7732-18-5

7732-18-5 - Names and Identifiers

Name	Water
Synonyms	Ice Aqua Water Steam SODA LYE SODIUM HYDRATE Hydrogen oxide SODIUM PLUMBITE Sodiun hydroxide Dihydrogen oxide NATRII HYDROXIDUM NESSLER'S REAGENT B SODIUM HYDROXIDE, FLAKE SODIUM HYDROXIDE SOLUTION Sterile Water For Injection Deionized Ultra-filtered Water
CAS	7732-18-5
EINECS	231-791-2
InChI	InChI=1/H2O/h1H2/i/hH2

7732-18-5 - Physico-chemical Properties

Molecular Formula	H2O
Molar Mass	18.01
Density	0.998 g/cm3 (20℃)
Melting Point	0.0 °C
Boling Point	100°C(lit.)
Water Solubility	Soluble in water. Insoluble in polar liquids.
Solubility	Miscible in methanol, acetone, Ethanol.
Vapor Presure	3 mm Hg ( 37 °C)
Vapor Density	<1 (vs air)
Appearance	liquid
Specific Gravity	1.000 (20/20℃)
Color	colorless
Maximum wavelength(λmax)	['λ: 205 nm Amax: 0.01', , 'λ: 210 nm Amax: 0.01', , 'λ: 250-400 nm Amax: 0.005']
Merck	14,10039
BRN	2050024
PH	7 (20 °C)
Storage Condition	Store at +5°C to +30°C.
Stability	Stable. Incompatible with reactive metals.
Refractive Index	n20/D 1.34(lit.)
Physical and Chemical Properties	Melting Point: 0 ℃ Boiling Point: 100 ℃ density: 0.995 Appearance: colorless transparent liquid

7732-18-5 - Risk and Safety

Safety Description	26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RTECS	ZC0110000
FLUKA BRAND F CODES	34
HS Code	28530010

7732-18-5 - Nature

Open Data Verified Data

Water is a colorless, odorless and odorless transparent liquid at normal temperature and pressure. The melting point is 0 °c, the boiling point is 100 °c, and the density is 0. 9982, the density of the vast majority of substances increases with the decrease of temperature, while the water in 3. There is a maximum value at 98 degrees C, the volume becomes larger and the density decreases when the water is frozen. Water is a kind of amphoteric material; Water can react with many active metals such as K, Ca, Mg, Fe and many other less active metals, and F2, Cl2 and many other non-metallic elements; water is also easy to react with oxides of alkali metals and some alkaline earth metals, and can also react with some non-metallic oxides; Water can undergo hydrolysis reaction with many salts; Water has strong hydration, when many substances are dissolved in water, their molecules or ions can combine with water to form hydrates. Water is an important catalyst. Without trace amounts of water, some common reactions can hardly be carried out.

Last Update：2024-01-02 23:10:35

7732-18-5 - Preparation Method

Open Data Verified Data

Preparation of drinking water using coagulation, sedimentation, clarification, air flotation, filtration, Disinfection and other processes; Electronic ultra-pure water using ion exchange, electrodialysis, Microfiltration membrane filtration and other pure water preparation process.

Last Update：2022-01-01 11:06:06

7732-18-5 - Standard

Authoritative Data Verified Data

This product is obtained by preparing water for injection according to the production process of injection.

Last Update：2024-01-02 23:10:35

7732-18-5 - Trait

Authoritative Data Verified Data

This product is colorless clear liquid; Odorless.

Last Update：2022-01-01 13:38:02

7732-18-5 - Use

Open Data Verified Data

surface water: in the quality standard, Class I is mainly applicable to source water and National Nature Reserve; Class II is mainly applicable to the first-class protection area of surface water source for centralized drinking water, the habitat of rare aquatic organisms, fish and shrimp spawning sites, fish and larvae of the food field; Class III is mainly applicable to the centralized drinking water surface water source protection area, fish and shrimp overwintering field, migration channel, aquaculture area and other fishery waters and swimming area; class IV is mainly applicable to general industrial water areas and recreational water areas with indirect human body contact; Class V is mainly applicable to agricultural water areas and general landscape water areas.
groundwater: Class I in the quality standard mainly reflects the natural low background content of the chemical components of groundwater. Suitable for various uses. Class II mainly reflects the natural background content of the chemical components of groundwater. Suitable for various uses. Class III is based on human health benchmark values. Mainly applicable to centralized drinking water sources and industrial and agricultural water. Class IV is based on agricultural and industrial water requirements. Except for agricultural and some industrial water, it can be used as drinking water after proper treatment. Class V is not suitable for drinking, and other water can be selected according to the purpose of use.
sea water: The first category of quality standards is applicable to marine fishery waters, marine nature reserves and rare and endangered marine biological reserves. The second category is applicable to aquaculture areas, sea baths, marine sports or recreational areas where the human body is in direct contact with sea water, and industrial water areas related to human consumption. The third category is applicable to general industrial water areas and coastal scenic tourist areas. The fourth category is applicable to marine port waters and marine development and operation areas.
drinking water: drinking and domestic water for human life.
electronic ultrapure water: used for electronic components and integrated circuits.

Last Update：2022-01-01 11:06:05

7732-18-5 - Exam

Authoritative Data Verified Data

pH

take 100ml of this product, add 0.3ml of saturated potassium chloride solution, and measure it according to law (General rule 0631). The pH value should be 50~7.0.

chloride, sulfate and calcium salts

take this product and separate it into three test tubes, 50ml for each tube. Add 5 drops of nitric acid and silver nitrate test solution 1 ml in the first tube and add 5ml of barium chloride test solution in the second tube, 2ml of ammonium oxalate solution was added to the third tube, and no turbidity was allowed.

carbon dioxide

take 25ml of this product, put it in 50ml plug measuring cylinder, add 25ml calcium hydroxide test solution, plug and shake, place it, and no turbidity will occur within 1 hour.

easy oxide

take 100ml of this product, add 10ml of dilute sulfuric acid, after boiling, add 0.02 ml of potassium permanganate titration solution (0.10 mol/L), then boil for 10 minutes, and the pink color should not disappear completely.

nitrate and nitrite, ammonia, conductivity, non-volatile, heavy metals and bacterial endotoxin

According to the method under water for injection inspection, should comply with the provisions.

Other

should comply with the relevant provisions under the injection (General Principle 0102).

Last Update：2022-01-01 13:38:03

7732-18-5 - Safety

Open Data Verified Data

Toxicity: non-toxic. The highest tolerance of human body is 2700/m2 volume surface, excessive drinking water will lead to cramps, due to the osmotic effect will lead to electrolyte imbalance, thus causing headache, confusion, severe cases will cause Coma or even death.

Last Update：2022-01-01 11:06:06

7732-18-5 - Category

Authoritative Data Verified Data

solvent, rinse.

Last Update：2022-01-01 13:38:03

7732-18-5 - Specifications

Authoritative Data Verified Data

(l ) lml (2)2ml (3)3ml (4)5ml (5)10ml(6)20ml (7)50ml (8) 500ml (9) 1000ml (10) 3000ml (rinse)

Last Update：2022-01-01 13:38:04

7732-18-5 - Storage

Authoritative Data Verified Data

sealed storage.

Last Update：2022-01-01 13:38:04

7732-18-5 - Reference Information

relative polarity	9
EPA chemical information	Information provided by: ofmpub.epa.gov (external link)
overview	water, chemical formula is H2O, is an inorganic substance composed of hydrogen and oxygen, non-toxic and drinkable. It is a colorless and odorless transparent liquid under normal temperature and pressure, which is called the source of human life. Water is one of the most common substances on the earth. It is an important resource for all life, including inorganic compounds and human beings, and it is also the most important component of organisms.
Form	Water has a variety of forms, including supercritical fluid, supersolid, superfluid, fermion condensed state, plasma state, and the most common solid, liquid and gas; According to the different hydrogen elements that form water molecules, water is divided into heavy water and common water; different solutes in water will make water exhibit different characteristics.
water classification	1. according to different water quality, it can be divided into: soft water: containing sodium ions, potassium ions (alkali metals), and water with hardness lower than 8 degrees is soft water. Hard water: containing magnesium ions, calcium ions (alkaline earth metals), water with a hardness higher than 8 degrees is hard water. Hard water will affect the effect of detergent, and there will be more scale when heated by hard water. 2. According to the content of sodium chloride, it can be divided into: fresh water. Salt water. 3. In addition: biological water: water in different states existing in various life systems. Natural water: Natural water constitutes the general term for various forms of water on the surface of the earth in nature. Including rivers, oceans, glaciers, lakes, swamps and other surface water, as well as natural water bodies such as groundwater in soil and rock layers. Soil water: Water stored in the soil. Groundwater: Water stored underground. Ultra-pure water: extremely pure water, mostly used in the integrated circuit industry. Pure water: high-purity water, considered non-conductive. Crystal water: also known as hydration water. In a crystalline substance, a certain number of water molecules that combine with ions or molecules with chemical bonding forces. The chemical formula of heavy water is D2O, and each heavy water molecule is composed of two deuterium atoms and one oxygen atom. Heavy water accounts for less than 2/10000 of natural water, and the heavy water obtained by electrolyzing water is more expensive than gold. Heavy water can be used as moderator and heat carrier for atomic reactors. The chemical formula of superheavy water is T2O, and each heavy water molecule is composed of two tritium atoms and one oxygen atom. Overweight water is extremely rare in natural water, and its proportion is less than one part per billion. The production cost of overweight water is tens of thousands of times higher than that of water. The chemical formula of semi-heavy water is HDO, and each molecule contains one hydrogen atom, one deuterium atom and one oxygen atom.
use	water resources are used in all aspects of human life and production. Agricultural water: all kinds of irrigation water, water for plants and plants. Industrial water: light industry, heavy industry, mechanical engineering, civil engineering and construction engineering, high-tech industry and energy industry all need to use water resources. if it is suitable for use with E-TOXATE kits ET0100, ET0200 and ET0300 as pH regulating liquid to avoid pollution. The chemical industry is also very diverse. Water is an essential solvent, reaction medium or reagent in inorganic and organic synthesis. The steam reforming of alkanes produces synthesis gas, and the steam cracking produces very valuable olefins (ethylene, propylene); It also plays an important role in the synthesis of acrylic acid based on the oxidation of propane and propylene; in-depth research is now also underway to produce hydrogen peroxide from water. Urban water: Village water, creatures need water, and human life must also use water. Water for sightseeing: Beautiful scenery and sightseeing areas require water. Fountains (including musical fountains) become one of the landscapes with jets of water. Desert irrigation water: Desertification is an important and difficult issue in the world. The cause of desertification lies in the loss or lack of water. Therefore, to solve the problem of desertification, it is necessary to have sufficient water to irrigate and maintain water.
purification method of water	1. distillation method, according to the distillation vessel, it can be divided into glass and Shi Ying distiller, and the metal materials include copper, stainless steel and platinum distiller, etc. According to the number of distillation can be divided into primary, secondary and multiple distillation methods. In addition, in order to remove some special impurities, some special measures need to be taken. For example, adding some potassium permanganate in advance can remove the easy oxide; adding a little phosphoric acid can remove ferric iron; adding a little non-volatile acid can make ammonia-free water. Distilled water can meet the water requirements of ordinary analytical laboratories. Because it is difficult to eliminate the dissolution of carbon dioxide. Therefore, the resistivity of water is very low, not up to MΩ level. It cannot meet the needs of many new technologies. 2. Ion exchange method, there are two main preparation methods: A. Double bed type, that is, according to the way of yang bed-yin bed-yang bed-yin bed-mixed bed connection and production of deionized water; This method was used in the early days to facilitate resin regeneration. B. Mixed bed type (2-5 level series range), mixed bed deionization effect is good, but regeneration is not convenient. The ion exchange method can obtain more than a dozen MΩ deionized water. However, organic matter cannot be removed, and TOC and COD values are often higher than raw water. This is because the resin is not good, or the pretreatment of the resin is not thorough, the oligomers, monomers, additives, etc. contained in the resin are not eliminated, or the resin is unstable and continuously releases decomposition products. All this will be shown in the form of TOC or COD index. For example, when the COD value of tap water is 2mg/L, the COD value of deionized water obtained by deionization treatment is usually between 5 and 10mg/L. Of course, good results will be obtained when using good resin, otherwise ultra-pure water cannot be prepared. 3. Electrodialysis method was produced in 1950. Due to its low energy consumption, it is often used as a pretreatment step for ion exchange method. Under the action of an external DC electric field, it uses cation and cation exchange membranes to selectively allow cation and cation to pass through, so that part of the ions can migrate through the ion exchange membrane to another part of the water, thereby purifying part of the water and concentrating the other part of the water. This is the principle of electrodialysis. Electrodialysis is one of the commonly used desalination techniques. The purity of the produced water can meet the needs of some industrial water. For example, 1.03 MΩ · cm(25°C) of produced water can be obtained with raw water with a resistivity of 1.6 KΩ · cm(25°C). 4. Reverse osmosis is currently the most widely used desalination technology. Although reverse osmosis membrane was established in 1977, its large-scale production and widespread use in desalination have been a matter of recent years. Reverse osmosis membrane can remove inorganic salts, organic matter (molecular weight> 500), bacteria, heat sources, viruses, suspended substances (particle size> 0.1 μm), etc. The resistivity of the produced water can be nearly 10 times higher than that of the raw water. Commonly used reverse osmosis membranes are: cellulose acetate membrane, polyamide membrane and polysulfone membrane. The pore size of the membrane is 0.0001-0.001um. The power of reverse osmosis depends on the pressure difference (10-100 atmospheres). The ability to remove impurities is determined by the performance of the membrane and the ratio of inlet and outlet water. The ratio of water in and out is generally controlled to be about 10: 6 or 10: 7. In this way, the removal rate of impurities should be between 95-99.7%. For example, when the resistivity of raw water is 1.6 KΩ · cm(25°C), the resistivity of the produced water is about 14 KΩ · cm. This kind of water is now called pure water, that is, pure drinking water sold on the market.
toxic substance data	information provided by: pubchem.ncbi.nlm.nih.gov (external link)

