所有图片(1)

695017

Sigma-Aldrich

磷酸

ACS reagent, ≥85 wt. % in H2O

别名:
正磷酸
线性分子式:
H3PO4
CAS号:
分子量:
98.00
Beilstein:
1921286
EC 号:
MDL编号:
PubChem化学物质编号:
NACRES:
NA.21

质量水平

200

等级

ACS reagent

蒸汽密度

3.4 (vs air)

蒸汽压

2.2 mmHg ( 20 °C)
5 mmHg ( 25 °C)

测定

≥85% H3PO4 basis (by NaOH, titration)

形式

liquid

浓度

≥85 wt. % in H2O

technique(s)

NMR: suitable

杂质

reducing substances, passes test
≤0.001% volatile acids (as CH3COOH)

颜色

APHA: ≤10

bp

158 °C (lit.)

mp

~40 °C (lit.)

密度

1.685 g/mL at 25 °C (lit.)

痕量阴离子

chloride (Cl-): ≤3 ppm
nitrate (NO3-): ≤5 ppm
sulfate (SO42-): ≤0.003%

痕量阳离子

As: ≤1 ppm
Ca: ≤0.002%
Fe: ≤0.003%
K: ≤0.005%
Mg: ≤0.02%
Mn: ≤0.5 ppm
Na: ≤0.025%
Sb: ≤0.002%
heavy metals: ≤0.001% (by ICP)

SMILES string

OP(O)(O)=O

InChI

1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)

InChI key

NBIIXXVUZAFLBC-UHFFFAOYSA-N

Gene Information

human ... SRC(6714)

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相关类别

一般描述

磷酸 (H 3 PO 4 ) 在工业上用于处理金属表面以获得更好的涂料和树脂涂层的附着力。

应用

磷酸可用作测定普通磷脂的磷-31核磁共振(31磷核磁共振)化学位移的标准。它可用于以下研究:
  • 作为31P核磁共振波谱分析人脑白质脂质组成的外部标准。
  • 31P NMR波谱作为组蛋白H4酸不稳定磷酸化的外部标准。
  • 作为参考标准,通过反应前和反应后质谱31核磁共振和傅里叶变换红外光谱法研究二氧化硅/氧化铝负载的磷酸钠上存在的表面物质。
  • 作为催化剂在一系列表面改性和未改性的ZSM-5上(623K)苯乙酸酯的气相弗里斯重排。

包装

2.5 L in poly bottle
100, 12×100, 500 mL in poly bottle

其他说明

浓磷酸大约为 85% H3PO4(水溶液)。

象形图

CorrosionExclamation mark

警示用语:

Danger

危险声明

危险分类

Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B

储存分类代码

8B - Non-combustible, corrosive hazardous materials

WGK

WGK 1

闪点(F)

Not applicable

闪点(C)

Not applicable

分析证书

原产地证书 (CofO)

A simple method of increasing the adhesion of acrylic filling materials to enamel surfaces.
Buonocore MG.
Journal of Dental Research, 34(6), 849-853 (1955)
Internal versus external surface active sites in ZSM-5 zeolite: Part 1. Fries rearrangement catalyzed by modified and unmodified H3PO4/ZSM-5.
Ghiaci M, et al.
Applied Catalysis A: General, 298, 32-39 (2006)
FTIR and 31 P-NMR spectroscopic analyses of surface species in phosphate-catalyzed lactic acid conversion.
Gunter GC, et al.
J. Catal., 164(1), 207-219 (1996)
J M Fujitaki et al.
Biochemistry, 20(12), 3658-3664 (1981-06-09)
Phosphorus-31 nuclear magnetic resonance (31P NMR) is used to investigate acid-labile phosphorylation of histone H4. 31P NMR detects phosphorylated histidine residues in in vitro enzymatically phosphorylated H4. The source of kinase is nuclei from either regenerating rat liver or Walker-256
D S Marinier et al.
Journal of lipid research, 29(9), 1237-1243 (1988-09-01)
In order to study the lipid composition of human white matter, we have developed a 31P NMR spectroscopy method, which allows the determination and quantitation of the main phospholipids found in biological membranes. The technique is based upon the use

实验方案

Enzymatic Assay of Endoproteinase Glu-C (EC 3.4.21.19)

This procedure may be used for determination of Endoproteinase Glu-C enzymatic activity using N-t-Boc-L-glutamic acid α-phenyl ester as the substrate.

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