ChemicalBook
Chinese Japanese Germany

Water

Physical properties Uses Reactions Production Methods
Water
Water
CAS No.
7732-18-5
Chemical Name:
Water
Synonyms
LYE;Eis;R718;Aqua;PP18;steam;WATER;Wasser;Oxidane;SC-3000
CBNumber:
CB5854297
Molecular Formula:
H2O
Formula Weight:
18.01
MOL File:
7732-18-5.mol

Water Properties

Melting point:
318 °C(lit.)
Boiling point:
100 °C(lit.)
Density 
1.515 g/mL at 20 °C
vapor density 
<1 (vs air)
vapor pressure 
3 mm Hg ( 37 °C)
refractive index 
n20/D 1.34(lit.)
Flash point:
100°C
storage temp. 
2-8°C
solubility 
H2O: 1 M at 20 °C, clear, colorless
form 
powder
color 
White to off-white
Water Solubility 
Soluble in water. Insoluble in polar liquids.
Merck 
14,10039
Stability:
Stable. Incompatible with reactive metals.
CAS DataBase Reference
7732-18-5(CAS DataBase Reference)

SAFETY

Hazard Codes  C
Risk Statements  36/38
Safety Statements  26
RIDADR  UN 1824 8/PG 2
WGK Germany  1
RTECS  WB4900000
34
TSCA  Yes

Water price More Price(92)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 00612 Water for ion chromatography 7732-18-5 5l $60.8 2017-11-08 Buy
Sigma-Aldrich 00612 Water for ion chromatography 7732-18-5 2.5l $36.8 2017-11-08 Buy
Sigma-Aldrich WX0001 Pure Water Density Standard 7732-18-5 6 $37.25 2017-11-08 Buy
Sigma-Aldrich 95283 Water for HPCE, for luminescence, for UV-spectroscopy 7732-18-5 250ml $37.8 2017-11-08 Buy
Sigma-Aldrich 1.02699 Pure Water Density Standard 7732-18-5 1EA $38.75 2017-11-08 Buy

Water Chemical Properties,Uses,Production

Physical properties

Colorless, odorless, tasteless liquid; refractive index 1.3330; exists in three allotropic forms: solid ice, liquid water, and gaseous steam (or vapor); density of water increases with temperature, becomes maximum 1.0000 g/mL at 3.98°C and then decreases with rise in temperatures; density at 25°C 0.997 g/cm3; density of water at 100°C 0.9584 g/mL; density of steam 0.000596 g/mL at 100°C. Water freezes to ice at 0°C; expands by about 10% on freezing; boils at 100°C; vapor pressure at 0°, 20°, 50°, and 100°C are 4.6, 17.5, 92.5, and 760 torr, respectively; dielectric constant 80.2 at 20°C and 76.6 at 30°C; dipole moment in benzene at 25°C 1.76; critical temperature 373.99°C; critical pressure 217.8 atm; critical density 0.322 g/cm3; viscosity 0.01002 poise at 20°C; surface tension 73 dynes/cm at 20°C; dissolves ionic substances; miscible with mineral acids, alkalies; low molecular weight alcohols, aldehydes and ketones; forms an azeotrope with several solvents; immiscible with nonpolar solvents such as carbon tetrachloride, hexane, chloroform, benzene, toluene, and carbon disulfide.

Uses

Water is among the most important compounds on earth. It is the main constituent of the hydrosphere, which along with the mantle, crust, and the atmosphere are the four components of our planet. It is present everywhere on earth and is essential for sustenance of life. Water also determines climate, weather pattern, and energy balance on earth. It also is one of the most abundant compounds. The mass of all water on earth is 1.4x1021 kg and the total volume is about 1.4x109 km3, which includes 97.20% of salt water of oceans, 2.15% of fresh water in polar ice caps and glaciers, 0.009% in freshwater lakes, 0.008% in saline lakes, 0.62% as ground waters, 0.005% in soil moisture; 0.0001% in stream channels and 0.001% as vapors and moisture in the atmosphere. Among the major industrial applications of water are generation of hydroelectric power, steam generation, industrial solvent, diluent, moderator in nuclear reactions, industrial coolant, washing and cleaning, textile processing, preparation of food and beverages, filtration processes, and generation of hydrogen by electrolysis. Also, water provides the aqueous phase to carry out innumerable chemical reactions in the production of myriads of chemical substances including mineral acids, alkalies and their salts.

