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Sigma-Aldrich

meta-Phosphoric acid

puriss. p.a., ACS reagent, ≥33.5% (T)

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Synonym(s):
Metaphosphoric acid
Linear Formula:
(HPO3)n
CAS Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent
puriss. p.a.

Quality Level

form

crystalline

contains

57-63% NaPO3 as stabilizer

concentration

≥33.5% (T)

technique(s)

HPLC: suitable

solubility

water: miscible

density

2 g/cm3

anion traces

chloride (Cl-): ≤10 mg/kg
nitrate (NO3-): ≤5 mg/kg
sulfate (SO42-): ≤20 mg/kg

cation traces

As: ≤1 mg/kg
Ca: ≤20 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤10 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

OP(=O)=O

InChI

1S/HO3P/c1-4(2)3/h(H,1,2,3)

InChI key

UEZVMMHDMIWARA-UHFFFAOYSA-N

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General description

meta-Phosphoric acid is a monobasic acid.

Application

meta-Phosphoric acid may be employed as an extraction reagent during isocratic reversed-phase ion-pairing high performance liquid chromatographic analysis of ascorbic acid and dehydroascorbic acid in plant.

Pictograms

Corrosion

Signal Word

Danger

Hazard Statements

Hazard Classifications

Eye Dam. 1 - Skin Corr. 1B

Storage Class Code

8A - Combustible, corrosive hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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M A Kall et al.
Journal of chromatography. B, Biomedical sciences and applications, 730(1), 101-111 (1999-08-07)
The total vitamin C amount in different food and plasma samples was determined by a dual detection system, after HPLC separation, with direct detection of ascorbic acid and indirect fluorimetric detection of dehydroascorbic acid after a post-column O-phenyldiamine derivatisation. The

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