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Merck

C1909

Sigma-Aldrich

柠檬酸 一水合物

ACS reagent, ≥99.0%

别名:

2-hydroxy-1,2,3-propanetricarboxylic acid monohydrate

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About This Item

线性分子式:
HOC(COOH)(CH2COOH)2 · H2O
CAS号:
分子量:
210.14
Beilstein:
4018641
EC 号:
MDL编号:
UNSPSC代码:
12352100
PubChem化学物质编号:
NACRES:
NA.21

等级

ACS reagent

质量水平

方案

≥99.0%

表单

powder

杂质

Substances carbonizable by hot sulfuric acid, passes test
≤0.005% Insoluble matter

灼烧残渣

≤0.02%

pKa 

(1) 3.13, (2) 4.76, (3) 6.4

溶解性

H2O: soluble 54 % (w/w) at 10 °C (Citric acid in water)
H2O: 59.2 % (w/w) at 20 °C (Citric acid in water)
H2O: 84.0 % (w/w) at 100 °C (Citric acid in water)

痕量阴离子

chloride (Cl-): ≤0.001%
oxalate (C2O42-): passes test (limit about 0.05%)
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.002%

痕量阳离子

Fe: ≤3 ppm
Pb: ≤2 ppm

官能团

carboxylic acid

SMILES字符串

OC(CC(O)(C(O)=O)CC(O)=O)=O.O

InChI

1S/C6H8O7.H2O/c7-3(8)1-6(13,5(11)12)2-4(9)10;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);1H2

InChI key

YASYEJJMZJALEJ-UHFFFAOYSA-N

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一般描述

柠檬酸一水合物是一种有机酸。据报道,其水溶液的摩尔焓为ΔsolHm (298.15K, m = 0.0203molkg-1) = (29061±123)Jmol-1它可以通过在柠檬酸合成期间在20-25°C下从柠檬酸溶液母液中结晶而制得。对其晶体生长动力学的研究表明,生长与尺寸呈线性相关。

一水柠檬酸是一种有机弱酸,在食品和饮料产品中用作天然防腐剂。

应用

使用柠檬酸一水合物制备的柠檬酸溶液可用于丙酮法 68Ga预纯化和放射性标记技术。
柠檬酸一水合物可用作
  • 释放改良剂,用于改善熔体挤出Eudragit RS PO片剂中盐酸地尔硫卓的释放。
  • 配制柠檬酸盐缓冲液,以便制备用于活体显微镜分析的血小板。
  • 制备Tris-柠檬酸盐缓冲液,以用于细菌酶电泳。

象形图

Exclamation mark

警示用语:

Warning

危险声明

危险分类

Eye Irrit. 2 - STOT SE 3

靶器官

Respiratory system

储存分类代码

11 - Combustible Solids

WGK

WGK 1

闪点(°F)

345.0 °F - closed cup

闪点(°C)

173.9 °C - closed cup

个人防护装备

dust mask type N95 (US), Eyeshields, Gloves


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