半岛bd体育手机客户端 说明
应用
DL-Malic acid is an organic acid used for studying the impact on ultrasound pasteurization. It has also been used to culturePichia membraneafaciens.
生化/生理作用
Malic acid is a dicarboxylic acid and an important regulatory metabolite. It has been implicated in process of fruit ripening. Malic acid is important for the starch metabolism; low malic acid content results in transient accumulation of starch. Mitochondrial-malate metabolism modulates ADP-glucose pyrophosphorylase activity and redox status of plastids.
基本信息
| 线性分子式 | HO2CCH2CH(OH)CO2H |
| 分子量 | 134.09 |
| Beilstein | 1723539 |
| EC 号 | 230-022-8 |
| MDL编号 | MFCD00064212 |
| PubChem化学物质编号 | 57648231 |
| NACRES | NA.25 |
半岛bd体育手机客户端 性质
| 质量水平 | 200 |
| 蒸汽密度 | 4.6 (vs air) |
| 蒸汽压 | <0.1 mmHg ( 20 ℃) |
| 测定 | 99-100.5% (alkalimetric) |
| 旋光性 | [α]/D ?0.10 to +0.10° |
| 自燃温度 | 644 °F |
| 质量 | meets analytical specification of FCC, E296 |
| technique(s) | IR spectroscopy: suitable |
| 杂质 | ≤0.05% maleic acid ≤0.1% water insoluble matter ≤1% fumaric acid |
| 灼烧残渣 | ≤0.1% (as SO4) |
| mp | 129-133 ℃ 131-133 ℃ (lit.) |
| 溶解性 | acetone: soluble 17.75 g/ 100 gm at 20 ℃ diethyl ether: soluble 0.84 g/100 gm at 20 ℃ dioxane: soluble 22.70 g/100 gm at 20 ℃ ethanol: soluble 45.53 g/100 gm at 20 ℃ methanol: soluble 82.70 g/100 g at 20 ℃ water: soluble 55.8 g/100 gm at 20 ℃ benzene: insoluble |
| 痕量阳离子 | As: ≤3 mg/kg Hg: ≤1 mg/kg Pb: ≤2 mg/kg |
| 适用性 | complies for identity (IR) |
| application(s) | pharmaceutical (small molecule) |
| SMILES string | OC(CC(O)=O)C(O)=O |
| InChI | 1S/C4H6O5/c5-2(4(8)9)1-3(6)7/h2,5H,1H2,(H,6,7)(H,8,9) |
| InChI key | BJEPYKJPYRNKOW-UHFFFAOYSA-N |
安全信息
| 象形图 |  |
| 警示用语： | Warning |
| 危险声明 | H319 |
| 预防措施声明 | P264 - P280 - P305 + P351 + P338 - P337 + P313 |
| 危险分类 | Eye Irrit. 2 |
| 储存分类代码 | 11 - Combustible Solids |
| WGK | WGK 3 |
| 闪点(F) | 397.4 °F |
| 闪点(C) | 203 ℃ |
| 个人防护装备 | dust mask type N95 (US), Eyeshields, Gloves |
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