산화 칼륨

한글명:산화 칼륨

카스 번호12136-45-7

상품명:Potassium oxide

CBNumberCB1851546

분자식K2O

포뮬러 무게94.196

MOL 파일12136-45-7.mol

동의어(한글)

산화칼륨

포타슘옥사이드

화학적 성질

녹는점	decomposes at 350℃ [HAW93]
끓는 점	691.46℃[at 101 325 Pa]
밀도	2.350
증기압	0Pa at 25℃
용해도	soluble in H2O, ethanol, ethyl ether
물리적 상태	회색 입방 결정
색상	gray cubic crystals, crystalline
수용성	KOH를 형성하는 물에 용해; 용해성 알코올 및 에테르 [HAW93]
LogP	-5.08 at 25℃
CAS 데이터베이스	12136-45-7
EPA	Potassium oxide (12136-45-7)

위험 및 안전 성명

유엔번호(UN No.)	2033
위험 등급	8
포장분류	II

그림문자(GHS)

산화 칼륨 화학적 특성, 용도, 생산

화학적 성질
gray crystal(s) mass; hygroscopic [CRC10] [HAW93]
용도
Potassium oxide is a strong alkaline flux which is similar to sodium oxide but is slightly less strong and it begins its fluxing action earlier than does sodium oxide, at approximately 1382°F (750°C). It's a predictable, stable flux that produces bright glossy glazes, but it can't be used alone as a flux. Potassium produces slightly stronger glaze surfaces than does sodium oxide. Its low viscosity and surface tension create fluid glaze melts, but its high coefficient of expansion and contraction may cause crazing.
As mentioned above, potassium oxide is often found combined with sodium oxide, so it's often written as KNaO. lt's only slightly volatile at ceramic temperatures and is just slightly soluble.Usually used in its insoluble forms as feldspars or slightly soluble frits, potassium oxide can also be introduced to the glaze recipe as soluble pearl ash (potassium carbonate), which can cause some flashing like sodium carbonate.
Insoluble sources of potassium oxide are potash feldspars such as Custer, G-200, K-200, A-3, Kona F-4(Del Monte), Cornwall stone, Plastic Vitrox, volcanic ash, Kona A-1, Bell, Eureka, A-300, and mica. All soda feldspars have some potassium oxide; frits P-25, 3110, and 3124 contain minor amounts. Soluble forms of potassium oxide include pearl ash(K2CO3), potassium nitrate (saltpeter), and unwashed wood ash.
정의
ChEBI: A metal oxide with formula K2O.
일반 설명
A white-colored crystalline solid. Denser than water. Contact may severely irritate skin, eyes and mucous membranes. May be toxic by ingestion, inhalation and skin absorption. Used to make other chemicals.
공기와 물의 반응
Soluble in water. The oxides of potassium react with water vigorously and with enough evolution of heat to cause boiling and spattering of hot caustic solution, [Chemical Safety Data Sheets SD-9, SD-10. 1947]. Reacts with warm water with violent explosion [Thorpe and Tlitton J. Chem. Soc. 59:1019: 1891].
반응 프로필
The higher oxides of potassium, formed in air, react explosively with pure potassium, sodium, sodium-potassium alloys, and organic matter [Mellor 2, Supp. 3:1559. 1963].
건강위험
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
화재위험
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.

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