方石英

方石英 基本信息
CAS号 14464-46-1 分子式 SiO2
分子量 60.08348 精确质量 　59.96676
PSA 　34.1 A2 LogP 　-0.61840
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目录
基本信息 制备方法与用途 物化性质 安全信息 毒性

基本信息 展开↓

CAS号：
14464-46-1
分子式：
SiO2
分子量：
60.08348
中文名称：
方石英
英文名称：
Cristobalite (SiO2)
中文别名：
方石英;
白硅石,方英石,方石英;
方英石;
砂;
矽膠;
二氧化硅(微粉硅胶);
白硅石;
二氧化硅
英文别名：
Cristobalite (SiO2);
SILICA;
43-63c;
alpha-crystobalite;
calcineddiatomaceousearth;
calcineddiatomite;
cristobalite(sio2);
crystallinesilica(non-specificname);
crystallinesilica,cristobalite;
crystallinesilicondioxide,cristobalite
精确分子量/精确质量：
59.96676
极性分子表面积/PSA：
34.1 A2
油水分配系数/LogP：

LogP值指的是某物质在正辛醇/水两相体系中的分配系数的对数值，反映了物质在油水两相中的分配情况。其中、LogP值越大，说明该物质越亲油；反之，LogP值越小，则说明该物质越亲水。
贝尔斯坦号/MDL：
MFCD00011232
EINECS：
262-373-8
PubChem：
24899661

生产制备方法及用途展开↓

合成制备方法

硝酸法　水玻璃溶液和硝酸反应生成二氧化硅，经漂洗、酸洗、去离子水漂洗、脱水制得电子级二氧化硅。反应式如下：

用途

用于电子显像管、投影管、视波管等玻璃平面与荧光粉之间的黏结。

物化性质展开↓

外观与性状：
淡灰色固体
密度：
2.3 g/cm3
熔点：
1550 °C
沸点：
2230 °C
折射率：
n20/D 1.544(lit.)
存储条件/存储方法：

贮存在通风、干燥处、避免受潮和污染。装卸时要轻拿轻放，防止包装破损。失火时，可用水和各种灭火器扑救。

其它信息：

1.性状：白色无定形微细粉末

2.熔点（ºC）：1750

3.溶解性：不溶于水及酸。高温不分解。有吸水性、多孔性。

安全信息展开↓

危险类别码：
48/20
安全说明：
22
危险标志：
Xn,T

毒理性展开↓

CHEMICAL IDENTIFICATION

RTECS NUMBER :
VV7325000
CHEMICAL NAME :
Silica, crystalline - cristobalite
CAS REGISTRY NUMBER :
14464-46-1
LAST UPDATED :
199712
DATA ITEMS CITED :
38
MOLECULAR FORMULA :
O2-Si
MOLECULAR WEIGHT :
60.09
WISWESSER LINE NOTATION :
SI O2

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
TCLo - Lowest published toxic concentration
ROUTE OF EXPOSURE :
Inhalation
SPECIES OBSERVED :
Human
DOSE/DURATION :
16 mppcf/8H/17.9Y-I
TOXIC EFFECTS :
Lungs, Thorax, or Respiration - fibrosis, focal (pneumoconiosis) Lungs, Thorax, or Respiration - cough Lungs, Thorax, or Respiration - dyspnea
REFERENCE :
NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: PB246-697
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intratracheal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
200 mg/kg
TOXIC EFFECTS :
Lungs, Thorax, or Respiration - fibrosis, focal (pneumoconiosis)
REFERENCE :
BJIMAG British Journal of Industrial Medicine. (British Medical Journal, Box 560B, Kennebunkport, ME 04046) V.1- 1944- Volume(issue)/page/year: 10,9,1953 ** TUMORIGENIC DATA **
TYPE OF TEST :
TDLo - Lowest published toxic dose
ROUTE OF EXPOSURE :
Intrapleural
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
90 mg/kg
TOXIC EFFECTS :
Tumorigenic - Carcinogenic by RTECS criteria Blood - lymphoma, including Hodgkin's disease
REFERENCE :
JNCIAM Journal of the National Cancer Institute. (Washington, DC) V.1-60, 1940-78. For publisher information, see JJIND8. Volume(issue)/page/year: 57,509,1976
TYPE OF TEST :
TD - Toxic dose (other than lowest)
ROUTE OF EXPOSURE :
Intrapleural
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
100 mg/kg
REFERENCE :
BJCAAI British Journal of Cancer. (Macmillan Press Ltd., Houndmills, Basingstoke, Hants. RG21 2XS, UK) V.1- 1947- Volume(issue)/page/year: 41,908,1980 *** REVIEWS *** ACGIH TLV-TWA 0.05 mg/m3, respirable dust DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 IARC Cancer Review:Animal Sufficient Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 42,39,1987 IARC Cancer Revew:Animal Sufficient Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 68,41,1997 IARC Cancer Review:Human Limited Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 42,39,1987 IARC Cancer Revew:Human Sufficient Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 68,41,1997 IARC Cancer Revew:Group 1 IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man. (WHO Publications Centre USA, 49 Sheridan Ave., Albany, NY 12210) V.1- 1972- Volume(issue)/page/year: 68,41,1997 TOXICOLOGY REVIEW ANAEA3 Annals of Allergy. (American College of Allergists, POB 20671, Bloomington, MN 55420) V.1- 1943- Volume(issue)/page/year: 35,165,1975 TOXICOLOGY REVIEW 31BYAP "Experimental Lung Cancer: Carcinogenesis and Bioassays, International Symposium, 1974," Karbe, E., and J.F. Park, eds., Springer-Verlag New York, Inc., 1974 Volume(issue)/page/year: -,93,1974 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD-respirable dust in air:TWA 10 mg/m3/2(% resp. SiO2+2) DTLWS* "Documentation of the Threshold Limit Values for Substances in Workroom Air," Supplements. For publisher information, see 85INA8. Volume(issue)/page/year: 3,33,1973 MSHA STANDARD-total dust in air:TWA 30 mg/m3/2(% SiO2+3) DTLWS* "Documentation of the Threshold Limit Values for Substances in Workroom Air," Supplements. For publisher information, see 85INA8. Volume(issue)/page/year: 3,33,1973 OSHA PEL (Gen Indu):8H TWA 5 mg/m3/(% resp SiO2+2) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 5 mg/m3/(% resp SiO2+2) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 20 mppcf/(%SiO2+5) CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-BELGIUM:TWA 0.05 mg/m3 JAN 1993 OEL-DENMARK:TWA 0.05 mg/m3 JAN 1993 OEL-DENMARK:TWA 0.15 mg/m3 (total dust) JAN 1993 OEL-FINLAND:TWA 0.1 mg/m3 JAN 1993 OEL-GERMANY:TWA 0.15 mg/m3 JAN 1993 OEL-RUSSIA:STEL 1 mg/m3 (total dust) JAN 1993 OEL-SWEDEN:TWA 0.05 mg/m3 JAN 1993 OEL-SWITZERLAND:TWA 0.15 mg/m3 JAN 1993 OEL-THAILAND:TWA 10 mg/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 0.05 mg/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 0.15 mg/m3 (total dust) JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO SILICA, cryst. cristobalite-air:10H CA TWA 0.05 mg/m3 REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992 NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - T0624 No. of Facilities: 2072 (estimated) No. of Industries: 33 No. of Occupations: 43 No. of Employees: 31369 (estimated) No. of Female Employees: 2228 (estimated)
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