Citrate

MDL：
--MFCD00011669

Molecular Formula：
C6H8O7；HOC(COOH)(CH2COOH)2

Molecular Weight：
192.12

Alias：
Citric acid solution Citric acid anhydrous 2-Hydroxy-1,2,3-propanetricarboxylic acid Citric acid

Product order：

Name	Specifications	Packing	Price	Delivery
Citrate	USP	500g	RMB 528	现货
Citrate	ACS, ≥99.5% (T)	500g	RMB 94.6	现货
Citrate	分析标准品	250Mg	RMB 198
Citrate	细胞培养专用，97.0% (GC)	500g	RMB 317.9	现货
Citrate	细胞培养专用，97.0% (GC)	100g	RMB 96.8	现货
Citrate	AR, ≥99.5% (T)	1Kg	RMB 94.6
Citrate	AR, ≥99.5% (T)	500g	RMB 52.8	现货

Character：
白色颗粒，在潮湿空气中易吸潮，高温分解，易溶于水及醇；微溶于醚.
密度：1.1
熔点：153-159 °C

Quality Standard：
   
   Q/(HG)SJ 460-91
项目Item                                                  分析纯   化学纯
                                                           (AR)     (CP)
含量(C6H8O7)Assay,%                                      ≥ 99.5    99.0
澄清度试验Clarity                                           合格    合格
水不溶物Insoluble matter in water,%                      ≤ 0.01    0.01
灼烧残渣(以硫酸盐计)Ignition residue,%                   ≤ 0.035   0.07
氯化物(Cl)Chloride,%                                     ≤ 0.0025  0.005
硫酸盐(SO4)Sulfate,%　                                   ≤ 0.01    0.02
磷酸盐(PO4)Phosphate,%                                   ≤ 0.0025  0.005
钙(Ca)Calcium,%                                          ≤ 0.01    0.02
铁(Fe)Iron,%                                             ≤ 0.001   0.002
重金属(以Pb计)Heavy metals,%                             ≤ 0.0005  0.001

品级Grade                               细胞培养专用  
                                        (AR)
外观Appearance                          白色至类白色粉末
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              ≥97.0% (GC)  
水溶解试验solubility in water           50 mg/mL，Clear
水分water                               ≤1.0 % (K.F)
细胞培养测试Cell Culture Test           Pass
植物细胞培养Plant Cell Culture Test     Pass

品级Grade                               ACS级  
                                      (ACS reagent)  
含量assay                               ≥99.5% (T)
灼烧残渣Ignition residue                ≤0.02% (as SO4)
干燥损失loss on drying                  ≤0.5% , 110 °C
pKa                                     (1) 3.13, (2) 4.76, (3) 6.4
熔点mp                                  153-159 °C
氯chloride (Cl-):                       ≤5 ppm
草酸盐oxalate (C2O42-):                 ≤500 ppm
磷酸盐phosphate (PO43-):                ≤5 ppm
硫酸根sulfate (SO42-):                  ≤20 ppm
  Ca:                                   ≤10 ppm
  Cd:                                   ≤5 ppm
  Co:                                   ≤5 ppm
  Cr:                                   ≤5 ppm
  Cu:                                   ≤5 ppm
  Fe:                                   ≤3 ppm
  K:                                    ≤50 ppm
  Mg:                                   ≤5 ppm
  Mn:                                   ≤5 ppm
  Na:                                   ≤50 ppm
  Ni:                                   ≤5 ppm

USP级
ASSAY (C6H8O7 ;ANHYD.,BASIS) 99.5 - 100.5 % 
CLARITY OF SOLUTION TO PASS TEST 
COLOR OF SOLUTION TO PASS TEST 
WATER -- 1.0 % 
RESIDUE ON IGNITION -- 0.1 % 
READILY CARBONIZABLE SUBSTANCES -- TO PASS TEST 
SULFATE -- 0.015 % 
HEAVY METALS -- 0.001 %