Last Update：2024-04-10 22:29:15

Jiangsu Pules Biotechnology Co.,Ltd.

7732-18-5

Water

CAS: 7732-18-5

Molecular Formula: H2O

7732-18-5 - Names and Identifiers

7732-18-5 - Physico-chemical Properties

7732-18-5 - Risk and Safety

7732-18-5 - Nature

Open Data Verified Data

7732-18-5 - Preparation Method

Open Data Verified Data

7732-18-5 - Standard

Authoritative Data Verified Data

7732-18-5 - Trait

Authoritative Data Verified Data

7732-18-5 - Use

Open Data Verified Data

7732-18-5 - Exam

Authoritative Data Verified Data

pH

chloride, sulfate and calcium salts

carbon dioxide

easy oxide

nitrate and nitrite, ammonia, conductivity, non-volatile, heavy metals and bacterial endotoxin

Other

7732-18-5 - Safety

Open Data Verified Data

7732-18-5 - Category

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7732-18-5 - Specifications

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7732-18-5 - Storage

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7732-18-5 - Reference Information

Supplier List

7732-18-5 Request for Quotation

Water

CAS: 7732-18-5

Molecular Formula: H2O

7732-18-5 - Names and Identifiers

7732-18-5 - Physico-chemical Properties

7732-18-5 - Risk and Safety

7732-18-5 - Nature

Open Data Verified Data

7732-18-5 - Preparation Method

Open Data Verified Data

7732-18-5 - Standard

Authoritative Data Verified Data

7732-18-5 - Trait

Authoritative Data Verified Data

7732-18-5 - Use

Open Data Verified Data

7732-18-5 - Exam

Authoritative Data Verified Data

pH

chloride, sulfate and calcium salts

carbon dioxide

easy oxide

nitrate and nitrite, ammonia, conductivity, non-volatile, heavy metals and bacterial endotoxin

Other

7732-18-5 - Safety

Open Data Verified Data

7732-18-5 - Category

Authoritative Data Verified Data

7732-18-5 - Specifications

Authoritative Data Verified Data

7732-18-5 - Storage

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7732-18-5 - Reference Information

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7732-18-5