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320072

Sigma-Aldrich

Water

ACS reagent, suitable for EPA 601

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About This Item

Linear Formula:
H2O
CAS Number:
7732-18-5
Molecular Weight:
18.02
Beilstein/REAXYS Number:
2050024
EC Number:
231-791-2
MDL number:
MFCD00011332
UNSPSC Code:
12191602
PubChem Substance ID:
329753952
NACRES:
NA.21

product name

Water, ACS reagent

grade

ACS reagent

Quality Level

200

agency

suitable for EPA 601

vapor density

<1 (vs air)

vapor pressure

3 mmHg

form

liquid

impurities

MnO4- reducers, passes test
≤0.01% Silicate (as SiO2)
≤0.01 ppm silicate

refractive index

n20/D 1.34 (lit.)

pH

6.0-8.0 (25 °C)

conductivity

≤2 μmho per cm at 25 °C

bp

100 °C (lit.)

mp

0 °C (lit.)

density

1.000 g/mL at 3.98 °C (lit.)

anion traces

chloride (Cl-): ≤0.4 ppm
nitrate (NO3-): ≤0.4 ppm
phosphate (PO43-): ≤1.0 ppm
sulfate (SO42-): ≤1.0 ppm

cation traces

heavy metals (as Pb): ≤0.01 ppm

SMILES string

O

InChI

1S/H2O/h1H2

InChI key

XLYOFNOQVPJJNP-UHFFFAOYSA-N

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Application

Water can be used as a:
  • Solvent to ensure the appropriate deposition and recrystallization of the matrix material used in the matrix-assisted laser desorption/ionization (MALDI) analysis.
  • Mobile phase component in the high-performance liquid chromatography (HPLC) method used for the separation of polar compounds.

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

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