487090

Water-¹⁸O

99 atom % ¹⁸O

• Synonym(s): ¹⁸O Labeled water
• Linear Formula: H₂¹⁸O
• CAS Number: 14314-42-2
• Molecular Weight: 20.02
• MDL number: MFCD00064503
• UNSPSC Code: 12142200
• PubChem Substance ID: 24872241
• NACRES: NA.12

Properties

• description: Normalized with respect to hydrogen
• Quality Level: 200
• isotopic purity: 99 atom % ¹⁸O
• form: liquid
• 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

Description

General description

H₂¹⁸0 is isotopically modified compound consisting of two hydrogen atoms covalently bonded to oxygen-18. It is most convenient to store, transport and use Oxygen-18 in the form of water enriched with this isotope.

Application

O-18 enriched water is used in Positron-Emission Tomography (PET), a nuclear imaging technique that is used to observe metabolic processes in the body as an aid to the diagnosis of disease such as tumors, staging of cancer, metastasis, dementia, etc. H₂¹⁸0 is currently the only potential universal bacterial substrate suitable for stable isotope probing (SIP). It has been used in the quantification of population-specific growth dynamics in benthic bacterial communities in response to changing redox conditions.

Safety Information

• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves