Cas號 |
【5949-29-1】 |
MDL:
|
--MFCD00149972 |
Beilstein |
4018641 |
EINECS:
|
--201-069-1 |
分子式 |
C6H8O7·H2O; HOC(COOH)(CH2COOH)2·H2O |
分子量 |
192.12 |
別名 |
枸櫞酸,2-羥基丙羧酸 |
|
性狀 無色透明斜方形結晶或白色顆粒,無氣味,味酸,在乾燥空氣中或加熱至40-50℃成無水物,在潮濕空氣中微有潮解性,75℃時變軟,100℃時熔融,易溶于水,能溶于醇
密度:1.54
熔點: 135-152℃
閃點: 173.9℃
備註: 以上描述,僅作參考,並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(C6H8O7·H2O)Assay,% ≥ 99.8 99.5 99.0
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,% ≤ 0.01 0.02 0.07
氯化物(Cl)Chloride,% ≤ 0.0005 0.0005 0.005
硫酸鹽(SO4)Sulfate,% ≤ 0.002 0.005 0.02
磷酸鹽(PO4)Phosphate,% ≤ 0.001 0.001 0.005
草酸鹽(C2O4)Oxalate ≤ 0.05 0.05 --
鈣(Ca)Calcium,% ≤ 0.002 0.005 0.02
鐵(Fe)Iron,% ≤ 0.0003 0.0005 0.001
銅(Cu)Copper,% ≤ 0.0005 0.0005 --
鉛(Pb)Lead,% ≤ 0.0005 0.0005 0.001
易碳化物質Readily earbonizable substances 合格 合格 --
項目 ACS級
(ACS)
含量Assay (C6H8O7•H2O) 99.0-102.0%
不溶物Insoluble Matter ≤ 0.005%
灼燒殘渣Residue after Ignition ≤ 0.02%
氯Chloride (Cl) ≤ 0.001%
草酸鹽試驗Oxalate (C2O4) To pass test (limit about 0.05%)
磷酸鹽Phosphate (PO4) ≤0.001%
硫酸鹽Sulfur Compounds (as SO4) ≤0.002%
鐵Iron (Fe) ≤3 ppm
鉛Lead (Pb) ≤2 ppm
易碳化物質Substances Carbonizable by Hot Sulfuric Acid (Tartrates, etc.)
To pass test
品級Grade 藥典級
(Ph. Eur., BP, USP, E330)
含量assay 99.5-100.5% (based on anhydrous substance)
紅外光譜鑑別Infrared spectrometry Conforms
residual solvents, complies
heavy metals (as Pb) ≤0.0005%
water 7.5-8.8% (Karl Fischer)
ign. residue ≤0.05% (as SO4)
pKa (1) 3.13, (2) 4.76, (3) 6.4
痕量陰離子anion traces by ICP Atomic emission and AAS
chloride (Cl-): ≤50 ppm
oxalate (as oxalic acid): ≤100 ppm
sulfate (SO42-): ≤100 ppm
痕量陽離子cation traces by ICP Atomic emission
Al: ≤0.2 ppm
As: ≤1 ppm
Ca: ≤200 ppm
Cu: ≤10 ppm
Fe: ≤10 ppm
Hg: ≤1 ppm
Pb: ≤1 ppm
Zn: ≤10 ppm
suitability complies for appearance of solution
complies for reaction against H2SO4
99.9998% (metals basis) :
含量assay ≥99.5% (T)
純度Purity ≥99.9998% (metals basis)
total impurities
total nitrogen (N) ≤5 ppm
acetate ≤5000 ppb
formia te ≤5000 ppb
glycolate ≤5000 ppb
pKa (1) 3.13, (2) 4.76, (3) 6.4
anion traces
bromide (Br-): ≤2000 ppb
chloride (Cl-): ≤10000 ppb
fluoride (F-): ≥2000 ppb
iodide (I-): ≤2000 ppb
nitrate (NO3-): ≤10000 ppb
nitrite (NO2-): ≤2000 ppb
oxalate (C2O42-): ≤5000 ppb
phosphate (PO43-): ≤2000 ppb
sulfate (SO42-): ≤10000 ppb
tartrate (C4H4O62-): ≤0.2%
cation traces
Ag: ≤0.01 ppm
Al: ≤0.05 ppm
As: ≤0.01 ppm
Au: ≤0.01 ppm
Ba: ≤0.05 ppm
Be: ≤0.01 ppm
Bi: ≤0.01 ppm
Ca: ≤0.1 ppm
Cd: ≤0.01 ppm
Ce: ≤0.01 ppm
Co: ≤0.01 ppm
Cr: ≤0.05 ppm
Cs: ≤0.01 ppm
Cu: ≤0.01 ppm
Dy: ≤0.01 ppm
Er: ≤0.01 ppm
Eu: ≤0.01 ppm
Fe: ≤0.1 ppm
Ga: ≤0.01 ppm
Gd: ≤0.01 ppm
Ge: ≤0.01 ppm
Hf: ≤0.01 ppm
Hg: ≤0.005 ppm
Ho: ≤0.01 ppm
In: ≤0.01 ppm
Ir: ≤0.01 ppm
K: ≤0.1 ppm
La: ≤0.01 ppm
Li: ≤0.01 ppm
Lu: ≤0.01 ppm
Mg: ≤0.05 ppm
Mn: ≤0.01 ppm
Mo: ≤0.01 ppm
Na: ≤2 ppm
Nb: ≤0.01 ppm
Nd: ≤0.01 ppm
Ni: ≤0.01 ppm
Os: ≤0.01 ppm
Pb: ≤0.01 ppm
Pd: ≤0.01 ppm
Pr: ≤0.01 ppm
Pt: ≤0.01 ppm
Rb: ≤0.01 ppm
Re: ≤0.01 ppm
Rh: ≤0.01 ppm
Ru: ≤0.01 ppm
Sb: ≤0.01 ppm
Sc: ≤0.05 ppm
Se: ≤0.05 ppm
Sm: ≤0.01 ppm
Sn: ≤0.01 ppm
Sr: ≤0.01 ppm
Ta: ≤0.01 ppm
Tb: ≤0.01 ppm
Te: ≤0.01 ppm
Th: ≤0.01 ppm
Ti: ≤0.05 ppm
Tl: ≤0.01 ppm
Tm: ≤0.01 ppm
U: ≤0.01 ppm
V: ≤0.01 ppm
W: ≤0.01 ppm
Y: ≤0.01 ppm
Yb: ≤0.01 ppm
Zn: ≤0.01 ppm
Zr: ≤0.01 ppm
貯存 密封保存。
用途 檢定鉍、亞硝酸鹽、氧和水,測定鋁、銅、汞、鎳、氧和釷、用作多價螯合劑,除去微量金屬,配製緩衝溶液,測定血鉀。