Reactions

Water undergoes autoionization to a small extent; the ionization constant at 25°C is 1.008x10–14: 2H2O(l) ↔ H3O+(aq) + OH¯ Water reacts both as an acid and a base. With bases it reacts as an acid: NH3(aq) + H2O(l) ↔ NH4+(aq) + OH¯; and with acids it reacts as a base: HCl (aq) + H2O(l) → H3O+(aq) + Cl¯(aq) Water reacts with many metal oxides and nonmetal oxides forming bases and acids, respectively: MgO(s) + H2O(l) → Mg(OH)2(s) CaO(s) + H2O(l) → Ca(OH)2 (s) N2O5(s) + H2O(l) → 2HNO3(l) P4O10(s) + 6H2O (l) → 4H3PO4(s) Water also behaves both as an oxidizing and reducing agent. With alkali and alkaline earth metals, which are strong reducing agents, water acts as an oxidizing agent. Reactions occur violently or vigorously at ambient temperatures with all alkali metals and calcium, strontium, and barium forming their hydroxides with liberation of hydrogen: 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g) Ca(s) + 2H2O(l) → Ca(OH)2(s) + H2(g) With less active metals, reactions occur at high temperatures. In such reactions oxides are formed instead of hydroxides, liberating hydrogen: Mg(s) + H2O(l) → MgO(s) + H2(g) Ni(s) + H2O (l) → NiO(s) + H2(g) 3Fe(s) + 4H2O (l) → Fe3O4(s) + 4H2(g) Water reacts with nonmetals and metalloid elements at very high temperatures forming oxides: C(s) + H2O(g)  →CO(g) + H2(g)  Ge(s) + 2H2O(l)  →GeO2(s) + 2H2 (g)   Water behaves as a reducing agent in reactions with oxidizing agents: 2F2 (g) + 2H2O (l) → 4HF (aq) + O2 (g) Water reacts with carbon monoxide at high temperatures (200 to 400°) in the presence of a catalyst to yield carbon dioxide and hydrogen. The reaction also is known as water-gas shift reaction: CO(g) + H2O(l) ↔ CO2 (g) + H2 (g) Water reacts with metal hydrides liberating hydrogen. With the hydrides of sodium and potassium the reaction progresses with explosive violence: NaH + H2O → NaOH + H2 With alkali metal amides violent reactions occur, forming alkali hydroxides and ammonia: NaNH2 + H2O → NaOH + NH3 Violent reactions occur with lithium aluminum hydride and similar compounds: LiAlH4 + 4H2O → LiOH + Al(OH)3 + 4H2 Sodium ethoxide decomposes in water forming sodium hydroxide and ethanol: NaOC2H5 + H2O → NaOH + C2H5OH Sulfuryl chloride, SO2Cl2, reacts with ice-cold water to form a hydrate, SO2Cl2•15H2O. However, at ambient temperature water decomposes sulfuryl chloride slowly forming sulfuric acid and hydrochloric acid: SO2Cl2 + 2H2O → H2SO4 + 2HCl Water reacts with calcium carbide to form acetylene: CaC2 + H2O → C2H2 + CaO Water forms hydrates with a large number of metal salts. Such hydrates are formed from absorption of moisture from air by anhydrous salts. Examples are Na2SO4•7H2O, CuSO4•5H2O, and BaCl2•2H2O. In many salt hydrates, water molecules coordinate to the metal ions, e.g., [Ni(H2O)6](NO3)2. Organic esters are hydrolyzed to form corresponding organic acids and alcohol. The reaction is catalyzed by acids: RCOOR’ + H2O → RCOOH + R’OH

Production Methods

Water is produced by combustion of hydrogen with oxygen at high temperatures in the presence of a catalyst. Also, all combustion reactions of hydrocarbons (C, H compounds) or oxygenated hydrocarbons (C, H, O) yield water and carbon dioxide:
CH4 + 2O2 → CO2 + 2H2O
2CH3OH + 2O2 → 2CO2 + 4H2O
All acid-base neutralization reactions form water:
HCl + NaOH → NaCl + 4H2O
Organic condensation reactions eliminate a water molecule:
CH3COOH + C2H5OH → CH3COOC2H5 + H2O
Many hydroxides dehydrate at high temperatures forming oxides and water:
Ca(OH)2 → CaO + H2O
Water can be purified by distillation, ion exchange, filtration, carbon adsorption, and chlorination.

