실리카겔

실리카겔
실리카겔 구조식 이미지
카스 번호:
112926-00-8
한글명:
실리카겔
동의어(한글):
실리콘화합물실리카겔;규산겔;무정형합성실리카젤;산화규소;실리카겔;실리카수화물;침전된 규토
상품명:
Silica gel
동의어(영문):
COLLOIDAL SILICA;SAND;SILICA GEL 60;SILICA GEL DESICCANT;IATROBEADS;SILICA STANDARD;SILICA GEL ORANGE;silicagel,pptd.,cryst.-free;SILICA GEL 60 FOR COLUMN CHROMATOGRAPHY;gsj-30
CBNumber:
CB1199389
분자식:
O2Si
포뮬러 무게:
60.0800018310547
MOL 파일:
Mol file
MSDS 파일:
SDS

실리카겔 속성

녹는점
1610°C
끓는 점
2230℃
밀도
2.6
인화점
23°C
저장 조건
2-8°C
물리적 상태
분말 또는 과립
Specific Gravity
0.88g/ml
색상
파란색
냄새
냄새 없는
pH 범위
About 7.0
수소이온지수(pH)
~6.8 (10% in aq. suspension)
수용성
물에 불용성
Hydrolytic Sensitivity
6: forms irreversible hydrate
Merck
14,8493
CAS 데이터베이스
112926-00-8
EPA
Silica gel, pptd., cryst.-free (112926-00-8)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 Xi,T,N,Xn
위험 카페고리 넘버 20-37-42/43-49-36/37-48/20-51/53-68-50/53-41-22-60
안전지침서 22-24/25-45-36/37-53-26-36-61-60-39
유엔번호(UN No.) 1993
WGK 독일 2
RTECS 번호 VV7315000
F 고인화성물질 3
위험 참고 사항 Harmful/Irritant
TSCA Yes
기존화학 물질 KE-32733
그림문자(GHS): GHS hazard pictograms
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H412 장기적 영향에 의해 수생생물에 유해함 수생 환경유해성 물질 - 만성 구분 3 P273, P501
예방조치문구:
P201 사용 전 취급 설명서를 확보하시오.
P273 환경으로 배출하지 마시오.
P308+P313 노출 또는 접촉이 우려되면 의학적인 조치· 조언를 구하시오.

실리카겔 MSDS


Silica gel

실리카겔 C화학적 특성, 용도, 생산

화학적 성질

white to off-white powder

출처

Silica gels are dispersions of colloidal silica obtained by a sol–gel process. The process consists in precipitating colloidal silica from an aqueous solution of sodium silicate by adding hydrochloric or sulfuric acid. The colloidal precipitate or gel consists mainly of hydrated silica (SiO2 .nH2 O). After filtration the precipitated silica is washed in order to remove residual salts and stabilized by adding ammonia or sodium hydroxide. The stabilized gel is then dried and later calcined to obtain an activated material, usually in the form of small beads.

용도

Silica gel was used on glass plates for preparative TLC and on aluminium sheets for analytical TLC. Silica gel was used in vacuum chromatography and TLC. Silica gel was used in column chromatography.

정의

A gel made by coagulating sodium silicate sol. The gel is dried by heatheating and used as a catalyst support and as a drying agent. The silica gel used in desiccators and in packaging to remove moisture is often colored with a cobalt salt to indicate whether it is still active (blue=dry; pink=moist).

일반 설명

Silica gel is a rigid 3D network of colloidal silica. It is exclusively used as a support material for the active titanium(III) centers in Ziegler-Natta catalysts. Silica gel allows a controlled fragmentation lresulting in the formation of uniform polymer particles with narrow particle size distribution and high bulk density. Silica gel is classified as below:
a. Aquagel - pores are filled with water
b. Xerogel - by the process of evaporation, aqueous phase in the pores are removed
c. Aerogel - solvent removed by supercritical extraction

농업용

A hard granular hygroscopic form of hydrated silica is called silica gel. It is made by heating a coagulated sol of sodium silicate. It is used as a catalyst and a desiccant.

잠재적 노출

Amorphous fumed silica is used as a mineral, natural or synthetic fiber. A potential danger to those involved in the production and handling of fumed silica for paint pigments or catalysts. Diatomaceous earth is used in clarifying liquids, in manufacture of fire brick and heat insulators; used as a filtering agent; as a filler in construction materials; pesticides, paints, and varnishes. A potential danger to those involved in mining of diatomaceous earth or fabrication of products there from.

Purification Methods

Before use as a drying agent, silica gel is heated in an oven, then cooled in a desiccator. Conditions in the literature range from heating at 110o for 15hours to 250o for 2-3hours. Silica gel has been purified by washing with hot acid (in one case successively with aqua regia, conc HNO3, then conc HCl; in another case it was digested overnight with hot conc H2SO4), followed by exhaustive washing with distilled water (one week in a Soxhlet apparatus has also been used), and prolonged oven drying. Alternatively, silica gel has been extracted with acetone until all soluble material was removed, then dried in a current of air, washed with distilled water and oven dried. Silica gel has also been washed successively with water, M HCl, water, and acetone, then activated at 110o for 15hours. Silicon monoxide [10097 -28 -6] M 44.1, m > 1700o, d 4 2.18. Purify the monoxide by sublimation in a porcelain tube in a furnace at 1250o (4hours) in a high vacuum (10-4mm) in a stream of N2. It is obtained as brownish black scales. [Schenk in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 696 1963.]

비 호환성

Silica, amorphous is a noncombustible solid. Generally unreactive chemically. Incompatible with fluorine, oxygen difluoride, chlorine trifluoride. Soluble in molten alkalis and reacts with most metallic oxides at high temperature.

폐기물 처리

Sanitary landfill.

실리카겔 준비 용품 및 원자재

원자재

준비 용품


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