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1.00546 Supelco

meta-Phosphoric acid

pieces for analysis (stabilized with sodium metaphosphate) EMSURE®

Synonym: Metaphosphoric acid, m-Phosphoric acid



Quality Level   300
vapor pressure   <0.001 hPa ( 20 °C)
pH   2 (20 °C, 33 g/L in H2O)
bp   600 °C/1013 hPa
mp   200-250 °C
density   2.0 g/cm3 at 20 °C
bulk density   1000 kg/m3
storage conditions   Store below +30°C.


Analysis Note

Assay (acidimetric, HPO₃): 40 - 50 %
Assay (acidimetric, NaPO₃): 50 - 60 %
Identity: passes test
Chloride (Cl): ≤ 10 ppm
Nitrate (NO₃): ≤ 5 ppm
Reducing matter (as H₃PO₃): ≤ 100 ppm
As (Arsenic): ≤ 1 ppm
Cd (Cadmium): ≤ 10 ppm
Co (Cobalt): ≤ 5 ppm
Cu (Copper): ≤ 10 ppm
Fe (Iron): ≤ 50 ppm
Mn (Manganese): ≤ 5 ppm
Ni (Nickel): ≤ 10 ppm
Pb (Lead): ≤ 10 ppm
Zn (Zinc): ≤ 10 ppm

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety & Documentation

Safety Information

Protocols & Articles



Application-Oriented Quality and Optimized Packaging EMSURE® acids for analysis are produced and tested according to the highest standards for purity and safety. Extensive specifications with a high ...

Analytical Method: Ascorbic acid in fruit juices

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Application Notes: Reflectometry – Ascorbic Acid in Flour

Reagents: Cat. No. 116981 Reflectoquant® Ascorbic Acid Test Cat. No. 117246 Reflectometer RQflex® 20 Cat. No. 100546 meta-Phosphoric Acid
Keywords: Sample preparations, Titrations

EMSURE® Premium grade products

The EMSURE® quality grade designates our premium classical Inorganics and Solvents, which are optimized for regulated analyses and highly demanding lab applications. These products offer the highest ...
Keywords: Solvents

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