스칸듐

한글명:스칸듐

카스 번호7440-20-2

상품명:SCANDIUM

CBNumberCB4115641

분자식Sc

포뮬러 무게44.96

MOL 파일7440-20-2.mol

동의어(한글)

스칸듐

스칸듐분

스칸듐-45

화학적 성질

녹는점	1540 °C (lit.)
끓는 점	2836 °C (lit.)
밀도	2.99 g/mL at 25 °C (lit.)
용해도	묽은 산에 천천히 녹입니다.
물리적 상태	가루
색상	은회색
Specific Gravity	3
비저항	50.5 μΩ-cm, 0°C
수용성	물과 반응합니다.
감도	air sensitive
Merck	13,8468
노출 한도	ACGIH: TWA 2 ppm; STEL 4 ppm OSHA: TWA 2 ppm(5 mg/m3) NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3)
InChIKey	SIXSYDAISGFNSX-UHFFFAOYSA-N
CAS 데이터베이스	7440-20-2(CAS DataBase Reference)
EPA	Scandium (7440-20-2)

위험 및 안전 성명

위험품 표기

F,T,Xi

위험 카페고리 넘버

5-11-34-23/24/25-36/37/38-36/38

안전지침서

26-28-36/37-7/9-36/37/39-16-43-45-27

유엔번호(UN No.)

UN 3089 4.1/PG 2

WGK 독일

TSCA

Yes

위험 등급

포장분류

III

HS 번호

2805304000

NFPA 704:

	0
3		0

그림문자(GHS)

스칸듐 화학적 특성, 용도, 생산

화학적 성질
grey powder
물리적 성질
Scandium is a soft, lightweight, silvery-white metal that does not tarnish in air, but overtime, it turns yellowish-pink. It resists corrosion. Scandium reacts vigorously with acids, butnot water. Scandium has some properties similar to the rare-earth elements. Although its position in group 3 places it at the head of the 17 elements of the lanthanide series of rare-earthmetals, scandium, as a metal, is not usually considered a rare-earth. Scandium’s melting pointis 1,541°C, its boiling point is 2836°C, and its density is 2.989 g/cm³.
Isotopes
There are 28 isotopes of scandium, ranging from scandium-36 to scandium-57.Scandium-45 is the only stable isotope and contains about 100% of the natural scandium found in the Earth’s crust. The remaining isotopes are radioactive with half-livesranging from nanoseconds to a few minutes to a few hours to a few days, and therefore,they are not found naturally in the Earth’s crust. The radioactive isotopes of scandiumare produced in nuclear reactors.
Origin of Name
From the Latin word Scandia, for “Scandinavia.
출처
Although scandium is chemically similar to rare-earths, it no longer is considered to be oneof them. Scandium is the 42nd most abundant element found in the Earth’s crust, makingup about 0.0025% of the Earth’s crust. It is widely distributed at 5 ppm on the Earth. (It isabout as abundant as lithium, as listed in group 1.) Scandium is even more prevalent in thesun and several other stars than it is on Earth.Scandium is found in ores of wolframite in Norway and thortveitite in Madagascar. It isalso found in granite pegmatites and monazites. It is common in many of the ores where tinand tungsten are also found.
Characteristics
Scandium is the first element in the fourth period of the transition elements, which meansthat the number of protons in their nuclei increases across the period. As with all the transition elements, electrons in scandium are added to an incomplete inner shell rather than tothe outer valence shell as with most other elements. This characteristic of using electrons inan inner shell results in the number of valence electrons being similar for these transition elements although the transition elements may have different oxidation states. This is also whyall the transition elements exhibit similar chemical activity.
용도
Scandium was not produced in any quantities until the late 1930s. Its light weight,resistance to corrosion, and high melting point made it especially useful in the aerospaceindustries. In the early 1940s contractors for the U.S. Air Force appropriated almost all of thescandium metal for use in the construction of military aircraft. The pure metal form is produced by the electrolysis of a salt of scandium, ScCl₃. The metal has found some other uses in high-intensity lamps that produce a natural spectrum, making it useful for stadium lighting.It is also used in nickel alkaline storage batteries. Several compounds are used as catalysts tospeed up chemical reactions. The radioactive scandium-46 (with a half-life of 83.8 days) emitsbeta radiation. This property makes it useful as a radioactive tracer in the petroleum industryto monitor fractionation products.
정의
A lightweight silvery element belonging to the first transition series. It is found in minute amounts in over 800 minerals, often associated with lanthanoids. Scandium is used in high-intensity lights and in electronic devices. Symbol: Sc; m.p. 1541°C; b.p. 2831°C; r.d. 2.989 (0°C); p.n. 21; r.a.m. 44.955910.
위험도
As with other metals, the transition metals and many of their compounds are toxic, andtheir powdered or gaseous forms should not be ingested or inhaled. In addition, all but one ofthe isotopes of scandium are radioactive and should be handled by experienced personnel.

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