm
Zn: ≤0.02 ppm
Zr: ≤0.1 ppm
貯存 密封保存
用途 絡合劑。沉淀劑。還原劑。掩蔽絡合物的形成劑，校準錳酸鉀及禁發 硫酸鈰溶液的標準溶液，顯微微晶分析檢驗鈉和其他元素。分析中用以檢定和測定鈹、鈣、鉻、金、錳、鍶、釷等金屬離子。沉淀鈣、鎂、釷和稀土元素。漂白劑。助染劑。
聯合國編號 3261
Risk： R21/22-
Safety : S24/25-
Hazard : Xn -