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물
물 구조식 이미지
카스 번호:
7732-18-5
한글명:
동의어(한글):
수소산화물(H2O);얼음;증류수;디수소산화물;물;정제수;미네랄워터;물(WATER)
상품명:
Water
동의어(영문):
Eis;LYE;PP18;R718;Aqua;steam;WATER;Wasser;SC-3000;Oxidane
CBNumber:
CB5854297
분자식:
H2O
포뮬러 무게:
18.01
MOL 파일:
7732-18-5.mol

물 속성

녹는점
318 °C(lit.)
끓는 점
100 °C(lit.)
밀도
0.998 g/cm3 (20℃)
증기 밀도
<1 (vs air)
증기압
3 mm Hg ( 37 °C)
굴절률
n20/D 1.34(lit.)
인화점
100°C
저장 조건
2-8°C
용해도
H2O: 1 M at 20 °C, clear, colorless
물리적 상태
powder
산도 계수 (pKa)
pKa 13.996±0.001(H2O t = 25.00 I = 0.000) (Uncertain)
색상
White to off-white
Specific Gravity
1.000 (20/20℃)
상대극성
9
수소이온지수(pH)
14 (H2O, 20°C)
수용성
Soluble in water. Insoluble in polar liquids.
최대 파장(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
안정성
Stable. Incompatible with reactive metals.
CAS 데이터베이스
7732-18-5(CAS DataBase Reference)

안전

위험품 표기 C
위험 카페고리 넘버 36/38
안전지침서 26
유엔번호(UN No.) UN 1824 8/PG 2
WGK 독일 1
RTECS 번호 WB4900000
F 고인화성물질 34
TSCA Yes
HS 번호 28530010

물 C화학적 특성, 용도, 생산

화학적 성질

colourless liquid

용도

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

용도

For use in embryo manipulation.

용도

water is listed also as catalyzed, deionized, demineralized, distilled, pure spring, and purified water. Water is an important skin component and is essential for its proper functioning. It is the most common ingredient used in cosmetic formulations and, therefore, is generally listed first on product labels. Water is usually processed to eliminate hardness and minerals, and to avoid product contamination.

용도

Water is a colorless, odorless, tasteless liquid formed by the combi- nation of two hydrogen and one oxygen atoms. it allows substances to dissolve and functions as a solvent, dispersing medium, hydrate, and promoter of chemical changes. it is a major constituent in meats, fruits, and vegetables. distilled water is obtained by conden- sation of water vapor.

정의

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

Purification Methods

Conductivity water (specific conductance ca 10-7 mho) can be obtained by distilling water in a steam-heated tin-lined still, then, after adding 0.25% of solid NaOH and 0.05% of KMnO4, distilling once more from an electrically heated Barnstead-type still, taking the middle fraction into a Jena glass bottle. During these operations suitable traps must be used to protect against entry of CO2 and NH3. Water, only a little less satisfactory for conductivity measurements (but containing traces of organic material) can be obtained by passing ordinary distilled water through a mixed bed ion-exchange column containing, for example, Amberlite resins IR 120 (cation exchange) and IRA 400 (anion exchange), or Amberlite MB-1. This treatment is also a convenient one for removing traces of heavy metals. (The metals Cu, Zn, Pb, Cd and Hg can be tested for by adding pure concentrated ammonia to 10mL of sample and shaking vigorously with 1.2mL of 0.001% dithizone in CCl4. Less than 0.1Yg of metal ion will impart a faint colour to the CCl4 layer.) For almost all laboratory purposes, simple distillation yields water of adequate purity, and most of the volatile contaminants such as ammonia and CO2 are removed if the first fraction of distillate is discarded. Most laboratories have glass stills that “doubly” or “trebly” distil water. [See “water” in Chapter 1.]

물 준비 용품 및 원자재

원자재

준비 용품


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