칼륨과 나트륨의 합금

한글명:칼륨과 나트륨의 합금

카스 번호11135-81-2

상품명:POTASSIUM SODIUM ALLOY

CBNumberCB3113857

분자식H2KNa

포뮬러 무게64.1

MOL 파일11135-81-2.mol

동의어(한글)

칼륨과나트륨의합금

나트륨/ 칼륨 합금

화학적 성질

녹는점	6,8°C
끓는 점	813°C
밀도	0.87 g/mL at 25 °C
증기압	0 mm Hg ( 20 °C)
물리적 상태	액체
Specific Gravity	0.855
감도	air sensitive, moisture sensitive
EPA	Potassium alloy, nonbase, K,Na (11135-81-2)

위험 및 안전 성명

위험품 표기

F,C

위험 카페고리 넘버

11-14/15-34-15

안전지침서

16-26-27-36/37/39-45-43

유엔번호(UN No.)

UN 1422 4.3/PG 1

WGK 독일

자연 발화 온도

248-257 °F

위험 등급

4.3

포장분류

NFPA 704:

	3
3		2

그림문자(GHS)

칼륨과 나트륨의 합금 화학적 특성, 용도, 생산

용도
Alternative to other reagents for desulfurizations, dehalogenations(as Wurtz coupling reactions), and Birch reductions.

Additionally can be used as:
- A reducing agent for aliphatic ester substrates
- A deprotectant in place of the typical heavy metal deprotectant
주요 응용
Sodium-Potassium Alloy is used for preparation of organopotassium compounds; in combination with TMSCl, greatly enhances acyloin condensations; dehalogenation of dihalides; preparation of γ, δ-unsaturated alcohols via fragmentation of γ-halo ketones; in combination with crown ethers is a useful reducing agent for alkynes and alkyl fluorides.
제조 방법
Sodium-Potassium Alloy can be prepared by mixing 1 part Sodium and 5 parts Potassium (by weight) in refluxing xylene until melted. The melt is then carefully mixed with a glass stirring rod, keeping the alloy in one large globule. Upon cooling to room temperature, the alloy will remain liquid and can easily be transferred via a glass pipet.^[1]
Safety Profile
A low-melting alloy of Na and K. Its toxicity is due to either Na or K alone. Corrosive to the eyes, skin, and mucous membranes. Upon contact with moisture it reacts violently to evolve H2; much heat; and a highly caustic residue of NaOH or KOH. Oxidation forms Na2O and K2O, whch are powerful caustics. A dangerous fire and explosion hazard. Violent or explosive reaction with O2, water, moisture, steam, halogens, oxidzers, acids or acid fumes, gving off much heat, hydrogen, toxic and corrosive fumes, often spattering either red-hot particles or actually flaming particles. A severe explosion hazard, wiU react explosively under the appropriate condtions with moisture, acids, acid fumes, solid CO2, carbon disulfide, halocarbons (e.g., CH3Cl, carbon tetrachloride, chloroform, bromoform,1,1,1- trichloroethane, 1,1,2- trichlorotrifluoroethane, tetrachloroethane, CH2Cl2, CH2l2), ammonium sulfate + NH4 + No3, HgO, metal halides (e.g., silver halides, zinc chloride, iron(Ⅲ) chloride), metal oxides (e.g., silver oxide, mercury oxide), nitrogen-containing explosives (e.g., ammonium nitrate, ammonium sulfate, picric acid, nitrobenzene), oxalyl bromide, oxalyl chloride, pentachloroethane, K oxides, KO2, Si, NaHCO3, polytetrafluoroethylene. Reacts vigorously with oxidizing materials. To fight fire, use G-1 powder, dry sodum chloride, dry sodium carbonate, dry calcium carbonate, dry sand, resin-coated sodium chloride, or dry soda ash. Never use water, graphite, carbon dioxide, halocarbons, or foam. Dangerous; when heated it emits highly toxic fumes of Na2O and K2O. Used as a liquid coolant for nuclear reactor cores. See also SODIUM and POTASSIUM.

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