L-酒石酸 L-（+）-Tartaric acid

L-酒石酸的化學性質(zhì),質(zhì)量標準及用途

無色半透明晶體或白色細至粗結(jié)晶粉末，有酸味。
熔點  170-172 °C(lit.) 
比旋光度  12 º (c=20, H2O) 
密度  1.76 
蒸氣密度 5.18 (vs air)
 

外觀Appearance                                         白色結(jié)晶粉末或無色結(jié)晶
紅外光譜鑒別Infrared spectrometry       和對照品匹配 
熔點Melting point                                       168°C - 172°C 
純度Purity                                                  >99% (中和滴定) 
水溶性實驗Solubility in Water                溶液透明
干燥損失Loss on drying                        <0.5 % (1 g, 105°C) 
重金屬Heavy metals (as Pb)               <10 ppm 
硫酸鹽灰分Sulfated ash                        <0.1 % 
比旋光度Specific rotation [a]20/D       +12° - +13° (c=20, H2O) 
痕量分析Trace analysis: 
Cl                                     < 100 ppm 
SO4                                    < 150 ppm 
Ca                                     < 200 ppm 
比旋光度Specific rotation [a]20/D       +12.0 - +13.0 deg(C=20, H2O)(干燥后) 


項目                                    ACS級     
                                        (ACS) 
外觀Appearance                          白色結(jié)晶
紅外光譜鑒別Infrared spectrometry       和對照品匹配  
純度Purity                              >99.0%
重金屬Heavy metals (as Pb)              <5 ppm 
灼燒殘渣Res. after ignition             <0.02 % 
痕量分析Trace analysis : 
   Cl                                   < 10 ppm 
   PO4                                  < 10 ppm 
   Fe                                   < 5 ppm 
不溶性物質(zhì)Insoluble matter              <0.005 % 
草酸鹽試驗Oxalate(C2O4) (限值 0.1%)     合格
硫酸根Sulfur compounds (as SO4)         <0.002 % 

品級Grade                               FCC 
                                        FG
外觀Appearance                          白色結(jié)晶粉末
熔點Melt Point                          ≤173.0 °C
純度Purity                              99.7 - 100.5 % （中和滴定） 
紅外光譜鑒別Infrared spectrometry       符合 
比旋光度Specific rotation [a]20/D       12.0 - 13.0 °(C=20%,H2O) 
干燥損失Loss on Drying                  ≤0.5 % 
灼燒殘渣Residue on ignition (Ash)       ≤0.05 % 
Oxylate test                            Pass 
Sulfate Test                            Pass 
痕量分析Trace Metal analysis (as lead) ≤2 ppm 
濁度試驗Solubility (Turbidity) C=5%H2O 透明 
砷Arsenic (As)                         ≤3 ppm 
鎘Cadmium (Cd)                         ≤1 ppm 
汞Mercury (Hg)                         ≤1 ppm 
鉛Lead (Pb)                            ≤10 ppm 


品級Grade                              藥用級
                                   (Ph. Eur., BP, USP)
外觀Appearance                         白色粉末
紅外光譜鑒別Infrared spectrometry      和對照匹配
純度Purity (以干基計）                 99.7-100.5%
比旋光度Specific rotation [a]20/D      +12.0 to +12.8°, c = 20% in H2O
有機揮發(fā)性雜質(zhì)organic volatile impurities, complies (GC) 
殘留溶劑residual solvents,             complies 
重金屬heavy metals (as Pb)             ≤0.001% 
灼燒殘渣ign. residue                   ≤0.05% (as SO4) 
干燥損失loss on drying, 105 °C        ≤0.2% 
氯chloride (Cl-):                      ≤100 ppm 
草酸鹽oxalate (C2O42-):                in accordance 
草酸oxalate (as oxalic acid):          ≤100 ppm 
硫酸鹽sulfate (SO42-):                 ≤100 ppm 
砷As:                                  ≤2  ppm 
鈣Ca:                                  ≤200  ppm 
銅Cu:                                  ≤10  ppm 
汞Hg:                                  ≤1  ppm 
鉛Pb:                                  ≤2  ppm 
鋅Zn:                                  ≤10  ppm 
水溶解試驗solubility in water          合格

L(+)-酒石酸廣泛用作飲料和其他食品的酸味劑，用于葡萄酒、軟飲料、糖果、面包、某些膠狀甜食。利用其光學活性，作為化學拆分劑，用于制造抗結(jié)核病藥物中間體DL-氨基丁醇的拆分；還可以作為手性原料用于酒石酸衍生物的合成；利用其酸性，作為滌綸織物樹脂整理的催化劑，谷維素生產(chǎn)的PH調(diào)節(jié)劑；利用其絡(luò)合性，用作電鍍、脫硫、酸洗以及化學分析、醫(yī)藥檢驗中的絡(luò)合劑、掩蔽劑、螯合劑、印染的防染劑；利用其還原性，用作化學制鏡的還原劑。照相的顯影劑。還能與多種金屬離子絡(luò)合，可作金屬表面的清洗劑和拋光劑。
 

危險品標志  Xi 
危險類別碼  36/37/38 
安全說明  26-36-37/39 
海關(guān)編碼  29181200 
WGK Germany  3 
RTECS號 WW7875000