碳化硅

外观与性状：

淡灰色粉末

密度：

3.22

熔点：

2700ºC

折射率：

2.65

存储条件/存储方法：

本品应贮藏于阴凉、干燥、通风的库房内，不可与无机酸、碱共贮共运。

稳定性相关：

1.碳化硅纤维拉伸强度大。弹性模数大。在空气中能耐高温，而碳纤维只能耐400 ℃以上的温度。耐药品性能优良。与金属组成复合材料时不需表面处理，而碳纤维必须进行表面处理。相对密度小，仅为2.55。是连续纤维，可以加工成织物，编织袋，绝缘纸、缆绳等各种形态织物。碳化硅有低的导电率，有良好的电波透过性。

2.比金刚石、立方氮化硼等几种物质稍低。碳化硅的热导率很高，大约为氮化硅的2倍；其热膨胀系数约为三氧化二铝的一半；抗弯强度接近氮化硅材料，但断裂韧性比氮化硅小。不溶于水和一般的酸。其化学稳定性好，具有化学惰性。不与氢氟酸、硝酸的混酸反应；与熔融的碱金属接触会慢慢分解成碳酸盐和硅酸盐；加热则与重铬酸钾、铬酸铅的混合物发生反应。具有优异的高温强度和抗高温蠕变能力，热压碳化硅材料在1600℃的高温抗弯强度和室温基本相同。

3.工作人员应作好防护。最大允许浓度10mg/m3。碳化硅极硬，莫氏硬度为13。因为它是边分解边熔融，实际熔点大概在2200℃左右。高纯单晶是透明的结晶。其晶体结构是以立方晶系的β型和六方晶系或斜方晶系的α型为代表。实际上多达130种，具有多种形状。

其它信息：

性状：绿色至蓝黑色结晶性粉末.含杂质的碳化硅为绿色，固溶有炭和金属氧化物杂质呈黑色。

密度（g/mL,25/4℃）：3.25

熔点（ºC）：2830

溶解性：溶于熔融的碱类和铁水，不溶于水、乙醇和酸。

海关代码：

2849200000

危险类别码：

R36/37/38

安全说明：

S26-S36

安全标志：

S26:万一接触眼睛，立即使用大量清水冲洗并送医诊治。
S36:穿戴合适的防护服装。

危险标志：

Xi:Irritant;

CHEMICAL IDENTIFICATION

RTECS NUMBER :

VW0450000

CHEMICAL NAME :

Silicon carbide

CAS REGISTRY NUMBER :

409-21-2

LAST UPDATED :

199712

DATA ITEMS CITED :

30

MOLECULAR FORMULA :

C-Si

MOLECULAR WEIGHT :

40.10

WISWESSER LINE NOTATION :

.SI..C

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :

TCLo - Lowest published toxic concentration

ROUTE OF EXPOSURE :

Inhalation

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

60 mg/m3/6H/13W-I

TOXIC EFFECTS :

Lungs, Thorax, or Respiration - changes in lung weight

REFERENCE :

FAATDF Fundamental and Applied Toxicology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1981- Volume(issue)/page/year: 16,128,1991 ** TUMORIGENIC DATA **

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Intraperitoneal

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

300 mg/kg/26W-I

TOXIC EFFECTS :

Tumorigenic - equivocal tumorigenic agent by RTECS criteria Gastrointestinal - tumors

REFERENCE :

EKSODD Eksperimental'naya Onkologiya. Experimental Oncology. (V/O Mezhdunarodnaya Kniga, 113095 Mosow, USSR) V.1- 1979- Volume(issue)/page/year: 11(2),13,1989

TYPE OF TEST :

TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :

Implant

SPECIES OBSERVED :

Rodent - rat

DOSE/DURATION :

200 mg/kg

REFERENCE :

JJIND8 JNCI, Journal of the National Cancer Institute. (Washington, DC) V.61-79, 1978-87. For publisher information, see JNCIEQ. Volume(issue)/page/year: 67,965,1981 *** REVIEWS *** ACGIH TLV-Not classifiable as a human carcinogen 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 ACGIH TLV-TWA 10 mg/m3, total 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 *** U.S. STANDARDS AND REGULATIONS *** MSHA STANDARD:NUISANCE PARTICULATES DTLWS* "Documentation of the Threshold Limit Values for Substances in Workroom Air," Supplements. For publisher information, see 85INA8. Volume(issue)/page/year: 3,28,1973 OSHA PEL (Gen Indu):8H TWA 15 mg/m3, total dust 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 (Gen Indu):8H TWA 5 mg/m3, respirable fraction 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 15 mg/m3, total dust 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 (Construc):8H TWA 5 mg/m3, respirable fraction 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 15 mg/m3, total dust CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Shipyard):8H TWA 5 mg/m3, respirable fraction 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-AUSTRALIA:TWA 10 mg/m3 JAN 1993 OEL-BELGIUM:TWA 10 mg/m3 JAN 1993 OEL-FRANCE:TWA 10 mg/m3 JAN 1993 OEL-GERMANY:TWA 4 mg/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 10 mg/m3 JAN 1993 OEL-SWITZERLAND:TWA 4 mg/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 10 mg/m3 (total dust) JAN 1993 OEL-UNITED KINGDOM:TWA 5 mg/m3 (resp. 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 SILICON CARBIDE, resp. fraction-air:10H TWA 5 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 RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO SILICON CARBIDE, total dust-air:10H TWA 10 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 : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 17525 No. of Facilities: 25235 (estimated) No. of Industries: 184 No. of Occupations: 97 No. of Employees: 268082 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X4228 No. of Facilities: 158 (estimated) No. of Industries: 4 No. of Occupations: 12 No. of Employees: 8693 (estimated) No. of Female Employees: 84 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X6494 No. of Facilities: 1250 (estimated) No. of Industries: 25 No. of Occupations: 22 No. of Employees: 17481 (estimated) No. of Female Employees: 1482 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 17525 No. of Facilities: 13729 (estimated) No. of Industries: 129 No. of Occupations: 97 No. of Employees: 250945 (estimated) No. of Female Employees: 19568 (estimated)

毒理学数据：

 吸入碳化硅粉尘会沉积于肺部，导致肺病。

生态数据：

其它有害作用：该物质对环境可能有危害，对水体应给予特别注意。

分子结构数据

计算化学数据

1.疏水参数计算参考值（XlogP）:无

2.氢键供体数量:0

3.氢键受体数量:1

4.可旋转化学键数量:0

5.互变异构体数量:无

6.拓扑分子极性表面积0

7.重原子数量:2

8.表面电荷:0

9.复杂度:10

10.同位素原子数量:0

11.确定原子立构中心数量:0

12.不确定原子立构中心数量:0

13.确定化学键立构中心数量:0

14.不确定化学键立构中心数量:0

15.共价键单元数量:1

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  碳化硅红外图谱(IR1)