Chemical Properties

colourless liquid

Uses

For use in the preparation of cell culture media, and cell suspension and washing solutions.

Uses

For use in embryo manipulation.

Definition

ChEBI: An oxygen hydride consisting of an oxygen atom that is covalently bonded to two hydrogen atoms.

Water Preparation Products And Raw materials

Raw materials

Preparation Products


Water Suppliers

Global( 236)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 20810 55
Mainchem Co., Ltd.
+86-0592-6210733
+86-0592-6210733 sales@mainchem.com CHINA 32767 55
Shanghai Macklin Biochemical Co.,Ltd. 15221275939
021-51821727 shenlinxing@macklin.cn China 13251 55
KetoTech, Inc. +1.2178661072
+1.2178661072 info@ketotechnology.com China 3 55
Sinopharm Chemical Reagent Co,Ltd. 86-21-63210123
86-21-63290778 86-21-63218885 sj_scrc@sinopharm.com China 9977 79
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933 jkinfo@jkchemical.com;market6@jkchemical.com China 96817 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) sh@meryer.com China 40398 62
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、802、803、804 Mobile:18930552037
86-21-50328109 3bsc@sina.com China 15940 69
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 saleschina@alfa-asia.com China 30309 84
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 info@energy-chemical.com China 44192 61

7732-18-5(Water)Related Search:


  • IC Anions No. 1 Mixture
  • Oxidane
  • R718
  • steam
  • Tritiotope
  • Wasser
  • Wasserdampf
  • Wasserstoffoxid
  • Water vapor
  • NATRII HYDROXIDUM
  • NESSLER'S REAGENT B
  • SODIUM HYDROXIDE, FLAKE
  • SODIUM HYDROXIDE SOLUTION
  • SODIUM HYDRATE
  • SODIUM PLUMBITE
  • Sodiun hydroxide
  • SODA LYE
  • SODA CAUSTIC
  • Aqua
  • Deionized Ultra-filtered Water
  • CAUSTIC SODA FLAKES MIN.99% & 96% & SODA ASH LIGHT
  • CAUSTIC SOD
  • CAUSTIC SODA MIN98%
  • CAUSTIC SODA FLACK
  • CAUSTIC SODA FLAKES 96% MIN
  • CAUSTIC SODA/CAUSTIC SODA FLAKES
  • CAUSTIC SODA LYE 50% VTV 50T
  • CAUSTIC SODA LYE 46 TO 48 %
  • CAUSTIC SODA FLUX
  • CAUSTIC SODA 50% GRADE
  • CAUSTIC SODA (SODIUM HYDROXIDE)
  • CAUSTIC SODA FLAKE
  • SODIUM HEXA META PHOSPHATE(SHMP)
  • CAUSTIC SODA LYE
  • CAUSTIC SODA LIQUID
  • CAUSTIC SODA 47 % MINIMUM
  • CAUSTIC SODA PRILLS
  • WATER, ACS, FOR INORGANIC TRACE ANALYSIS
  • WATER, A.C.S. REAGENT
  • WATER, FOR CELL BIOLOGY, ULTRAFILTERED A ND AUTOCLAVED
  • WATER PURIFIED, S01, 2.5 L
  • WATER USP GRADE
  • WATER, FOR HPLC, FILTERED
  • CM-MOISTURE TESTER 10X 1 00+-0 01 ML WA
  • WATER,FOR MOLECULAR BIOLOGY, 100 ML
  • Water solution, contains 0.05%(v/v) acetic acid
  • WATER, FOR ANALYTICAL PURPOSES
  • Water, for IC
  • WATER FOR UV-SPECTROSCOPY
  • WATER-16O, NORMALIZED, 17O-AND 18O-DEPLE TED, 99.99 ATOM % 16O
  • WATER FOR LUMINESCENCE
  • WATER ENDOTOXIN-FREE
  • WATER BI-DEST., 1 L
  • WATER, FOR EMBRYO TRANSFER,*EMBRYO TESTE D
  • WATER WITH 0.035% ACETIC ACID, HPLC GRA&
  • WATER PURIFIED S01 1 L
  • WATER, FOR MOLECULAR BIOLOGY
  • WATER CHROMASOLV FOR HPLC
Copyright 2017 © ChemicalBook. All rights reserved