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332089

Sigma-Aldrich

Water-18O

10 atom % 18O

Synonym(s):

18O Water

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1 G
$160.00
5 G
$616.55

$160.00


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1 G
$160.00
5 G
$616.55

About This Item

Linear Formula:
H218O
CAS Number:
Molecular Weight:
20.02
MDL number:
UNSPSC Code:
12352303
PubChem Substance ID:
NACRES:
NA.12

$160.00


Available to ship onApril 29, 2025Details


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description

Normalized with respect to hydrogen

Quality Level

isotopic purity

10 atom % 18O

form

liquid

mol wt

18.22 by atom % calculation (10 atom % 18O)

bp

100 °C (lit.)

mp

0 °C (lit.)

density

1.11 g/mL at 20 °C (lit.)

mass shift

M+2

storage temp.

room temp

SMILES string

[18OH2]

InChI

1S/H2O/h1H2/i1+2

InChI key

XLYOFNOQVPJJNP-NJFSPNSNSA-N

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Packaging

This product may be available from bulk stock and can be packaged on demand. For information on pricing, availability and packaging, please contact Stable Isotopes Customer Service.

Storage Class

10 - Combustible liquids

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)


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Questions

1–2 of 2 Questions  
  1. The conductivity of the product is 150 uS/cm, which is ~3 orders of magnitude higher than conventional distilled water. Could you recommend some methods to purify (to lower the conductivity) the product in the chemical lab at the university?

    1 answer
    1. The highest allowable conductivity for this product is 150 µS/cm. However, the actual values are typically much lower. A review of lots released since 2017 reveals a range of 0.1 - 5.6 µS/cm. Purification methods to lower conductivity include reverse osmosis and distillation.

      Helpful?

  2. "Purity: 10 atom 18O%" ¿para una muestra de agua significa que contiene un 10% de agua con 18O?

    1 answer
    1. Yes, this means that 10 % of elemental oxygen is 18O. This is atomic percent as opposed to mass percent.

      Helpful?

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