DL-Malic acid

MDL：
MFCD00064212

Molecular Formula：
C4H6O5；HO2CCH2CH(OH)CO2H

Molecular Weight：
134.09

Alias：
(±)一羟基丁二酸,DL-羟基丁二酸,羟基丁二酸,DL-羟基琥珀酸 (±)-2-Hydroxysuccinic acid DL-Hydroxybutanedioic acid DL-Hydroxy succinic acid (+/-)-butanedioic acid 1-Hydroxy-1,2-ethanedicarboxylic acid

Product order：

Name	Specifications	Packing	Price	Delivery
DL-Malic acid	99.9%	100g	RMB 198	现货
DL-Malic acid	CP	100g	RMB 88	Consulting service
DL-Malic acid	AR	100g	RMB 52.8	Consulting service
DL-Malic acid	AR	500g	RMB 93.5	Consulting service

Character：
苹果酸在正常情况下稳定，湿度高时有吸湿性。易溶于甲醇、乙醇、丙酮和其他许多极性溶剂。酸性较强，其0.001%水溶液pH值为3.80，0.01%者pH值为2.80，1%者pH值为2.35。离解常数k1为 4×10-4，k2为9×10-6。三斜晶系白色晶体。摩尔溶解热-20.516kJ/mol，粘度（SO2水溶液，25℃）6.5mPa·s。
密度：1.601
熔点：129-133 °C

Quality Standard：
Q/(HG)SJ 412-92
项目Item                                             化学纯     分析纯
                                                       (CP)      (AR)
含量(C4H6O5)Assay,%                                  ≥ 99.0     99.5
熔点范围Melting range,℃                              128-130  126-130(2)
溶解试验Solubility                                      合格     合格
灼烧残渣(以硫酸盐计)Ignition residue,%               ≤ 0.1      0.05
氯化物(Cl)Chloride,%                                 ≤ 0.01     0.01
硫酸盐(SO4)Sulfate,%　                               ≤ 0.02     0.01
铁(Fe)Iron,%                                         ≤ 0.005    0.005
砷(As),Arsenic,%                                     ≤ 0.0001   0.00005
重金属(以Pb计)Heavy metals,%                         ≤ 0.002    0.001

Storage：
避光、密闭、干燥阴凉处贮存。