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Water

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Identification
Molecular formula
H2O
CAS number
7732-18-5
IUPAC name
water
State
State

Water is a liquid at room temperature. It is the most common substance on Earth's surface and is essential for all known forms of life.

Melting point (Celsius)
0.00
Melting point (Kelvin)
273.15
Boiling point (Celsius)
100.00
Boiling point (Kelvin)
373.15
General information
Molecular weight
18.02g/mol
Molar mass
18.0150g/mol
Density
0.9970g/cm3
Appearence

Water is a clear, transparent liquid. At a small scale, water has no color, taste, or odor. However, on a larger scale, its color can appear slightly blue. It is often described as the universal solvent due to its capability of dissolving many substances.

Comment on solubility

Solubility of Water (H2O)

Water, with the chemical formula H2O, is often referred to as the "universal solvent" due to its remarkable ability to dissolve a wide variety of substances. This property is essential for many chemical and biological processes. Here are some key points regarding its solubility:

  • Polarity: Water is a polar molecule, which means it has a partial positive charge on one side and a partial negative charge on the other. This polarity allows water to interact effectively with other polar and ionic substances.
  • Dissolution: Many ionic compounds, such as salts, dissolve easily in water. The positive and negative ions are separated by water molecules, making them free to move in solution.
  • Hydrogen Bonding: The ability of water to form hydrogen bonds enhances its solvent capabilities, enabling it to dissolve substances like sugars and acids.

However, it's essential to note that not all substances are soluble in water:

  • Hydrophobic Substances: Compounds such as oils and fats do not dissolve well in water because they are non-polar.
  • Solubility Limits: Each solute has a specific solubility limit in water, and exceeding this limit results in undissolved material.

As a result, the solubility of H2O is of paramount importance in fields ranging from chemistry to environmental science, as it influences everything from reaction rates to the behavior of ecosystems.

Interesting facts

Interesting Facts About Water (H2O)

Water, or H2O, is a compound that is vital to all known forms of life and serves as one of the most crucial substances on Earth. Here are some fascinating aspects of this remarkable compound:

  • Unique Properties: Water exhibits unique physical and chemical properties, such as its high specific heat, which allows it to moderate climate and support diverse ecosystems.
  • Universal Solvent: Often referred to as the "universal solvent," water is capable of dissolving many ionic and polar substances, making it essential in biological and chemical processes.
  • Hydrogen Bonding: The ability of water to form hydrogen bonds contributes to its high boiling point and surface tension. This property is crucial for various biological mechanisms, including nutrient transport in plants.
  • States of Matter: Water is unique in that it can exist in all three states of matter—solid (ice), liquid (water), and gas (water vapor)—within the range of temperatures found on Earth.
  • Life's Foundation: Water is a key component of all living organisms, making up to 60% of the human body and playing a crucial role in biochemical reactions, cellular processes, and temperature regulation.

As renowned chemist Robert H. Pohl once said, "Water is the most important substance on Earth," emphasizing its central role in the understanding of chemistry and life itself. Through the study of water, scientists continue to uncover its significance in environmental science, biology, and even in the formation of weather patterns.

Whether you are sipping a glass of water or observing the mighty oceans, the importance of H2O is everywhere around us, nurturing our planet and sustaining life.

Synonyms
water
7732-18-5
Distilled water
Dihydrogen oxide
Sterile water
Water, deionized
oxidane
Purified water
Water vapor
aqua
Water, purified
Dihydrogen Monoxide
Deionized water
DHMO
Oxygen atom
agua
steam
CCRIS 6115
Ultrex ii ultrapure
Water for injection
Sterile water for irrigation
Sterile purified water
Water for hemodialysis
acqua
dihydridooxygen
Wasser
Water, purified sterile
Water, sterile purified
Water purified
Aqua Purificata
Sterile water for injection
EINECS 231-791-2
H2O
Sterile water for inhalation
UNII-059QF0KO0R
Water for inhalation, sterile
NSC 147337
NSC-147337
Water, HPLC
Water, HPLC grade
AQUAFINA
059QF0KO0R
CHEBI:15377
Water, DEPC-Treated
HSDB 8183
Deuterium Cdepleted water
MFCD00011332
Tritiotope
DTXSID6026296
Water, mineral
Water, for HPLC
HOH
Water; Dihydrogen oxide
NSC 147337; R 718
B1217
R-718
Water, sterile
Water, distilled
(OH2)
[OH2]
1,3-epoxy-
Water, sterile-filtered, BioReagent, suitable for cell culture
Pur-wash
MFCD00044636
MFCD00064503
Water (distilled)
eau
BOUND WATER
Sterile water in plastic container
Water for injection, sterile
Adelheidsquelle
Eyewash
Ocufresh
Wiesbaden
Water for irrigation, sterile
Water,deionized
Water,distilled
Water,sanitized
Adelheid aqua
Aqua adelheid
Aqua wiesbaden
Water solution
Water,purified
Water,sterile
Wiesbaden aqua
Aqua wildbad
Dynamic Eyewash
Eye Irrigating
Water Additive
Wildbad aqua
Dorama-neo
Eyewash additive
Neutral-Eyes
Real Eyewash
Xpect Eyewash
BoutonEye Wash
Bio rock water
Eye Stream
Eyewash Solution
Rock Water
water-
AeroWash Eyewash
SalinaaxEye Wash
Eye Clean
DI water
Eye Wash
hydrogen hydroxide
Leader Eye Wash
Rugby Eye Wash
Boraqua Eye Wash
Bacteriostatic water for injection
Buffered Eye-lert
Eys Eye Wash
Firstep Firstflush
Sterile water for injection in plastic container
Fendall Pure Flow
gel relajante CBD
Scienceware Eyewash
Water for injection, bacteriostatic
Aqua pro injectione
Pure Water Density Standard, UKAS ISO/IEC17025 and ISO Guide 34 certified, density: 0.9982 g/mL at 20 C, density: 0.9970 g/mL at 25 C
Water,bacteriostatic
ECOLAB Eye Wash
A-Med
Water for injections
Eyesaline Concentrate
Water, ACS reagent
Water, HPLC Plus
Water, LCMS grade
Ionized Alkali Water
Plus Rinse Emergency
Water, PCR Reagent
Bacteriostatic water for injection in plastic container
Eyes Alive Eye Wash
Sterile water (TN)
Water, LC/MS
Haws Eyewash Additive
Family Care Eye Wash
Water, Endotoxin-free
Plum Emergency Eyewash
Crane Safety Eye Wash
Industrial Neutral-eyes
Physicianscare Eye Wash
WATER/EAU/AQUA
an unknown oxygen source
Quality Choice Eye Wash
WATER [VANDF]
Water, purified (USP)
H-OH
ddWater (endotoxin-free)
Eyewash Flushing Solution
Purified water (JP18)
Sperian Eyesaline Eyewash
Water (JP18/USP)
Water, for TOC analysis
OpticlearSterile Eye Wash
WATER [JAN]
WATER [WHO-DD]
Prinzing Eye Wash Station
WATER [MI]
Eyesaline Emergency Eyewash
Kollourion Eyesalve Eyewash
Plum Duo Emergency Eyewash
Distilled water, for HPLC
InChI=1/H2O/h1H2
Water, deionized (<2uS)
Water, RNase, DNase-free
Dynamic Eyewash with Eyecup
Pure Water Density Standard
Sterile water for injections
Thesafetydirector Aquapreserv
Water for irrigation,sterile
Water, HPLC gradient grade
Easy Care First Aid Eyewash
Plus Rinse Emergency Eyewash
Water, deionized (<10uS)
Water, demineralized, p.A.
very long chain fatty alcohol
very long-chain fatty alcohol
Water,bacteriostatic injection
Advanced Eye Relief Eye Wash
Fad First Aid Direct Eyewash
Water for injection (JP18)
Water, distilled, conductivity or of similar purity
Water, for ion chromatography
Water,Reagent(Deionizedwater)
B1217 [LANGUAL]
HYDROGEN OXIDE (H2O)
Density Standard 998 kg/m3
very long chain fatty alcohols
very long-chain fatty alcohols
Aqua sterilisata pro injectione
Water, ultrapure, HPLC Grade
DTXCID106296
Medi-first First Aid Eye Wash
Water, BioPerformance Certified
Aerowash Eyewash and Skin-rinse
PURIFIED WATER [MART.]
CHEMBL1098659
SalinaaxEye Wash and Skin Flush
Water, Molecular Biology Reagent
XLYOFNOQVPJJNP-UHFFFAOYSA-
diethylpyrocarbonate-treated Water
DTXSID00170378
Xpect First Aid Buffered Eyewash
CHEBI:197504
QVGXLLKOCUKJST-UHFFFAOYSA-N
TUJKJAMUKRIRHC-UHFFFAOYSA-N
Water, Reagent (Deionized water)
DTXSID901318744
Sperian Eyesaline Emergency Eyewash
Crackle Test Reference Standard: 0 wt% H2O in 10W30 Motor Oil
Medi-first Plus First Aid Eye Wash
Water, tested according to Ph.Eur.
Crackle Test Reference Standard: 0.1 wt% H2O in 10W30 Motor Oil
Crackle Test Reference Standard: 0.5 wt% H2O in 10W30 Motor Oil
Crackle Test Reference Standard: 1.0 wt% H2O in 10W30 Motor Oil
NSC147337
Well and Good Eye Rinse and Cleaner
Purified water in containers (JP18)
AKOS015950726
E-Toxate(TM) Water, endotoxin, free
Plum Emergency Eyewash Ph Neutralizing
Water with 0.1% trifluoroacetic acid
DB09145
Xpect First Aid Buffered Eye and Skin
Water, for UHPLC, for mass spectrometry
Distilled water, Laboratory reagent grade
Physicianscare Ophthalmic Solution Eyewash
Q283
SY001268
SY072812
T-27
A-med Brand First Aid Eye and Skin-rinse
Emergency Eye Wash, PW, SterileSter-Aide
Plum Duo Emergency Eyewash Ph Neutralizing
Water for injection in containers (JP18)
Water, ultrapure, Spectrophotometric Grade
Fad First Aid Direct Buffered Eye and Skin
NS00076359
Sterile purified water in containers (JP18)
Water, ACS reagent, for ultratrace analysis
Water, packaged for use in deposition systems
C00001
D00001
Q274959
Q427071
Water, for HPCE, for luminescence, for UV-spectroscopy
Density Standard 998 kg/m3, H&D Fitzgerald Ltd. Quality
Plum Emergency Eyewash/Eyewash DUO/Eyewash Shower ISS USA
Water, for molecular biology, DEPC-treated and sterile filtered
PhysiciansCare Ophthalmic Solution EyewashPurified Water, 98.3%
Water, 99.999%, contained in 50 ml Swagelok? cylinder for CVD/ALD
Water, deionized 18 megaohm ASTM Type I, suitable for trace metal analysis
Water, for cell biology, free of endotoxins, ultrafiltered and autoclaved
Plum pH Neutral Emergency Eyewash/Emergency Eyewash DUO/Emergency Eyewash Shower ISS USA
Water, for embryo transfer, sterile-filtered, BioXtra, suitable for mouse embryo
231-791-2
8O
OH2